was a retainer of the Shimazu clan during the Edo period. He served under Shimazu Takahisa and then under Shimazu Yoshihisa. On 1568, he became a Karo for his services. He was known as a skilled commander in the battle. On 1578, Ōtomo Yoshishige attacked Shimazu clan and Arinobu gathered 500 troops to hold ground at Taka Castle. Managing to defend the castle led to a decline in the morale of Otomo's troops. In the battle of Mimigawa that followed, the Shimazu army defeated Otomo who retreated under heavy losses losing commanders like Kamachi Akimori from which it never recovered.