There were theories that his birth year was 1210 and his death year 1292, and if it was true, then he was born in Echigo where Shinran was exiled to.
生年は承元4年（1210年）、没年は正応5年（1292年）とする説もあり、そうであれば親鸞配流地の越後で生まれたことになる。