Daisen Park is a city park in Sakai, Osaka Prefecture. It is located between Daisen-Kofun (the tomb of Emperor Nintoku) and Misanzai-Kofun (the tomb ofEmperor Richu). Inside the park small kofuns are also dotted around.The history of Daisen Park started in 1925 when it was constructed as an experimental farm land. In 1989, it was listed on “Japan’s 100 Fine CityParks” by the Society for Green Civilization and Parks & Open Space Association of Japan. In the parks are straggling many structures including tea house of Shin-andesigned by renowned Japanese Sukiya style architect of Ogi Rodo, who designed many tea houses through the period from Meiji Era to Showa Era, a Japanese Tsukiyama-type garden with the area of 30,000 square meters, and Sakai City Museum which displays treasure trove from Nintoku-ryo Kofun. The tea ceremony house is registered as the tangible cultural property of Japan.Daisen-Kofun (the tomb of Emperor Nintoku) is a a keyhole shape kofun, called zenpo-koenfun, having one square end and one circular end. This kofun is believed to be the largest zenpo-koen type kofun in Japan. It takes about 50 minutes to walk around the foss. However who is buried is still unknown.