Inaba Masayasu (稲葉 正休, 1640 – October 7, 1684) was a Japanese hatamoto and daimyō (feudal lord) of Aono han in Mino Province in Edo period Japan.
He served as a page and clerk for some time, before being summoned by the shogunate to oversee irrigation projects in the provinces of Kawachi and Settsu.
In this period, Masayasu's cousin, Inaba Masamichi, held the powerful and highly trusted position of Kyoto shoshidai.
Masayasu's motives remain unknown; but the absence of severe adverse repercussions for his family leaves open the supposition that the shōgun himself was privy to a planned assassination.
[1] Masasayu's relatives and others who were also descendants of Inaba Masanari settled at Yodo Domain (115,000 koku) in Yamashiro province from 1723 through 1868.