Jōrō-Gumo

Jōrō-Gumo is a being of folklore in which a long-lived spider transforms into a beautiful woman to lure men to their doom. According to tradition, it inhabits waterfalls, abandoned temples, and desolate dwellings in mountainous regions. The typical narrative describes the creature assuming human form, drawing men near, then binding them with hair-like silk—either dragging them into the water or ensnaring them in its web to consume their blood and flesh.

Traditions of the "waterfall Jōrō-Gumo" are recorded at several sites: the Jōren Falls in Izu, Shizuoka Prefecture; the Kegon Falls near Nikkō, Tochigi Prefecture; and Kumo-fuchi (Spider Abyss) in northern Shinano, Nagano Prefecture. These accounts persist as local oral narratives and folklore within their communities.

Jōrō-Gumo appears in Toriyama Sekien's *Gazu Hyakki Yagyō* (1776) and is mentioned in early modern collections such as *Taiheikaku Monogatari* and *Shin Chomonshū*. The figure intersects with Buddhist didactic tales and the spider mythology associated with Mount Katsuragi. The creature also belongs to a lineage that includes the Noh play *Tsuchigumo* (Earth Spider), the Kabuki drama *Tsuchigumo*, and Minamoto no Raiko's legendary slaying of the earth spider recorded in the *Kokon Chomon Shū* (scroll 17).

Related spider yokai include the earth spider that Minamoto no Raiko defeated on Mount Katsuragi in Yamato (distinct from the earth spider in the *Nihon Shoki* account of the Jinmu era), the spider burial mound legends of Heian-kyō, and large spider tales from the mountains of Gifu and Aichi. Within the broader genealogy of transforming female beings, Jōrō-Gumo is often placed alongside Kiyohime (serpent), Hashihime (demon woman), and the yuki-onna (snow woman).