We collected an undetermined Luzula plant at Mt. Furanodake, Daisetsuzan Mountains, Hokkaido, Japan, which was similar to L. arcuata (Wahlenb.) Sw. subsp. unalaschkensis (Buchenau) Hultén but is distinguishable by the characters of leaves, sheaths, and inflorescences. The unknown plant was identified as L. tundricola Gorodkov ex V.N.Vassil. by referring descriptions and the specimens in the herbarium of the Hokkaido University Museum (SAPS). The species has been recorded in circumpolar areas north of the middle Kuril Islands, Kamchatka, Okhotsk, Siberia, and North America, and this is the first record from Japan. Description of morphology and habitat information based on the Hokkaido plants are provided.