The Oze Nationalpark is situated in central Honshu and covers an area of 372 square kilometres of the prefectures Gunma, Fukushima and Niigata. The park is famous for the Ozegahara and Ozenuma Swamp as a habitat for a variety of swamp plants and insects.
A part of this area has been protected since 1934 and borders in the east to the Nikko Nationalpark of which it was part till 2007. The Oze Nationalpark opened on 30th August 2007 and at that time the mountains Aizukomagatake (2'132 m), Taishakuzan (2'060 m) and Tasiroyama (1'971 m) were newly included in the park.
The highest mountain within the park is the Hiuchigatake at 2'356 m, other summits are the Shibutsu (2'228 m), Aizukomagatake (2'132 m), Taishakuzan (2'060 m) and the Tashiroyama (1'971 m).
Japan 1938, Nikko Nationalpark, miniaturesheet.
The stamps of the miniaturesheet are showing:
20 sen) Hiuchigatake Volcano within Oze Nationalpark.
The other three stamps of the souvenirsheet are showing places of interest within the Nikko Nationalpark.
2 sen) Chugushi shrine at lake Chuzenji and Nantai Volcano in the background.
4 sen) Kegon Fall (96 metres high).
10 sen) Mihashi bridge over the river Daya-gawa, built 1638.
The four stamps were issued in sheets of 20 stamps as well.