Some of his manga have been based on his life and its events; for example, his grandfather was a Yakuza and his father used to be a pig farmer with a spider tattoo on his back.
Пейзажи и сюжеты некоторой манги (например, "Panorama of Hell") основаны на событиях жизни автора, например, его дедушка на самом деле был якудза.