Hattori Ryokuchi Park, Urban park in Toyonaka, Japan.

Hattori Ryokuchi Park is a 126.3-hectare park in Toyonaka, Osaka Prefecture, developed from a 1941 air-defense green space plan. It contains more than ten ponds, including Yamaga Pond and Uzuwara Pond, and a circular flowerbed from 1959 whose size matches the infield of Koshien Stadium. The park is almost entirely designated as a scenic area.

An open-air museum within the grounds preserves twelve authentic farmhouses from different Japanese regions spanning the 17th to 19th centuries. These structures display how people lived in traditional Japanese communities.

The park's name combines Hattori, the district, with ryokuchi, a generic term for green space. The Open-Air Museum of Old Japanese Farmhouses, opened in 1956, displays rural buildings from across Japan. The circular flower bed, laid out in 1959 for the Crown Prince's wedding, is about the size of the Koshien Stadium infield.

The park is easily reached through Ryokuchi-koen Station and has plenty of parking available for those arriving by car. Weather and daylight hours can affect your visit, so check opening times before you go.

Near the circular flower bed, a surviving fragment of the Umezuka Kofun remains; this keyhole-shaped burial mound was recorded in a survey in the early Showa era and was destroyed by park construction in 1940 and by the flower bed's creation in 1959.