Introduction to Okuchenden: It is said to have been built in the early Edo period, with a field-shaped layout. The upper seating room of the main room is also equipped with floor-to-ceiling bookshelves and a ledger layout. The shelf is the famous Duobao style cabinet shelf called "Daigo shelf". It is also known as one of the "three famous shelves in the world" together with the "Kasha shelf" of Shugakuin Rikyu Palace and the "Katsura shelf" of Katsura Rikyu Palace.