At Ryogoku, Ekoin temple was built for mourning after the calamity of Meiwa conflagration (100,000 casualties and half of Edo burned) by order of 4th Syogun Ietsuna Tokugawa in 1657.
From 1768 to 1909, Sumo tournament had been held at Ekoin temple until the construction of Ryogoku Kokugikan hall, so there is a stone monument (Chikaraduka) of rikishi (sumo wrestler) to pray for getting the power for young wrestler.
I found the stone statue of Jizo which face was crumbling. It is said that worshipers have been given salt for Jizo after obtaining their wishes. For a long time, stone face has been dameged from the salt, so this Jizo is called “Salt Jizo” (Shio Jizo).