Ogamo

The Ogamo were the oldest-established clan of Hōki Province, tracing their ancestor to Ogamo-nushi, honoured with that title by Emperor Tenji. From Ogamo township of Kume District they served as provincial-office officials and held Iwakura Castle.

In the Genpei War the head Ogamo Suke Motoyasu fought for the Taira, but Minamoto no Yoritomo confirmed his standing in 1192. In 1333 the Ogamo were said to have brought three hundred horsemen to Emperor Go-Daigo at Mount Senjō, though the family appears to have split when Nawa Nagatoshi forced Ogamo Motoyuki's castle to surrender.

Under the Muromachi shogunate they served the Yamana and fought in the Kakitsu Incident of 1441. The clan later lost Iwakura to Amago Tsunehisa, served the Amago and Mōri, and recovered it after the Amago collapsed. In 1600 the Nanjo were dispossessed after Sekigahara, and the Ogamo were ruined and scattered.