Uryu Swamp

This high-altitude marsh is located on a lava plateau on the eastern side of Mt. Shokanbetsu, in the western part of Uryu Town under the jurisdiction of the Sorachi Regional Subprefectural Bureau in central-west Hokkaido. It is the source of the Oshirari River, a tributary of the Ishikari River, and at an altitude of 850 meters, there are over a hundred large and small ponds and marshes stretching 2 kilometers east to west and 1 kilometer north to south, and when the snow melts in spring, it becomes a continuous large marsh. Sphagnum moss, sedges, and other marsh plants grow luxuriantly on the peat layer and bloom in July. It is designated as part of the Shokanbetsu-Teuri-Yagishiri Quasi-National Park, and there is a road up to halfway, but it is about a 2-hour walk beyond that. The Uryu Marsh was registered as a Ramsar Convention wetland in 2005.

[Ichiro Kashimura]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

北海道中西部、空知(そらち)総合振興局管内の雨竜町の西部、暑寒別(しょかんべつ)岳の東側中腹、溶岩台地上にある高層湿原。石狩川支流の尾白利加川(おしらりかがわ)の水源となり、標高850メートルの高地に、東西2キロメートル、南北1キロメートルにわたって大小百数十の池沼群があり、春の融雪時は連続した大沼となる。ミズゴケ、スゲ類など湿地性植物が泥炭層上に繁茂し、7月ごろに咲き競う。暑寒別天売焼尻(てうりやぎしり)国定公園に指定され、途中まで車道、その先は徒歩約2時間。なお、雨竜沼湿原は2005年（平成17）に、ラムサール条約登録湿地となった。

［柏村一郎］

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