- 2010 - 2015 Exercise epidemiological study on relationships of several health outcomes with changes of physical activity, exercise and physical fitness
- 2006 - 2008 Research on circadian variations of biological variables, such as blood pressure, body temperature, etc. in different sleep-wake patternsIV
- 2006 - 2008 Comparative Study on the Risk Factors of L ifestyle-Related-Diaeases of the Residents Living in Hilly Region and Suburban District in Nepal After 20 years
- 2005 - 2006 Assessment of sleeping quality using integrated new chemical index derived from melatonin and D-alanine values
- 2003 - 2005 Research on circadian variations of biological variables, such as blood pressure, body temperature, etc. in different sleep-wake patterns III.
- 2002 - 2003 New approach to tailor-made medical treatment based on the ultra-sensitive assay of melatonin
- 1999 - 2001 Creative functional conversion of food resources with poor utility into alternative medical foods
- 1999 - 2001 Research on circadian variations of biological variables, such as blood pressure, body temperature, etc, in different sleep-wake patterns II
- 1997 - 1998 Twenty-year follow-up study of juvenile hypertensive subjects in Kyushu University
- 1996 - 1998 Research on circadian variations of biological variables, such as blood pressure, body temperature, etc.in different sleep-wake patterns.
- 1988 - 1990 A Statistical Approach for Physical Senility and Its Control.
- 1987 - 1988 Japan-Nepal Health Scientific Expedition -Comparative Epidemiological Studies on the Genesis of Hypertension-
- 1987 - 1987 高血圧発症要因としての食生活の役割に関するネパール住民を対象とした比較疫学的研究
- 1977 - 生理的諸変教の時間生物学的研究
- 1977 - Chronobiological studies in physiological variables
- 日内リズムの同調因子に関する研究
- Studies of synchronizers on circadian rhythms.
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