Hiyama Prefectural Natural Park was created on 1960-04-20.
The area of Hiyama Prefectural Natural Park is 170.13 square kilometers.
Esan Prefectural Natural Park was created in 1961.
Kasagiyama Prefectural Natural Park was created in 1964.
Akkeshi Prefectural Natural Park was created in 1955.
Hokusetsu Prefectural Natural Park was created in 2001-08.
Okuhino Prefectural Natural Park was created in 1994-12.
Ontake Prefectural Natural Park was created on 1952-03-03.
Kurokamiyama Prefectural Natural Park was created on 1937-07-05.
Hachimandake Prefectural Natural Park was created on 1970-10-01.
Kahadakyō Prefectural Natural Park was created on 1953-10-01.
Irabu Prefectural Natural Park was created on 1995-09-01.
Osuzu Prefectural Natural Park was created on 1958-09-01.