It is said that after returning to Japan, his name was changed to Senri, but there is also a document that the real name was originally Chisato Sakurai. He entered the Nishisugamo Third Normal Primary School and attended the Ueno Children's Music Academy attached to the Tokyo School of Music from the fourth grade to learn classical piano. After attending the Gyosei Junior and Senior High School, Sakurai entered the Faculty of Political Economy at the Waseda University.