Abstract： Since LIGO detected GW150914, there has been a revolution in the field of astronomy. Japan has been making a lot of contribution to the understanding of gravitational waves. In the end of 2017, a nation-wide project called "Gravitational wave physics and astronomy: Genesis" has been set up which combines the effort of theories, observations and experiments. As an important collaboration institute, Hiroshima University contributes a lot in the field of high energy and optical observations. In this talk, I will introduce the gravitational wave activities in our group, including a CubeSat with good localization under development - CAMELOT, a UV-optical telescope in Tibet - Hinotori and the 1.5m optical-NIR telescope KANATA in East Hiroshima.