was daimyà  of Tateyama Domain during late-Edo period Japan.
Inaba Masami was the eldest son of the previous daimyà  of Tateyama Domain, Inaba Masamori. On his father's death in 1820, he succeeded to the head of the Tateyama Inaba clan and the position of daimyà  of Tateyama. In 1862, he was appointed as a Wakadoshiyori in the administration of the Tokugawa shogunate under Shà Âgun Tokugawa Iemochi. He resigned the title in 1864, with instructions to strengthen Japan's naval defenses against the increasing aggressive incursions of foreign black ships, and supported Katsu Kaishà «âÂÂs efforts to create the Kobe Naval Training Center. He was reappointed as a Wakadoshiyori in 1865, and rose to the positions of Rà Âjà «, Commissioner of the Army and Fleet Admiral of the Tokugawa Navy under Shà Âgun Tokugawa Yoshinobu. He held these posts until 1868. However, with the start of the Boshin War, he refused to take an active role against the Satchà  Alliance and went into retirement at Tateyama Castle, turning the domain over to his son Inaba Masayoshi. He died in 1879.
Inaba Masami was married to a daughter of Suwa Tadamichi, daimyà  of Suwa Domain in Shinano Province.