Yoshio OISHI is believed to have worshipped Shogun Jizo Bosatsu (Ksitigarbha of winning the battle) as his nenjibutsu (a small statue of Buddha kept beside the person), and to have communicated with his ex-Ako warriors in Kyoto or Osaka.
また、念持仏として大石良雄が、勝軍地蔵菩薩を信仰していたとされ、京阪にいる元赤穂藩の同士と密議を行ったと伝えられる。