It was built at the southwest end of the Ninomaru in Ishida Castle as a hiding place (retreat) for the Goshima family, the thirty-fifth generation of Morinari, and was also known as "Okadenyashiki". The design is by Zensho, a monk from Kyoto, and the excursion garden, which mimics the Maruike of Kinkaku-ji Temple, is more enlightened and soothing. Niwashi and Tsukiyama use the lava of Onidake, which also features a large number of subtropical plants, such as bellows and cycads. The garden period is clear, and the buildings are also preserved in one piece, and since it is a garden within one of the few castellates, it is designated as a national famous victory. The heart character in the shape of the letter "heart" is in the pond, which seems to be a turtle who liked the turtle, stones similar to turtles are arranged everywhere, and a camphor tree 840 years old stands on the pond. In the first year of Fumihisa (1861), the phrase of Zensei's resignation, written on the folding screen between the entrances, is stunning. Pretty tortoises are arranged on the cover of nails and parapets in the guest room "Kaminama", while in the living room "Ume no Machi", the design of shoji piers that differ on the left and right, and the plum wallpaper with indigo and gold leaf give a modern feel.