Also written as: 一万田 鑑実

Head of the Ichimata Clan, which was descended from the third son of Ootomo Yoshinao. He initially served Ootomo Yoshiaki, and after his death in 1550, his son Ootomo Sourin.

Sourin ordered the deaths of Akizane's father Ichimata Akisuke and uncle in 1553, at which point Akizane succeeded as head of the family. He continued to serve Sourin without rancor, and won several battles, making his military reputation. He put down a rebellion by another uncle in 1568 and fought against the Mouri in 1569 at the Battle of Tatarahama. He spent much of his life fighting for Ootomo but was ordered commit suicide in 1588 by Ootomo Yoshimune due to a rebellion of the Ichimata Clan.

Note: Mirage gives the reading of his name as Ichimanda Akizane; "Ichimanda" appears to have replaced "Ichimata" as the favored reading in modern times.