Mount Ontake

Mount Ontake towers at 3,067 meters over the border of Kiso Town, Nagano Prefecture, and Gero City, Gifu Prefecture, standing as Japan's second-highest independent peak after Mount Fuji and long revered as a sacred mountain. Positioned at the southern end of the Northern Alps while maintaining its distinctive dignity as an independent peak, the mountain commands an overwhelming presence when viewed from its base. Counted among Japan's One Hundred Famous Mountains and extremely significant as an object of mountain faith, the mountain has been drawing pilgrims since the Edo period, when practitioners Kakumei from Kiso and Hogen from Owari opened the path of worship to common people, leading to the formation of Ontake-ko believers throughout the nation. Today, white-clad practitioners still process up the mountain in succession.

Near the summit, peaks including Kengamine (the highest), Tsugiko-dake, Marishi-ten-zan, Mamako-dake, and Ohtaki Peak form a ridge, between which lie five crater lakes formed by past volcanic activity: Ich-no-Ike, Ni-no-Ike, San-no-Ike, Shi-no-Ike, and Go-no-Ike. Notably, Ni-no-Ike at approximately 2,905 meters is known as Japan's highest lake, its milky-white surface infused with volcanic ash mirroring the blue sky and clouds like a fantastical world. San-no-Ike displays a mystical cobalt-blue surface and has long been revered as a sacred site where pure water is drawn. Ridge walking connecting these lakes is one of the greatest attractions of climbing Mount Ontake, offering on clear days a 360-degree panorama where the Northern, Central, and Southern Alps, and even Mount Fuji can be seen at once.

Several routes ascend Mount Ontake: the popular Tanosara Route, Ohtaki Route, and from Gifu's side, the Nigorigawa Onsen Route and Kosaka Route. The Tanosara Route, most heavily used, allows vehicle access to approximately 2,200 meters elevation, enabling a relatively quick ascent to the summit. As a treasure trove of alpine plants, summer brings delicate flowers like Komaatusa, Shinano-kinbai, and Chinguruma along the trail, while beyond the tree line, dwarf pine and rocky terrain showcase both the harshness and beauty characteristic of high mountains. Autumn transforms the mountainsides with crimson foliage, particularly spectacular in the yellow leaves of beech and stone birch around Nigorigawa Onsen.

Conversely, Mount Ontake is an active volcano that caused Japan's worst post-war volcanic disaster in the sudden phreatic eruption of September 27, 2014. The unexpected explosion claimed many climbers' lives, and currently some trails and areas near the summit remain restricted. This tragedy has renewed questions about the importance of volcano information and respect for nature's threats; safety measures including shelter installations and disaster prevention information systems are now in place. Visitors must always check the latest volcanic alert level and come prepared with appropriate measures such as carrying a helmet.

Ancient ascetic paths lead from Mount Ontake's base, where unique faith rituals such as waterfall purification and ritual standing continue today. The branch shrine of Ontake Shrine in Ohtaki and Kiso villages serves as a pilgrimage site visited by many followers and tourists before ascending. The Kiso Ontake Ropeway offers easy access to Iimori Highland Station at 2,150 meters elevation, allowing non-hikers to experience the world above the clouds. The surrounding area boasts hot spring towns and regional cuisine including Kaida Highland soba, Hida beef, and Kiso's hoba-maki, making Mount Ontake a travel destination that combines sacred mountain pilgrimage with hot spring therapy and culinary delights—a mountain that leaves a quiet but lasting impression on the heart.