The Saiku was a lost palace and its exact location was unknown until 1970 when the land here was being prepared for a housing project. Ancient pottery pieces and remains of building foundations were unearthed.

In fact, local residents for generations had passed down the story of the palace being located here. In 1903, a local group led by the Saiku village headman erected this stone monument from recognize Saiku as the palace site. It wasn't until June 1970 when remains of the Saiku Palace were found in Meiwa.