| Inaba Masayoshi | |
| Native Name: | 稲葉正善 |
| Native Name Lang: | ja |
| Birth Date: | 28 July 1848 |
| Nationality: | Japanese |
| Other Names: | Bingo-no-kami |
| Occupation: | Daimyō |
was the final daimyo of Tateyama Domain during Bakumatsu period Japan.
Inaba Masayoshi was the younger son of Ōoka Tadayuki, the daimyō of Iwatsuki Domain, Musashi Province. He was adopted into the Inaba clan as heir to Inaba Masami, the 4th Inaba daimyō of Tateyama Domain. On his Inaba Masami's retirement from public life in 1864, he succeeded to the head of the Tateyama Inaba clan and the position of daimyō of Tateyama. His immediate task was to reconcile the Domain with the new Meiji government. In 1869, he was confirmed as Domain governor, and upon the abolition of the han system in 1871, governor of the short-lived Tateyama Prefecture. He was subsequently made a viscount (shishaku) under the kazoku peerage system.
Inaba Masayoshi had no heir, adopted and the fourth son of Inaba Hisamichi, the last daimyō of Usuki Domain in Bungo Province to carry on the Inaba name.