sentences:  When Kokichi's son Rintaro (later to become the famous naval commander Katsu Kaishū) was fifteen, Kokichi retired as family head, passing on that duty to young Rintaro.During his last days, Kokichi wrote an autobiography (one of the few surviving from pre-Meiji Japan) titled "Musui Dokugen" ("Musui's Story"), narrating his life and adventures in a style much like that of the picaresque novel.This book is an excellent description of low life in Edo during the late Tokugawa shogunate.