Higashi kouzu is sung in the ``Osaka Municipal Song'' as ``from the old days of Takatsunomiya''. The 16th Emperor Nintoku and Empress Iwanohime are enshrined here. According to the Nihonshoki, when Emperor Nintoku looked outside from the capital, he could not see the smoke from the stove. Even in a place near the capital, the people could not prepare food, so he was exempted from the duties for three years and tried to be frugal himself.

The so-called "water god" and "purification land that purifies all impurities" of Oyosami Shrine are derived from the fact that this land was originally surrounded by extremely rich water such as ponds and rivers.
It is this shrine that is considered to have been held in honor of Emperor Nintoku, who was such a benevolent ruler and a local hero. The establishment and history of this shrine are not clear because old documents have been lost, but as indicated on an old map as ``Hirano Shrine, the site of Emperor Nintoku's Omiya'', it was originally ``Hirano Shrine'' or ``Nintoku Emperor Shrine.'' seems to have been called