Masaharu (written: 雅治, 雅晴, 雅春, 正治, 正春, 匡治, 政治, 政晴, 誠春 or 昌晴) is a masculine Japanese given name. Notable people with the name include:
Masaharu Anesaki (姉崎 正治) (1873–1949), Japanese writer
Masaharu Fukuyama (福山 雅治) (born 1969), Japanese singer-songwriter, musician and actor
Masaharu Homma (本間 雅晴) (1887–1946), Japanese general
Masaharu Ikuta (生田 正治) (born 1935), Japanese businessman
Inoue Masaharu (井上 正春) (1805–1847), Japanese daimyō
Masaharu Iwata (岩田 匡治) (born 1966), Japanese video game composer
Masaharu Kono (河野 雅治), Japanese diplomat
Masaharu Matsushita (松下 正治) (c. 1913 – 2012), Japanese businessman
Masaharu Morimoto (森本 正治) (born 1955), Japanese chef
Masaharu Nagashima (長島 正治) (1929–2010), Japanese dermatologist
Masaharu Nakagawa (House of Councillors) (中川 雅治) (born 1947), Japanese politician
Masaharu Nakagawa (House of Representatives) (中川 正春) (born 1950), Japanese politician
Masaharu Nishi (西 政治) (born 1977), Japanese footballer
Masaharu Satō (佐藤 正治) (born 1946), Japanese voice actor
Masaharu Suzuki (鈴木 正治) (born 1970), Japanese footballer
Masaharu Taguchi (田口 正治) (1916–1982), Japanese swimmer
Masaharu Taniguchi (谷口 雅春) (1893–1985), Japanese philosopher
Masaharu Ueda (上田 正治) (born 1938), Japanese cinematographer
Wachi Masaharu (和智 誠春) (died 1568), Japanese samurai
Masaharu Yamada (山田 政晴) (born 1980), Japanese weightlifter
Yonekura Masaharu (米倉 昌晴) (1728–1786), Japanese daimyō
