Masatoshi (written: 正俊, 正敏, 正利, 昌俊, 昌利, 雅俊, 雅敏, 雅功, 雅年, 真敏 or 允俊) is a masculine Japanese given name. Notable people with the name include:
Masatoshi Abe (阿部 正俊, born 1942), Japanese politician
Masatoshi Akihara (秋原 正俊), Japanese film director
Masatoshi Hamada (浜田 雅功, born 1963), Japanese comedian
Hoshina Masatoshi (保科 正俊, 1509–1593), Japanese samurai
Hotta Masatoshi (堀田 正俊, 1634–1684), Japanese daimyō
Masatoshi Ichikawa (市川 雅敏, born 1961), Japanese cyclist
Ikoma Masatoshi (生駒 正俊, 1586–1621), Japanese samurai and daimyō
Masatoshi Ishida (石田 真敏, born 1952), Japanese politician
Masatoshi Ito (伊藤 雅俊, born 1924), Japanese businessman
Masatoshi Kawahara (川原 正敏, born 1960), Japanese manga artist
Masatoshi Koshiba (小柴 昌俊, born 1926), Japanese physicist
Masatoshi Kushibiki (born 1993), Japanese footballer
Masatoshi Kurata (倉田 雅年, born 1939), Japanese politician
Masatoshi Mashima (真島 昌利, born 1962), Japanese guitarist
Masatoshi Matsuda (松田 正俊, born 1980), Japanese footballer
Masatoshi Mihara (三原 雅俊, born 1988), Japanese footballer
Masatoshi Mizutani (水谷 允俊, born 1987), Japanese footballer
Masatoshi Nagase (永瀬 正敏, born 1966), Japanese actor
Masatoshi Naitō (内藤 正敏, born 1938), Japanese photographer
Masatoshi Nakayama (中山 正敏, 1913–1987), Japanese karateka
Masatoshi Nei (根井 正利, born 1931), Japanese scientist
Masatoshi Ōkōchi (大河内 正敏, 1878–1952), Japanese physicist
Masatoshi Ono (小野 正利, born 1967), Japanese singer-songwriter
Masatoshi Samma (三馬 正敏, born 1977), Japanese slalom canoeist
Masatoshi Shima (嶋 正利, born 1943), Japanese electronics engineer
Masatoshi Shinomaki (born 1946), Japanese judoka
Masatoshi Takeichi (竹市 雅俊, born 1943), Japanese biologist
Masatoshi Toyota (豊田 雅俊, born 1976), Japanese sport wrestler
Usune Masatoshi (うすね 正俊, born 1961), Japanese manga artist
Masatoshi Wakabayashi (若林 正俊, born 1934), Japanese politician
