Kusari Gama : Ninja goods.
Mei : Mumei (unsigned)
Chain Length : about 220 cm or 86.6 inches
Sicle Length : about 12.8 cm or 5.0 inches
Tsuka Length : about 32.5 cm or 12.8 inches
Era : Edo period.
Special feature: The iron chain and sickle with handle.
Kusari-gama (chained-sickle) is a traditional Japanese weapon that consists of a kama (the Japanese equivalent of a sickle) on a metal chain (Kusari) with a heavy iron weight (Bundo) at the end. Kusarigama is said to have developed during the Muromachi period and used as hidden weapon or for self defence.
AOI art estimation paper