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A key aspect of encouraging people's awareness about carbon dioxide (CO2) emissions associated with various products is penetration of life cycle thinking (LCT). LCT is not a simple concept and should be connected with daily behaviors; it is important to learn LCT not only in primary but also in higher education. Many previous studies suggested that active learning and games can increase the effectiveness of the learning. Against this backdrop, we developed a board game for learning LCT and investigated the effectiveness through a trial with university students. The board game covers key issues, such as power supply configuration, fuel efficiency, CO2 emissions associated with production, operational condition and efficiency, sharing activities, one-way vs. durable products, and so on. Participants completed surveys to evaluate the LCT knowledge they acquired and the game before and after playing. The results showed that their LCT knowledge significantly increased, and was greater in the group with lower LCT knowledge before the game. The participants positively evaluated the game regarding satisfaction and extension to daily life. The positive evaluations were not directly correlated with the increase in LCT knowledge in the group with higher LCT knowledge before the game, whereas satisfaction with the game had a positive influence on the increase in LCT knowledge in the group with lower LCT knowledge before the game. Implications for improvement, such as combining the game with post-learning activities and means of showing value, were also discussed.
Kiyo Kurisu; Hiroki Okabe; Jun Nakatani; Yuichi Moriguchi. Development of board game to encourage life cycle thinking, and trial with university students in Japan. Cleaner and Responsible Consumption 2021, 3, 100033 .
AMA StyleKiyo Kurisu, Hiroki Okabe, Jun Nakatani, Yuichi Moriguchi. Development of board game to encourage life cycle thinking, and trial with university students in Japan. Cleaner and Responsible Consumption. 2021; 3 ():100033.
Chicago/Turabian StyleKiyo Kurisu; Hiroki Okabe; Jun Nakatani; Yuichi Moriguchi. 2021. "Development of board game to encourage life cycle thinking, and trial with university students in Japan." Cleaner and Responsible Consumption 3, no. : 100033.
Recently, the sharing economy has emerged as a new consumption style. Although sharing's additional environmental loads and rebound effects are concerning, it has the potential to reduce environmental loads by suppressing new production and the effective use of products. In this study, we investigated differences among consumers based on their usage experiences and future intentions, focusing on the differences among the various sharing services. We investigated consumers' motivations and barriers in two countries: Japan and Switzerland. The results showed that individuals with prior usage experience showed higher future usage intentions for the service. The motivations and barriers of individuals who had future intentions were more realistic, such as economic (price), space, quality and safety issues. The respondents with no future use intentions showed other barriers, such as “do not want to use” and “no product”, and presented more specific motivations to get additional value, such as “getting acquainted with a new person” and having an “interesting experience”. Individuals with prior experience were relatively younger and had higher “materialism” and “normative” tendencies, indicating the active and aggressive personal characteristics of sharing-service users. The comparison between the two countries also indicated that the maturity of the service, in other words, time since the service was launched, gave the difference of usage and motivation. Besides, the cultural and economic differences can also lead to different motivations and barriers as well as different levels of acceptability of secondhand-goods usage. This study revealed the influence of consumers' prior usage experiences on their future intentions to use, motivations, and barriers. We also showed that motivations and barriers can change as the service matures through the cross-national comparison between Japan and Switzerland.
Kiyo Kurisu; Riho Ikeuchi; Jun Nakatani; Yuichi Moriguchi. Consumers’ motivations and barriers concerning various sharing services. Journal of Cleaner Production 2021, 308, 127269 .
AMA StyleKiyo Kurisu, Riho Ikeuchi, Jun Nakatani, Yuichi Moriguchi. Consumers’ motivations and barriers concerning various sharing services. Journal of Cleaner Production. 2021; 308 ():127269.
Chicago/Turabian StyleKiyo Kurisu; Riho Ikeuchi; Jun Nakatani; Yuichi Moriguchi. 2021. "Consumers’ motivations and barriers concerning various sharing services." Journal of Cleaner Production 308, no. : 127269.
Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), PHBH or PHBHHx, is a novel bio-based polymer that is biodegradable in both soil and marine environments. While bio-based and biodegradability are often celebrated features to mitigate environmental problems of plastics, their life cycle environmental impacts contain uncertainties that are yet to be fully understood. To develop effective introduction schemes for PHBH, this study assessed the life cycle climate change implications of PHBH. We computed the life cycle greenhouse gas emissions (GHG) and fossil resource consumption of produce bags and spoons composed of PHBH and their fossil-based alternatives based on industrial-scale data. The products were assessed against 10 end-of-life scenarios for commercial plastics. As a result, the cradle-to-gate GHG of PHBH ranged between 0.32 and 16.5 kgCO2e/kg-PHBH depending on the land-use change assumed for the biomass production. The product-based comparative analysis presented that PHBH spoons have lower cradle-to-grave GHG emissions over their fossil-based alternatives but not with produce bags because PHBH spoons have a smaller GHG per functional unit than that of its fossil counterpart. The end-of-life scenario analysis conveyed that PHBH should be introduced to a region with a plastic waste management system that avoids methane generation and facilitates energy recovery.
Eri Amasawa; Tomoki Yamanishi; Jun Nakatani; Masahiko Hirao; Shunsuke Sato. Climate Change Implications of Bio-Based and Marine-Biodegradable Plastic: Evidence from Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). Environmental Science & Technology 2021, 55, 3380 -3388.
AMA StyleEri Amasawa, Tomoki Yamanishi, Jun Nakatani, Masahiko Hirao, Shunsuke Sato. Climate Change Implications of Bio-Based and Marine-Biodegradable Plastic: Evidence from Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). Environmental Science & Technology. 2021; 55 (5):3380-3388.
Chicago/Turabian StyleEri Amasawa; Tomoki Yamanishi; Jun Nakatani; Masahiko Hirao; Shunsuke Sato. 2021. "Climate Change Implications of Bio-Based and Marine-Biodegradable Plastic: Evidence from Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)." Environmental Science & Technology 55, no. 5: 3380-3388.
Sustainable production and consumption are categorized as target 12 in the United Nations’ Sustainable Development Goals. The “sharing economy” has been developing globally as a new consumption style, and it is often recognized as being environmentally friendly by both consumers and service providers. Several aspects of the practice, such as the avoidance of new production, can reduce the impact to the environment. However, additional factors, such as the expansion of consumption, namely rebound effects, can increase the impact to the environment. Although many variables exist to determine the total impact of sharing services on the environment, additional and rebound effects and the uncertainty of influential variables have not been well considered. In this study, we aim to reveal the conditions that car-sharing practices place in increasing or decreasing environmental loads, and to identify the significant influential factors on the environment imposed by car-sharing services. We analyze the CO2 emission of car sharing by considering various influential factors and their distributions. Furthermore, we consider differences in car size, fuel type, ownership condition, and several other factors in the simulation. The distribution of each variable is determined, and a Monte Carlo simulation is conducted. The CO2 emissions from the production and operational stages over a 10-y period are estimated. The simulation is conducted with sensitivity analysis to identify the variables that contribute significantly to the total CO2 emission. In some cases, the CO2 emission involved in car sharing exceeded cases in which car sharing is not practiced. Among those cases, although the main contributor to the total CO2 emission is in the operational stage, CO2 emission from the production stage increased the amount of emission. It is discovered that the number of cars increased significantly during the target 10 y after sharing is introduced in some cases. These results indicate a high probability that car sharing can achieve CO2 reduction, but the increase in CO2 emission can occur under certain conditions. Additionally, the sensitivity analysis shows that the main determinants of CO2 emission are the ratio of people who eliminated their private cars, degree of rebound effect, and increasing ratio of number of cars introduced to car-sharing practices. This suggests that whether car sharing becomes environmentally friendly depends substantially on consumer behavior and the manner in which sharing services are operated.
Katsuya Tsuji; Kiyo Kurisu; Jun Nakatani; Yuichi Moriguchi. Evaluation of Environmental Impact of Car Sharing in Consideration of Uncertainty of Influential Variables. International Journal of Automation Technology 2020, 14, 975 -983.
AMA StyleKatsuya Tsuji, Kiyo Kurisu, Jun Nakatani, Yuichi Moriguchi. Evaluation of Environmental Impact of Car Sharing in Consideration of Uncertainty of Influential Variables. International Journal of Automation Technology. 2020; 14 (6):975-983.
Chicago/Turabian StyleKatsuya Tsuji; Kiyo Kurisu; Jun Nakatani; Yuichi Moriguchi. 2020. "Evaluation of Environmental Impact of Car Sharing in Consideration of Uncertainty of Influential Variables." International Journal of Automation Technology 14, no. 6: 975-983.
Summary Urbanization and population growth have contributed to a tripling of building material consumption from 2000 to 2017. Building materials have a range of environmental impacts throughout their life cycle, from extraction, processing, and transport of raw materials to building construction, use, and eventual demolition and waste. Mitigation measures that target specific materials or value chain stages may therefore have incremental or even adverse net environmental effects. In this perspective, we develop a framework for applying life cycle thinking to identify key impacts and corresponding mitigation approaches, inform building design and material selection, and ensure effective treatment and recycling of construction and demolition wastes. Life cycle evaluation can also be used to assess and avoid environmental trade-offs among life cycle stages. Challenges for implementing these life cycle principles include collecting and integrating inventory data for products, managing multiple stakeholders within the construction industry, and monitoring end-of-life impacts; measures for overcoming such challenges are discussed.
Beijia Huang; Xiaofeng Gao; Xiaozhen Xu; Jialing Song; Yong Geng; Joseph Sarkis; Tomer Fishman; Harnwei Kua; Jun Nakatani. A Life Cycle Thinking Framework to Mitigate the Environmental Impact of Building Materials. One Earth 2020, 3, 564 -573.
AMA StyleBeijia Huang, Xiaofeng Gao, Xiaozhen Xu, Jialing Song, Yong Geng, Joseph Sarkis, Tomer Fishman, Harnwei Kua, Jun Nakatani. A Life Cycle Thinking Framework to Mitigate the Environmental Impact of Building Materials. One Earth. 2020; 3 (5):564-573.
Chicago/Turabian StyleBeijia Huang; Xiaofeng Gao; Xiaozhen Xu; Jialing Song; Yong Geng; Joseph Sarkis; Tomer Fishman; Harnwei Kua; Jun Nakatani. 2020. "A Life Cycle Thinking Framework to Mitigate the Environmental Impact of Building Materials." One Earth 3, no. 5: 564-573.
Recent focus on ocean plastics pollution, and the decision to ban waste plastic import by China have significantly impacted several industrial sectors around the world. Yet, the global waste plastic generation is steadily growing, which has driven substantial and rapid growth in worlds’ plastics recycling capacity to meet the needs for sustainable plastics use. In Japan, the Resource Circulation Strategy for Plastics was formulated in May 2019. One of the highlights of this Strategy was the milestones established: 25 % reduction of single-use plastics by 2030, 60 % reuse/recycling of plastic containers and packaging by 2030, complete waste plastic utilization through reuse and recycling by 2035, and introduction of ∼2 Mt of bio-based plastics by 2030. Thus, immediate and substantial promotion of research and development of technologies for plastic waste recycling and creation of social and legislative frameworks for accelerating plastic recycling are in high demand. To enable substantial enhancement in the world’s recycling capacity, we believe that feedstock recycling via pyrolysis technologies is of considerable importance. Thus, this review firstly summarizes global trends in waste plastics recycling and examines the trends and challenges regarding pyrolysis technologies, such as reactor design and effective catalytic pyrolysis, toward chemical feedstock recovery from polyolefinic plastics. The authors’ current project on feedstock recycling, i.e., development of pyrolysis technologies using existing petroleum refinery processes, is introduced, and the potential sources of waste polyolefinic plastics, based on material flow analysis, are discussed.
Shogo Kumagai; Jun Nakatani; Yuko Saito; Yasuhiro Fukushima; Toshiaki Yoshioka. Latest Trends and Challenges in Feedstock Recycling of Polyolefinic Plastics. Journal of the Japan Petroleum Institute 2020, 63, 345 -364.
AMA StyleShogo Kumagai, Jun Nakatani, Yuko Saito, Yasuhiro Fukushima, Toshiaki Yoshioka. Latest Trends and Challenges in Feedstock Recycling of Polyolefinic Plastics. Journal of the Japan Petroleum Institute. 2020; 63 (6):345-364.
Chicago/Turabian StyleShogo Kumagai; Jun Nakatani; Yuko Saito; Yasuhiro Fukushima; Toshiaki Yoshioka. 2020. "Latest Trends and Challenges in Feedstock Recycling of Polyolefinic Plastics." Journal of the Japan Petroleum Institute 63, no. 6: 345-364.
The Japanese government developed a strategy for plastics and laid out ambitious targets including the reduction of 25% for single-use plastic waste and the reuse/recycling of 60% for plastic containers and packaging by 2030. However, the current usage situation of single-use plastics including containers and packaging, which should be a basis of the strategy, is unclear. Here, we identify the nationwide material flow of plastics in Japan based on input–output tables. Of the domestic plastic demand of 8.4 Mt in 2015, 1.6 and 2.5 Mt were estimated to be for containers and packaging comprising household and industry inflows, respectively, through the purchase/procurement of products, services, and raw materials. Considering the current amount of recycling collected from households (1.0 Mt) and industries (0.3 to 0.4 Mt), the reuse/recycling target has already been achieved if the goal is limited to household container and packaging waste, as is the focus of Japan’s recycling law. Conversely, the results indicate that it will be extremely difficult to reach the target collectively with industries. Therefore, it is essential that efforts be made throughout the entire supply chain. Food containers and packaging that flowed into the food-processing and food service sectors accounted for 15% of the inflow of containers and packaging into industries. Thus, the key to achieving the reuse/recycling target will comprise the collection of plastic food packaging from not only households but also the food industry. Furthermore, the collection of flexible plastic films used between industry sectors will put the target within reach.
Jun Nakatani; Tamon Maruyama; Yuichi Moriguchi. Revealing the intersectoral material flow of plastic containers and packaging in Japan. Proceedings of the National Academy of Sciences 2020, 117, 19844 -19853.
AMA StyleJun Nakatani, Tamon Maruyama, Yuichi Moriguchi. Revealing the intersectoral material flow of plastic containers and packaging in Japan. Proceedings of the National Academy of Sciences. 2020; 117 (33):19844-19853.
Chicago/Turabian StyleJun Nakatani; Tamon Maruyama; Yuichi Moriguchi. 2020. "Revealing the intersectoral material flow of plastic containers and packaging in Japan." Proceedings of the National Academy of Sciences 117, no. 33: 19844-19853.
The recovery of electric and electronic waste is one of the key issues in developing a circular society. In Japan, the Act on Promotion of Recycling of Small Waste Electrical and Electronic Equipment was established in 2012 and the collection of small electronic devices has been promoted. However, the collected amount has not increased, and hibernating behaviors are observed. In this study, we focused on household personal computers (PCs), of which the hibernated stock and hibernating behaviors have not previously been analyzed in detail. We conducted a questionnaire survey and obtained data concerning hibernated PCs in households. Based on the data of hibernating period distribution, the hibernation function was estimated and the hibernated PC stock was projected. In addition, the hibernation reasons and possible services that could encourage smooth PC disposal were analyzed and discussed. People kept PCs for less than one year because of using them in the future, while they hibernated PCs 1-5 years because of bothersome feelings and less knowledge about disposal ways and data erasing. The results about actually disposed and possible disposal routes indicated that a certain number of consumers misunderstand or do not know the current PC collection scheme in Japan. The preferred services by respondents also indicated that enforcement of the collection schemes themselves and more intensive public awareness activities are needed to improve the smooth discharge of unused PCs.
Kiyo Kurisu; Jun Miura; Jun Nakatani; Yuichi Moriguchi. Hibernating behavior for household personal computers. Resources, Conservation and Recycling 2020, 162, 105015 .
AMA StyleKiyo Kurisu, Jun Miura, Jun Nakatani, Yuichi Moriguchi. Hibernating behavior for household personal computers. Resources, Conservation and Recycling. 2020; 162 ():105015.
Chicago/Turabian StyleKiyo Kurisu; Jun Miura; Jun Nakatani; Yuichi Moriguchi. 2020. "Hibernating behavior for household personal computers." Resources, Conservation and Recycling 162, no. : 105015.
In rapidly developing countries, such as China, considerable quantities of construction materials have been mobilized with the fast expansion of urban areas. The rural to urban land use transition, especially the upgrade and redevelopment of original rural areas, is a noted driver of material flows. This rural–urban land transition should be incorporated into material flow and stock analyses to provide a more accurate analysis. In this study, a dynamic material flow and stock model that integrates the historical rural–urban land transition was developed to explore the quantity of material stocks and demolition waste from residential buildings in Shanghai—the largest megacity in China from 1950 to 2100. Our results show that the material stocks from residential buildings in Shanghai increased 41-fold from 1950 to 2010, about 957 MMT (million metric tons), and is estimated to be saturated around 2040. Material stocks have experienced asynchronized growth in rural areas, central urban areas, and rural–urban land transition zones (RULT zones) in Shanghai. Until 2040, the RULT zones in Shanghai will be the largest material repository (62%), followed by central urban areas (20%), and rural areas (18%). The amount of demolition waste, which accounted for 10 MMT in 2010, is expected to peak at 29 MMT in 2060s. This suggests the need for a deliberate investment plan to increase waste treatment capacity. In addition, the dominant component of demolition waste will shift from brick to concrete after 2020s. The RULT zones will contribute two-thirds of demolition waste to Shanghai until the 2060s. If we do not consider the reality of the physical status of buildings in RULT zones, the demolition waste will be underestimated by the maximum of 57% in 2003 in urban areas. The key findings on the trend of construction and demolition (C&D) waste generation and the significant contribution of RULT zones can be used as a reference for the strategic planning of treatment facilities. This research framework can be also used to estimate the amount of C&D waste in other fast-developing cities in China and other countries.
Xiaofeng Gao; Jun Nakatani; Qian Zhang; Beijia Huang; Tao Wang; Yuichi Moriguchi. Dynamic material flow and stock analysis of residential buildings by integrating rural–urban land transition: A case of Shanghai. Journal of Cleaner Production 2020, 253, 119941 .
AMA StyleXiaofeng Gao, Jun Nakatani, Qian Zhang, Beijia Huang, Tao Wang, Yuichi Moriguchi. Dynamic material flow and stock analysis of residential buildings by integrating rural–urban land transition: A case of Shanghai. Journal of Cleaner Production. 2020; 253 ():119941.
Chicago/Turabian StyleXiaofeng Gao; Jun Nakatani; Qian Zhang; Beijia Huang; Tao Wang; Yuichi Moriguchi. 2020. "Dynamic material flow and stock analysis of residential buildings by integrating rural–urban land transition: A case of Shanghai." Journal of Cleaner Production 253, no. : 119941.
Shinsuke Murakami; Jun Nakatani; Kenichi Nakajima; Eri Amasawa; Ryota Ii; Kiyotada Hayashi; Naoki Yoshikawa; Ichiro Daigo; Yusuke Kishita; Tomohiko Ihara; Koichi Shobatake; Yuki Kudoh; Masaharu Motoshita; Keiichiro Kanemoto; Minako Hara; Aiichiro Kashiwagi; Seiji Hashimoto; Yosuke Shigetomi; Masayuki Kanzaki; Yasunori Kikuchi; Hajime Ohno; Yasuhiro Fukushima. EcoBalance 2018—Nexus of ideas: innovation by linking through life cycle thinking (9–12 October 2018, Tokyo, Japan). The International Journal of Life Cycle Assessment 2019, 24, 1544 -1552.
AMA StyleShinsuke Murakami, Jun Nakatani, Kenichi Nakajima, Eri Amasawa, Ryota Ii, Kiyotada Hayashi, Naoki Yoshikawa, Ichiro Daigo, Yusuke Kishita, Tomohiko Ihara, Koichi Shobatake, Yuki Kudoh, Masaharu Motoshita, Keiichiro Kanemoto, Minako Hara, Aiichiro Kashiwagi, Seiji Hashimoto, Yosuke Shigetomi, Masayuki Kanzaki, Yasunori Kikuchi, Hajime Ohno, Yasuhiro Fukushima. EcoBalance 2018—Nexus of ideas: innovation by linking through life cycle thinking (9–12 October 2018, Tokyo, Japan). The International Journal of Life Cycle Assessment. 2019; 24 (8):1544-1552.
Chicago/Turabian StyleShinsuke Murakami; Jun Nakatani; Kenichi Nakajima; Eri Amasawa; Ryota Ii; Kiyotada Hayashi; Naoki Yoshikawa; Ichiro Daigo; Yusuke Kishita; Tomohiko Ihara; Koichi Shobatake; Yuki Kudoh; Masaharu Motoshita; Keiichiro Kanemoto; Minako Hara; Aiichiro Kashiwagi; Seiji Hashimoto; Yosuke Shigetomi; Masayuki Kanzaki; Yasunori Kikuchi; Hajime Ohno; Yasuhiro Fukushima. 2019. "EcoBalance 2018—Nexus of ideas: innovation by linking through life cycle thinking (9–12 October 2018, Tokyo, Japan)." The International Journal of Life Cycle Assessment 24, no. 8: 1544-1552.
The lasting urbanization in China has moved to the ‘new-normal’ stage, in which rural-to-urban migration, inefficiency in land use, and insufficient public services are the key challenges. To prevent urban sprawl, the compact city design intensively focuses on the improvement of housing and transport services to increase urban accessibility, vitality and diversity. Clean water and sanitation is also an essential function of cities, but the impacts from China's future urbanization on unheeded water infrastructure were sparsely estimated, especially from a perspective of urban metabolism. This study examines the complex response in the water sector to Chinese urban policies taking resource efficiency into account GHG emissions. A hypothetical grid-city model was developed to connect technical parameters in urban water infrastructure systems to the socio-economic changes, such as population growth, housing blocks, and water end-use. The results show that the pipeline construction dominates material use and locks in significant GHG emissions in the water sector. The most efficient urbanization scenario can reduce 60% of GHG emissions from the water infrastructure, compared to the case of urban sprawl with residency restriction in large cities. A trade-off in scenarios was observed between the optimization for mega-cities and the optimization for the whole of China regarding the additional energy consumption in the water sector. As empirical evidence of China, this study shows the conflict between SDG 6 (Clean water and sanitation) and SDG 13 (Climate action) in the urban water sector can be largely alleviated by an efficiency-focused urban policy complying with SDG 11 (Sustainable cities and communities). A loosen migration regulation and compact urban planning in the medium- and large-sized cities are recommended, along with advanced water technologies to promote sustainable urban water management in China.
Qian Zhang; Shuming Liu; Tao Wang; Xiaohu Dai; Yvette Baninla; Jun Nakatani; Yuichi Moriguchi. Urbanization impacts on greenhouse gas (GHG) emissions of the water infrastructure in China: Trade-offs among sustainable development goals (SDGs). Journal of Cleaner Production 2019, 232, 474 -486.
AMA StyleQian Zhang, Shuming Liu, Tao Wang, Xiaohu Dai, Yvette Baninla, Jun Nakatani, Yuichi Moriguchi. Urbanization impacts on greenhouse gas (GHG) emissions of the water infrastructure in China: Trade-offs among sustainable development goals (SDGs). Journal of Cleaner Production. 2019; 232 ():474-486.
Chicago/Turabian StyleQian Zhang; Shuming Liu; Tao Wang; Xiaohu Dai; Yvette Baninla; Jun Nakatani; Yuichi Moriguchi. 2019. "Urbanization impacts on greenhouse gas (GHG) emissions of the water infrastructure in China: Trade-offs among sustainable development goals (SDGs)." Journal of Cleaner Production 232, no. : 474-486.
The waste liquid crystal display (LCD) panels are both harmful and reusable because of the variety of ingredients contained, for example, the liquid crystal, panel glass, and precious heavy metal. This study assumed one treatment technique which consists of crushing, hydrothermal process and acid-leaching to realize harmless treatment and resource recycling of waste LCD panels, basing on the previous experimental results in our lab. The environmental impacts of this treatment technique were evaluated by using two methods of life cycle assessment of ReCiPe 2008 and Eco-indicator 99 (EI’99). ReCiPe assessment results show that the adverse environmental impacts from the treatment process are dominated by the input of electricity which is followed by the use of hydrogen peroxide and kerosene. The treatment process brings positive impacts on the environment in the category of metal resource depletion but results in more pollution in categories of terrestrial acidification, human toxicity and particulate matter formation. EI’99 analysis reveals that, compared with incineration, the proposed treatment technique of waste LCD panels sharply cut down the negative environmental impacts by 91.5-97.3% under different scenarios.
Luling Yu; Yuichi Moriguchi; Jun Nakatani; Qian Zhang; Feng Li; Wenzhi He; Guangming Li. Environmental Impact Assessment on the Recycling of Waste LCD Panels. ACS Sustainable Chemistry & Engineering 2019, 7, 6360 -6368.
AMA StyleLuling Yu, Yuichi Moriguchi, Jun Nakatani, Qian Zhang, Feng Li, Wenzhi He, Guangming Li. Environmental Impact Assessment on the Recycling of Waste LCD Panels. ACS Sustainable Chemistry & Engineering. 2019; 7 (6):6360-6368.
Chicago/Turabian StyleLuling Yu; Yuichi Moriguchi; Jun Nakatani; Qian Zhang; Feng Li; Wenzhi He; Guangming Li. 2019. "Environmental Impact Assessment on the Recycling of Waste LCD Panels." ACS Sustainable Chemistry & Engineering 7, no. 6: 6360-6368.
Inter-regional spillover of air pollution can be regarded as a mixture of economic externalities and long-distance transport. To comprehensively reveal this problem, a new consumption-based sulfur dioxide (SO2) emission inventory in 2010 for 30 provincial regions of China was compiled by introducing source-receptor relationship (SRR) model to integrate the spillover impacts of physical transport from emitter (producer) region to receptor region and virtual transfer from driver (consumer) region to emitter region. Compared the emissions induced by final regional demand with the emissions received in seven regions of China, Southern (0.59 Mt), Northern (0.25 Mt), Northwestern (0.18 Mt) and Eastern (0.14 Mt) areas outsourced SO2 pollution in the mass, whereas Central (−0.66 Mt), Northeastern (−0.42 Mt) and Southwestern (−0.08 Mt) areas took excessive environmental burdens in 2010. The four municipalities, Chongqing, Shanghai, Beijing and Tianjin as well as the most affluent province Guangdong showed significant pollution transfer after an overall assessment of their roles in drivers, emitters and receptors. Shanxi, Inner Mongolia, Guizhou, Henan and Shandong showed the largest co-benefits of SO2 emissions control for climate change mitigation. Japan was found to receive more portions of transboundary SO2 deposition than its market shares in China's export instead of other major trade partners of China. As a mega-city, Beijing induced significant SO2 emissions for power requirement, food consumption, miscellaneous services and her vibrant research activities through the sectors of power industry, coal mining, chemical manufacturing, food-related industries, petroleum processing and coking, but 86% of those emissions were outsourced by Beijing. In total, the spillover of SO2 emissions induced by Beijing was estimated at 0.20 Mt, 76 times more than its own share as a receptor across the supply chains. This study is competent for an analytic framework of strategic planning for joint prevention and control of air pollution in China and other countries. The results can help reduce pollution transfer, properly tax on drivers, effectively control the emitters, and reasonably compensate the receptors.
Qian Zhang; Jun Nakatani; Yuli Shan; Yuichi Moriguchi. Inter-regional spillover of China's sulfur dioxide (SO2) pollution across the supply chains. Journal of Cleaner Production 2018, 207, 418 -431.
AMA StyleQian Zhang, Jun Nakatani, Yuli Shan, Yuichi Moriguchi. Inter-regional spillover of China's sulfur dioxide (SO2) pollution across the supply chains. Journal of Cleaner Production. 2018; 207 ():418-431.
Chicago/Turabian StyleQian Zhang; Jun Nakatani; Yuli Shan; Yuichi Moriguchi. 2018. "Inter-regional spillover of China's sulfur dioxide (SO2) pollution across the supply chains." Journal of Cleaner Production 207, no. : 418-431.
This paper presents design approaches to induce behavioral shifts toward product sharing through a case study on laundry activities in Japan. Business models involving provision of temporary access to goods are garnering attention as a way to reduce environmental impacts from the current pattern of consumption. However, the success of such business models is a matter of consumer choice, and there exist hurdles for consumers to forego ownership and transfer to product sharing. To understand the forces that affect consumer behavior involving product sharing and to design effective interventions for behavioral shifts, we conducted in-depth interviews and a web survey. From the results, we specified the decision processes in a behavioral shift between home washing and laundromat use, and generated “implementation of a communal laundromat in an apartment building” as a promising way for consumers to shift toward laundromat use. Based on our calculation, the proposed approach has a potential to reduce environmental impact of a hypothetical community by 1.8% in greenhouse gas emissions and 16% in resource use relative to when only home washing is practiced. Our study provides an example of designing interventions for product sharing through reflecting actual usage patterns and consumer motivations.
Eri Amasawa; Yurie Suzuki; Dami Moon; Jun Nakatani; Hirokazu Sugiyama; Masahiko Hirao. Designing Interventions for Behavioral Shifts toward Product Sharing: The Case of Laundry Activities in Japan. Sustainability 2018, 10, 2687 .
AMA StyleEri Amasawa, Yurie Suzuki, Dami Moon, Jun Nakatani, Hirokazu Sugiyama, Masahiko Hirao. Designing Interventions for Behavioral Shifts toward Product Sharing: The Case of Laundry Activities in Japan. Sustainability. 2018; 10 (8):2687.
Chicago/Turabian StyleEri Amasawa; Yurie Suzuki; Dami Moon; Jun Nakatani; Hirokazu Sugiyama; Masahiko Hirao. 2018. "Designing Interventions for Behavioral Shifts toward Product Sharing: The Case of Laundry Activities in Japan." Sustainability 10, no. 8: 2687.
Recycling has become increasingly important as a means to mitigate not only waste issues but also problems related to primary resource use, such as a decrease in resource availability. In order to promote and plan future recycling efficiently, detailed information on the material stock in society is important. For a detailed analysis of material stocks, quantitative information on flows of a material, such as its accumulation pathways, final destinations, and its processing forms, are required. This paper develops a model for tracking accumulation pathways of materials using input–output tables (IOTs). The main characteristics of the proposed model are as follows: (1) accumulations in sectors other than the final demand sectors (i.e., endogenous sectors) are explicitly evaluated, (2) accumulations as accompaniments to products, such as containers and packaging, are distinguished from the products, and (3) processing forms of materials are considered. The developed model is applied to analyze copper flows in Japan using the Japanese IOTs for the year 2011. The results show that accumulations of copper in endogenous sectors were not negligibly small (9.24% of the overall flow). Although accumulations of copper as accompaniments were very small, they may be larger for other materials that are largely used as containers or packaging. It was found that the destinations of copper showed different characteristics depending on the processing forms.
Ryosuke Yokoi; Jun Nakatani; Yuichi Moriguchi. An Extended Model for Tracking Accumulation Pathways of Materials Using Input–Output Tables: Application to Copper Flows in Japan. Sustainability 2018, 10, 876 .
AMA StyleRyosuke Yokoi, Jun Nakatani, Yuichi Moriguchi. An Extended Model for Tracking Accumulation Pathways of Materials Using Input–Output Tables: Application to Copper Flows in Japan. Sustainability. 2018; 10 (3):876.
Chicago/Turabian StyleRyosuke Yokoi; Jun Nakatani; Yuichi Moriguchi. 2018. "An Extended Model for Tracking Accumulation Pathways of Materials Using Input–Output Tables: Application to Copper Flows in Japan." Sustainability 10, no. 3: 876.
Jun Nakatani; Kiyotaka Tahara; Kenichi Nakajima; Ichiro Daigo; Hideaki Kurishima; Yuki Kudoh; Kazuyo Matsubae; Yasuhiro Fukushima; Tomohiko Ihara; Yasunori Kikuchi; Asako Nishijima; Yuichi Moriguchi. A graph theory-based methodology for vulnerability assessment of supply chains using the life cycle inventory database. Omega 2018, 75, 165 -181.
AMA StyleJun Nakatani, Kiyotaka Tahara, Kenichi Nakajima, Ichiro Daigo, Hideaki Kurishima, Yuki Kudoh, Kazuyo Matsubae, Yasuhiro Fukushima, Tomohiko Ihara, Yasunori Kikuchi, Asako Nishijima, Yuichi Moriguchi. A graph theory-based methodology for vulnerability assessment of supply chains using the life cycle inventory database. Omega. 2018; 75 ():165-181.
Chicago/Turabian StyleJun Nakatani; Kiyotaka Tahara; Kenichi Nakajima; Ichiro Daigo; Hideaki Kurishima; Yuki Kudoh; Kazuyo Matsubae; Yasuhiro Fukushima; Tomohiko Ihara; Yasunori Kikuchi; Asako Nishijima; Yuichi Moriguchi. 2018. "A graph theory-based methodology for vulnerability assessment of supply chains using the life cycle inventory database." Omega 75, no. : 165-181.
The future availability of mineral resources has attracted much attention; therefore, a quantitative evaluation of the potential impacts of resource use on future availability is important. Although the surplus cost model is often recommended among the existing endpoint characterization models of mineral resources, it has a shortcoming as it does not consider the changes in future primary resource use. This paper introduces a new characterization model considering future primary resource use changes, due to future changes in total demand and secondary resource use. Using material flow analysis, this study estimated time-series primary resource use for iron and copper for five shared socioeconomic pathways (SSPs) and a constant total demand scenario. New characterization factors, i.e., demand change-based surplus costs (DCSC), are calculated for each resource. In all of the SSPs, the calculated DCSCs are larger than the conventional surplus costs (SC) for both iron and copper. The DCSC, relative to the SC of copper, is larger than that of iron for all of the SSPs, which suggests that the potential impacts of copper use, relative to iron, will be underestimated, unless future primary resource use changes are considered. In calculating DCSC for other resources, it is important to choose an appropriate approach for forecasting future total demands.
Ryosuke Yokoi; Jun Nakatani; Yuichi Moriguchi. Calculation of Characterization Factors of Mineral Resources Considering Future Primary Resource Use Changes: A Comparison between Iron and Copper. Sustainability 2018, 10, 267 .
AMA StyleRyosuke Yokoi, Jun Nakatani, Yuichi Moriguchi. Calculation of Characterization Factors of Mineral Resources Considering Future Primary Resource Use Changes: A Comparison between Iron and Copper. Sustainability. 2018; 10 (1):267.
Chicago/Turabian StyleRyosuke Yokoi; Jun Nakatani; Yuichi Moriguchi. 2018. "Calculation of Characterization Factors of Mineral Resources Considering Future Primary Resource Use Changes: A Comparison between Iron and Copper." Sustainability 10, no. 1: 267.
Jun Nakatani. How Can LCA Studies Contribute to Supply Chain Risk Management? Journal of Life Cycle Assessment, Japan 2018, 14, 255 -255.
AMA StyleJun Nakatani. How Can LCA Studies Contribute to Supply Chain Risk Management? Journal of Life Cycle Assessment, Japan. 2018; 14 (4):255-255.
Chicago/Turabian StyleJun Nakatani. 2018. "How Can LCA Studies Contribute to Supply Chain Risk Management?" Journal of Life Cycle Assessment, Japan 14, no. 4: 255-255.
Qian Zhang; Jun Nakatani; Tao Wang; Chunyan Chai; Yuichi Moriguchi. Hidden greenhouse gas emissions for water utilities in China's cities. Journal of Cleaner Production 2017, 162, 665 -677.
AMA StyleQian Zhang, Jun Nakatani, Tao Wang, Chunyan Chai, Yuichi Moriguchi. Hidden greenhouse gas emissions for water utilities in China's cities. Journal of Cleaner Production. 2017; 162 ():665-677.
Chicago/Turabian StyleQian Zhang; Jun Nakatani; Tao Wang; Chunyan Chai; Yuichi Moriguchi. 2017. "Hidden greenhouse gas emissions for water utilities in China's cities." Journal of Cleaner Production 162, no. : 665-677.
[This corrects the article DOI: 10.1371/journal.pone.0165594.].
Michio Murakami; Jun Nakatani; Taikan Oki. Correction: Evaluation of Risk Perception and Risk-Comparison Information Regarding Dietary Radionuclides after the 2011 Fukushima Nuclear Power Plant Accident. PLOS ONE 2017, 12, e0172248 .
AMA StyleMichio Murakami, Jun Nakatani, Taikan Oki. Correction: Evaluation of Risk Perception and Risk-Comparison Information Regarding Dietary Radionuclides after the 2011 Fukushima Nuclear Power Plant Accident. PLOS ONE. 2017; 12 (2):e0172248.
Chicago/Turabian StyleMichio Murakami; Jun Nakatani; Taikan Oki. 2017. "Correction: Evaluation of Risk Perception and Risk-Comparison Information Regarding Dietary Radionuclides after the 2011 Fukushima Nuclear Power Plant Accident." PLOS ONE 12, no. 2: e0172248.