Hashidate Limestone Cave of Chichibu

A mountain city known for Chichibu Shrine, pilgrimage culture, the December Night Festival and Hitsujiyama Park’s spring moss-pink hillside.

One of the Three Great Icicles of Chichibu (秩父三大氷柱), Ashigakubo features a colossal natural-artificial amphitheater of crystal ice 30 meters high and 200 meters wide, formed by spraying pristine mountain stream water across hillside trees. On Friday, Saturday, and Sunday nights during deep winter, the monumental ice cliff is illuminated by vivid colorful LED light arrays that shift across blue, emerald, amber, and violet tones.

A cool limestone cave in the Okutama mountains reached by a winding mountain road and local bus.

A breathtaking natural ice art phenomenon formed by pure mountain spring water seeping from steep rock cliffs along the Arakawa River in Chichibu. Spans up to 30 meters wide and 8 meters tall, dramatically illuminated by colorful LED lights at night.

Nagatoro Auto Camp Site in Saitama, with access, map location and seasonal planning data for international visitors.

Hikawa Camping Ground, Okutama in Tokyo, prepared with map position, photo, accessibility notes and a month-based planning window.

A large mountain reservoir at Tokyo’s western edge, with dam viewpoints, floating pedestrian bridges and forested shore scenery.

A forested mountain in western Tokyo reached by cable car and walking routes, centred on Musashi Mitake Shrine and trail connections toward waterfalls and rock gardens.