1,541 m), flows through Oketo and Kunneppu towns and into the Sea of Okhotsk from Kitami City.
[1] Many white-tailed eagles and Steller’s sea eagles that have been designated as protected species by the national government are observed in its basin.
A colony of purple azalea designated as a natural monument by the Hokkaido government and a forest of large-diameter Japanese elm trees along the Muka River, which flows parallel to the Tokoro River, are symbols of the region.
At the Tokoro River Estuary Site, relics, remains of pit-dwellings and tomb pits from the Jomon era have been found.
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