GUNUNG · Japan

Mount Asama

浅間山

Information

Elevation: 2.568 m
Country: Japan (JP)
Location / Range: Perbatasan Prefektur Gunma & Nagano, Honshu (Taman Nasional Joshin'etsu-kogen)
Mountain type: Kompleks stratovolcano sangat aktif — salah satu '100 Gunung Terkenal Jepang'
Volcanic?: Yes — volcano
Coordinates: 36.4000, 138.5167
Difficulty: Menengah — pendakian resmi hanya sampai Maekakeyama (±2.524 m); puncak sejati Kama-yama & kawah dilarang didaki
Best Season: Juni–Oktober bila status vulkanik Level 1; wajib cek peringatan JMA sebelum berangkat
Permits & Rules: Tidak perlu izin, tetapi akses ke jalur Maekakeyama dibuka/ditutup mengikuti tingkat peringatan vulkanik JMA; zona larangan mengelilingi kawah aktif
Hazards: Salah satu gunung berapi paling aktif di Honshu — erupsi eksplosif berkala (terakhir signifikan 2004, 2009, 2019), lontaran batu (ballistics), gas vulkanik, dan zona larangan sekitar kawah

Description

Mount Asama (浅間山, Asama-yama, 2,568 m) is a complex stratovolcano straddling the border of Gunma and Nagano prefectures on Honshu, and one of the '100 Famous Mountains of Japan'. It is among Honshu's most active volcanoes; the 1783 Tenmei eruption devastated villages and left the Onioshidashi lava field, now a geological tourist site. Because the summit crater (Kama-yama) is dangerous and closed, hikers are directed to the secondary peak Maekakeyama (about 2,524 m) on the outer caldera rim—the highest permitted point when the volcanic alert sits at Level 1. The classic route starts from Asamayama-so (Jinba trailhead), passing a volcanic shelter hut before climbing a gravelly ridge to the crater rim, revealing the gaping caldera, the Karuizawa highlands, and the Japanese Alps. Trail access opens or closes according to Japan Meteorological Agency (JMA) alert levels; climbers must check the current status before setting out.

Gallery

Foto bersumber dari Wikimedia Commons — klik untuk memperbesar & lihat sumbernya.

Routes

Loop Kurofu-yama & Tomi (Kurumazaka Pass / Takamine)

Menengah (alternatif saat kawah dibatasi)

±4–6 jam loop

Sirkuit di sepanjang punggungan luar (Sotorin) Asama—melewati Kurofu-yama dan Tomi-no-kashira—yang menjadi alternatif populer untuk menyaksikan kaldera aktif dari jarak aman ketika akses ke Maekakeyama dibatasi oleh status vulkanik. Titik-titik pandang menghadap langsung ke kerucut aktif dan hamparan Onioshidashi, tanpa memasuki zona larangan kawah.

Source

Maekakeyama via Asamayama-so (Jinba)

Menengah (rute puncak resmi saat Level 1)

±6–7 jam pulang-pergi

Rute utama dan satu-satunya jalur puncak yang diizinkan ke Maekakeyama (±2.524 m) di bibir kaldera luar Asama. Berangkat dari titik jalan Jinba dekat Asamayama-so, jalur melewati rumah perlindungan vulkanik (Kazan-kan) lalu menanjak punggungan berkerikil gersang ke tepi kawah. Jalur dibuka hanya saat status peringatan vulkanik JMA berada di Level 1; pendakian ke kawah sejati (Kama-yama) tetap dilarang.

Source

Climbing Experiences

Because Asama's summit crater (Kama-yama) is dangerous and closed, nearly all documented climbs target Maekakeyama (前掛山, about 2,524 m) on the outer caldera rim — the highest permitted point at alert Level 1. The common route leaves from Asamayama-so (Jinba trailhead), passes a volcanic shelter hut, then follows a gravelly ridge to the crater rim. Japanese-language recordings emphasize the trail reopening after alert downgrades, the barren moonscape terrain, and views into the gaping caldera; some film in winter. English content introduces Asama as one of Japan's most active volcanoes and a '100 Famous Mountain'.

References

The summary above is compiled from the following sources. Click to explore them yourself.