was daimyà  of Tateyama Domain during the late-Edo period Japan.
Inaba Masamori was the eldest son of the previous daimyà  of Tateyama Domain, Inaba Masatake. On the retirement of his father in 1812, he succeeded to the head of the Tateyama Inaba clan and the position of daimyà  of Tateyama. However, while assigned to guard duty at Osaka Castle, he fell ill and died. Inaba Masatake was married to a daughter of Honda Tadashige, daimyà  of Izumi Domain in Mutsu Province. His grave is at the sub-temple of Rinshà Â-in within the grounds of Myà Âshin-ji in Kyoto.