Mount Eboshi, Mountain summit in Oshika, Aoi-ku, Japan

Mount Eboshi is a 2,726 m peak on the main ridge of the Akaishi Range (Southern Alps), on the border of Oshika in Nagano Prefecture and Aoi-ku in Shizuoka. It stands between Shiomi-dake and Arakawa-dake, east of Mitsufushi Pass, and its north slope above the treeline is covered with creeping pine. The ridge south of the summit is steep and subject to rockfall and weathering.

Mount Eboshi lies on the main ridge of the Akaishi Range (Southern Alps), between Shiomi-dake and Arakawa-dake and east of Mitsufushi Pass. The ridge route runs from Shiomi-dake via Shiomi Hut, Motodani-yama, Mitsufushi-yama and Mount Eboshi to Okoguchi-dake and Arakawa-dake. The Sanpuku Hut below the pass closed from fiscal 2003 because of human-waste disposal problems, and camping is banned throughout except at designated sites.

The name Eboshi comes from the black lacquered hat worn by court nobles and Shinto priests, whose shape the summit is said to resemble. The mountain stands on the main ridge of the Akaishi Range between Shiomi-dake and Arakawa-dake, and the surrounding slopes hold colonies of alpine plants such as Sankayo and Shinano-kinbai.

The usual approach starts from the Shiokawa trailhead or the Torikura forest road, both leading via Mitsushi Pass, where the nearest hut, Mitsushi Pass Hut, stands 1.1 km west of the summit. The summit lies on the main ridge between Shiomi-dake and Arakawa-dake, and camping is banned throughout except at designated sites. The nearest station is Ina-Oshima on the Iida Line.

The summit sits on the main ridge of the Akaishi Range, on the border of Oshika in Nagano Prefecture and Aoi-ku in Shizuoka. The ridgeline south of the top is steep and subject to rockfall and weathering, and the north slope above the treeline is covered with creeping pine where ptarmigan live.