Kaiseki was born in Taneyama-mura, Yatsushiro-gun in Higo Province (Yatsushiro City, Kumamoto Prefecture of today) as the son of Jihaku HIROSE, a chief priest of Joritsu-ji Temple.
肥後国八代郡種山村（現在の熊本県八代市）の浄立寺住職・広瀬慈博の子に生まれる。