Sado Yahiko Yoneyama Quasi National Park

Sado-Yahiko-Yoneyama Quasi-National Park (佐渡弥彦米山国定公園, Sado-Yahiko-Yoneyama Kokutei Kōen) is a Quasi-National Park in Niigata Prefecture, Japan. Designated on 27 July 1950, it has an area of 29,364 ha. It is rated a protected landscape (category V) according to the IUCN.

Like all Quasi-National Parks in Japan, the park is managed by the local prefectural governments.