Kawazu Nanataki Falls and Joren Falls — Amagi Mountain Folk Beliefs

According to the Kawazu Town Tourism Association, the local word 'taru' (as in 'Nanadaru,' the seven falls) 'is a precious folk term dating back to the Heian period, rooted in the word tarumiзнa (dripping water), meaning water that drips and falls' (Kawazu Town Tourism Association). A local folk tale tells of three tengu brothers — Mantarō (at Mt Daruma), Manjirō (at Mt Manjirō), and Manzaburō (at Mt Manzaburō) — who slew a great serpent on the Amagi range; the seven tubs used in the battle were cast into the Kawazu River and became the seven plunge pools of the falls (Kei Blog, Origin of the Seven Waterfalls of Amagi). The Amagi mountain range served as a site of Shugendo ascetic practice; the peaks of Manzaburō (1,406 m) and Manjirō (1,299 m) functioned as training grounds for mountain ascetics. The name 'Jōren Falls' derives from the Jōren-ji temple that once stood on the hillside above the left bank of the falls (spider-legend blog).

The Jōren Falls spider-woman legend — in which a jorō-gumo (golden orb-weaver spider spirit) tries to drag a man into the waterfall — combines the supernatural power of waterfalls with feminine danger, enacting the folk motif of the boundary between the human world and the supernatural realm of water (Jōren Falls spider legend blog). Mt Amagi provided the geographical backdrop for Yasunari Kawabata's novella 'The Izu Dancer' (1926), set near the Amagi Pass, which is directly adjacent to the Nanadaru area. The enka song 'Amagi-goe' by Sayuri Ishikawa (1986) used the Shokei Falls as a film location, bringing the waterfall and bridge landscape to national attention. The Michelin Green Guide Japan has awarded Kawazu Nanadaru two stars (Rakuten Travel Guide), establishing the site as a recognised international attraction.

The Kawazu Town Tourism Association maintains the walking path and offers guided access to all seven falls within approximately one hour (Kawazu Town Tourism Association). An autumn 'Amagi-ji Momiji Festival' is held each November. Izu City (formerly Amagi-Yugashima Town) promotes Jōren Falls as 'Izu's finest waterfall' and has developed the surrounding area with a traditional inn, wasabi farm, and visitor facilities. Bronze statues of the dancing girl and traveller from 'The Izu Dancer' stand near Shokei Falls, fusing literary, musical, and natural heritage in a single site.

The autumn colour season (mid-November to early December, Amagi-ji Momiji Festival) and the Kawazu cherry blossom season (February–March) in the surrounding area are the peak periods. During the rainy season, water volume increases dramatically for an impressive spectacle — but take extra care on the wet paths.

The final viewpoint of the Great Falls (Otaki, 30 m drop) at the end of the trail, looking upward, is the classic shot. The bronze statues near Shokei Falls read best in spring or autumn light. Hebi-daru (Snake Falls) has a distinctive form as the water slides in a thin sheet across rock face — ideal for close-up photography. Jōren Falls is most dramatic shot from the rocks at the base of the plunge pool, looking up.

The Kawazu Nanadaru walking path may be closed in heavy rain or high-water conditions. Jōren Falls requires descending a long, steep stone stairway — particularly slippery in wet weather. Both sites involve cliff-edge and gorge-side paths; straying beyond the marked route risks a serious fall.