Shiretoko National Park is one of the most remote areas of all Japan.

Shiretoko National Park (知床国立公園 Shiretoko-kokuritsukōen) covers the entirety of the Shiretoko Peninsula (知床半島 Shiretoko-hantō), a remote northeastern corner of the Japanese island of Hokkaido.

Shiretoko is one of the most remote areas of all Japan. The national park has no sizable settlements, and the northern portion of the peninsula does not even have any roads. Peak visiting season is during the short summer season; the park is open all year round, but the conditions in winter can be very harsh.

Sources & more Infos:
Shiretoko National Park on the Japanese island of Hokkaido:
http://en.wikivoyage.org/wiki/Shiretoko_National_Park
http://www.env.go.jp/en/nature/nps/park/parks/shiretoko.html

Hokkaidō (北海道) is the northernmost of Japan's four main islands:
http://en.wikivoyage.org/wiki/Hokkaido

Photo:
Goko Five Lakes, Shiretoko National Park - ("Goko Reflection" by Jpatokal - moved from ja:Image:Goko_Reflection.JPG. Licensed under CC BY-SA 3.0 via Wikimedia Commons)
http://commons.wikimedia.org/wiki/File:Goko_Reflection.jpg#mediaviewer/File:Goko_Reflection.jpg
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Shiretoko National Park is one of the most remote areas of all Japan.