Apr, 2019 - Present: Professor, Department of Life Science, Faculty of Science, Gakushuin University | May, 2004 - Mar, 2019: Professor, Graduate School of Agricultural and Life Sciences, The University of Tokyo | Apr, 1996 - May, 2004: Associate Professor, The University of Tokyo Graduate School of Agricultural and Life Sciences | Jun, 1995 - Mar, 1996: Associate Professor , The University of Tokyo Faculty of Agriculture | Aug, 1990 - May, 1995: Assistant Professor , The University of Tokyo Faculty of Agriculture Jul, 1988 - Mar, 1991: Staff Researcher, National Institute of Health, Japan Department of Medical Entomology