Senkoji Temple located inside Senkoji Park is a Buddhist temple of the Shingon sect. According to lore, the temple was built by the famous Buddhist priest Kobo Daishi. The vermillion lacquered main hall is a symbol of Onomichi. There is also an enormous rock called "Tama no Iwa". According to legend, there used to be a gigantic glittering gem on top of the rock that served as a landmark for incoming ships.