Kama-itachi is a name for a wind-borne anomaly found in Edo-period art, essays, and oral lore, referring both to the phenomenon and its alleged agent. It is tied to whirlwinds and chill gusts in northern and mountainous regions, noted for razor-like lacerations when one stumbles on the road, delayed pain or bleeding, and frequent injuries to the legs. Its true nature varies across sources: invisible minor spirits, beasts riding the wind, or acts of deities coexist as explanations. In Shin’etsu it is said to strike those who break calendrical taboos, and in Hida a three-stage action is told. In parts of Chubu and Kinki, the whirlwind itself is called kama-itachi, while Edo essays report beast tracks left after a dust devil. Under regional aliases like Tosa’s “Field Sickle,” funerary tools turned uncanny are blamed for similar wounds. In haiku it settled as a winter season word and a sign of wind-borne calamity. This version limits itself to attested sources, avoids overlinking to specific places or persons, and presents regional types side by side.