The Jizo Bosatsu-zo (statue of Jizo Bosatsu) which deserves to be called the main body of the monument rock has a legend that it was curved to pray for protection from smallpox, and so it has been known as 'Hoso Jizo.'
碑石の本体に当たる地蔵菩薩像は、天然痘除けを祈願して彫られたとの伝説があり、「疱瘡地蔵」の名で知られる。