quasi-national park
A type of park in Japan designated by the national government but managed by the prefecture. Less strict than a 国立公園 (national park).
この地域は国定公園に指定されています。
This area is designated as a quasi-national park.
国定公園 is a quasi-national park designated by prefectures with national approval, a specific subtype of the more general 自然公園.
Compound of 国定 (state-designated) and 公園 (park).