A temple of the Jōdo Shinshu Hongan-ji school. The first generation of the Seiki family, Asamitsu, who also participated in the shogunate as a sensei crowd, invited the younger brother of the clan, Shinbutsu, to open. It is said that the name of the temple, the name of the temple, is derived from the name of the law that Asamitsu came to the house and gave it to him. It holds a number of cultural treasures, including the "Shōjo Kanashu", which is said to be the autograph of Kinji, as well as portraits and wooden statues of the morning light, the Mireya Gate, and the Nijomon. At the back of the precinct, where there is a large ginkgo tree and a bronze statue of the saint, there are tombs ranging from the first morning light to the fourth generation Tokihiro.

An ancillary facility of the Kasumigaura City History Museum, which was a relocation of a wealthy local farmhouse from the Edo period, consisting of two buildings: a thatched main building and Itakura, which used to be a grain warehouse.

土浦城の本丸と二の丸の一部を整備した城址公園。堀に囲まれた城の姿が水に浮かぶ亀に見えたことから、この名が付いたという。櫓門[やぐらもん]は江戸時代前期の城郭建築で本丸にある櫓門としては関東唯一のもの。亀城公園の東櫓は博物館付属資料館になっている。