Masakatsu (written: 正勝, 正克, 傑將, 優治, 征勝, 将勝, 昌克, 昌勝, 必勝 or 政勝) is a masculine Japanese given name. Notable people with the name include:
Abe Masakatsu (阿部 正勝) (1541–1600), Japanese samurai
Masakatsu Aoki (青木 昌勝) (born 1957), Japanese astronomer
Masakatsu Funaki (船木 優治) (born 1969), Japanese mixed martial artist and professional wrestler
Masakatsu G. Fujie (藤江 正克) (born 1945), Japanese academic
Hachisuka Masakatsu (蜂須賀 正勝) (1526–1586), Japanese daimyō
Inaba Masakatsu (稲葉 正勝) (1597–1634), Japanese daimyō
Masakatsu Iwamoto, Japanese artist
Masakatsu Koike (小池 正勝) (born 1952), Japanese politician
Kotozakura Masakatsu (琴櫻 傑將) (1940–2007), Japanese sumo wrestler
Masakatsu Miyamoto (宮本 征勝) (1938–2002), Japanese footballer and manager
Masakatsu Morita (森田 必勝) (1945–1970), Japanese activist
Masakatsu Sawa (澤 昌克) (born 1983), Japanese footballer
Masakatsu Shibasaki (柴崎 正勝) (born 1947), Japanese chemist
Takagi Masakatsu (高木 正勝) (born 1979), Japanese musician
Masakatsu Ueda (上田 将勝) (born 1977), Japanese mixed martial artist
Uemura Masakatsu (植村 正勝) (1535–1592), Japanese samurai
Yūki Masakatsu (結城 政勝) (1503–1559), Japanese samurai
