Graduating from University of Tokyo in physics and Princeton University in theoretical astrophysics, at Cambridge I am working on high-energy astrophysics to reveal the physical mechanism of black holes: accretion disks and relativistic physics in the vicinity of black holes as well as their large-scale influence and cosmic feedback from supermassive black holes. I have been involved in promoting diversity and academic globalization and supporting the students who pursue higher/overseas education and who suffer from various obstacles in their backgrounds. Moreover, in my life I have been deeply engaged in the following social issues and family health affairs: caregiving problems (full long-term in-home care for those who have chronic/terminal disease such as cancer, Alzheimer's disease and disabilities; lack of medical care, helpers and facilities; an aging population) and multifaceted issues regarding children's education and health. I am profoundly honored to be a Gates scholar. Joining the diverse and interdisciplinary Gates community would significantly help me keep striving to address and ameliorate the serious situations not only domestically but internationally in cooperation with the global Gates scholars.