Metsuhō Shell (Metsuhō-gai)Emaki-Accurate Depiction

In texts, the Metsuhō Shell appears solely as an image: an enigmatic shell-dwelling creature that emerges around rivers, marshes, and ponds. Eyes peer from the rim of its shell, and a tail-like appendage sways as if propelling it. Its behavior, malice, and omens are not recorded. Late Edo picture scrolls omit explanatory captions, inviting readers to infer origins from its name and form, and set it alongside other water spirits. The term metsuhō evokes a sense of lawlessness or being out of bounds, but no firm source, orthographic variants, or toponymic links are attested. Accordingly, this entry confines itself to minimal notes based on iconographic traits and extant sources.