As Hakuren hands them some koban (former Japanese oval gold coin) to get rid of them, Seikichi finds on the wrapping paper of the koban a seal which he carved as a sexton of the Gokuraku-ji Temple.
白蓮が手切れ金に渡した小判の包み紙に清吉が極楽寺の役僧のときに押した刻印があるのがわかる。