IYoro Keikoku Okukiyosumi Prefectural Natural Park
Yoro Keikoku Okukiyosumi Prefectural Natural Park is a Prefectural Natural Park in southern Chiba Prefecture, Japan. First designated for protection in 1935, the park’s central features are the Yōrō Valley and Kiyosumi Mountains. The park spans the municipalities of Ichihara, Kamogawa, Kimitsu, and Ōtaki.

Address: 
Otaki, Isumi District, Chiba 298-0200, Japan