Honma clan

The Honma clan (本間氏) is a Japanese clan that ruled the province of Sado between the 12th and 16th century.

Yoshihisa Honma was appointed shugodai of Sado in 1185. The clan established its rule from Sawata. The clan gave birth to two new branches, the Hamochi-Honma and the Kawaharada-Honma. Those two branches eventually prevailed over the head clan and opposed each other. Uesugi Kenshin, ruler of the Echigo Province at the time, settled the ongoing conflicts between Hamochi-Honma and Kawaharada-Honma. His death sparked a new rows of hostilities between the two branches, but Uesugi Kagekatsu invaded Sado in 1589, putting an end to the ruling of the clan.