Masayasu is both a given name and a surname. Notable people with the name include:
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Hotta Masayasu (1848–1911), Japanese politician
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Inaba Masayasu
was a Japanese ''hatamoto'' and ''daimyō'' (feudal lord) of Aono han in Mino Province in Edo period Japan. Masayasu's family was descended from Konō Michitaka.Papinot, Jacques. (2003)''Nobiliare du Japon'' -- Inaba, p. 15 Papinot, Jacques Edm ...
(1640–1684), Japanese feudal lord
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Masayasu Wakabayashi (born 1978), Japanese comedian, television presenter, and actor
{{given name, type=both