Asian nations are currently facing a number of challenges, including environmental degradation and growing societal inequalities, in the course of their rapid economic growth and industrialization. Under such conditions, it is of critical importance to develop appropriate assessment tools with which to comprehensively measure the sustainability status of a region in order to guide its transformation into a sustainable society. This paper proposes a method of sustainability assessment consisting of the three components of environment, resource, and socio-economic with aggregated time-series scores. This method can demonstrate the relative sustainability scores of targeted regions for different time periods, thereby, enabling the comparison of relative sustainability status for different regions over these periods. We carried out a case study of Chinese provinces for the years 2000 and 2005 using the proposed method and confirmed its applicability as the indicative type of sustainability assessment at the regional level, while actually investigating the sustainability status and its chronological changes. The results indicated that aggregate sustainability index scores improved between 2000 and 2005 in most provinces, mainly due to significant improvement in the scores for the socio-economic component, whereas the scores for the environment component deteriorated in some provinces over the study period. Our method proves to be effective in analyzing the relative sustainability status among targeted regions for different time periods in the form of aggregate scores, paving the way for practical applications, such as policy analysis, in the pursuit of a sustainable society.

Bio-coke (BIC) is drawing attention as a coal-coke substitute in industry. Though BIC can be used as a carbon-neutral fuel, its overall benefits, including the environmental impacts associated with its production processes and its merits as an alternative fuel, remain unknown. In this study, we investigate the overall impacts and benefits related to BIC production processes and alternative fuel applications by looking into the case of Takatsuki in Osaka Prefecture, the only commercial BIC plant in Japan. Based on the system boundary set, we calculated CO₂ emissions per ton of BIC associated with its manufacturing and transportation processes to be 1.01 t CO₂. CO₂ emission from electricity consumed in the process was found to be the largest, accounting for 74.7 % of total emission. The analyses also revealed that using one ton of BIC as alternative fuel in industry instead of coal-coke could result in avoiding 2.16 tons of CO₂ emissions, showing a clear environmental benefit. While BIC’s calorific value is almost same as pellet’s, BIC had higher gross margin and energy density than pellet produced in the same facility. These findings enhance the merits of producing BIC from wood biomass and could lead the way to revitalizing forestry in Japan.

In public decisions with long-term implications, decisions of the present generation will affect long-term welfare, including future generations. However, only the present generation is able to participate in such decision-making processes. In this study, we invited “Imaginary Future Generations” (IFGs), as participants in a discussion who take on the role of members of future generations to argue on behalf of their future interests to engage in present-day deliberations among residents of a Japanese town. Through analysis, it was seen that the deliberations among IFGs rose interest in issues that are related to common fundamental needs across generations. While the cognitive aspects of interpersonal reactivity, which measure the reactions of one individual to the observed experiences of another, were seen as useful in arguing for the interests of future generations, it was suggested that the environment for deliberation had a significant impact on the ability to effectively take on the role of members of future generations. Finally, this paper positioned IFGs within the broad context of general rules for good decision-making, based on an analysis of these deliberations and in light of philosophical arguments such as the veil of ignorance by John Rawls.

We conducted a Future Design deliberation workshop on the theme of the “3rd Environmental Master Plan” of Suita City, Osaka Prefecture over four sessions in 2019, with the participation of both city residents and officials of the city government. To condition the deliberations of participants, we adopted the method of Imaginary Future Generations (IFGs) and analyzed its impact on their future vision of the city in 2050, policy options needed to shape that future, and changes in their perceptions. We also investigated how the adoption of IFGs affects the relationships between personal attributes and the changes in their perception. The results of variance analysis and multiple linear regression analysis based on data from the deliberations and questionnaire surveys of participants revealed the following: (1) the content and quality of the 2050 vision of society and policy options conceived from the perspective of the IFGs significantly differed from those conceived from the perspective of the current generations; (2) IFGs heightened certain perceptions, such as “a sense of crisis about the future” and “a shared recognition of goals that are desirable for society as a whole”; and (3) although the degree of “critical thinking”, as a disposition of individuals, influences the heightening of perceptions in decision-making from the perspective of the current generations, when IFGs is adopted, the degree of “critical thinking” seems to be no longer a factor in heightening these perceptions. These findings could be useful for designing mechanisms to facilitate sustainable decision-making that considers the interests of future generations.

To mobilize science and technology for sustainability, it is essential to develop a method for explicitly considering the needs and preferences of future generations in designing research strategies and technology innovations. In this study, we conducted a participatory deliberation experiment on research strategy design of hydrothermal reactions and slag, to analyze whether the adoption of imaginary future generations (IFGs), which is a social system that has been proven to be effective for overcoming shortsightedness and activating futurability of people and society in pursuit of sustainability, could change the direction of research and development (R&D) and thereby innovation. A questionnaire survey was administered to the participants after each deliberation session to verify whether treatments, such as analyzing past R&D initiatives and adopting IFGs in deliberations, would change participants’ perceptions about criteria related to designing R&D programs. The results of the deliberation experiment showed that the contents and ideas of research strategies, such as research visions, methodologies and anticipated benefits, were changed by the adoption of IFGs. The criteria used for designing R&D also altered according to changes in research strategy. The findings showed that adopting IFGs and examining issues from the viewpoint of “futurability” could shift the direction of research agendas and technological innovation. Furthermore, the findings could provide insights into how to design R&D strategies and generate innovations in pursuit of sustainability by reflecting upon the needs of and benefits to future generations.