Masato (written: 正人, 雅人, 理人, 眞人, 聖人, 聖仁, 真人, 典人 or 正外) is a masculine Japanese given name. Notable people with the name include:

• Masato (kickboxer) (born 1979), Japanese former welterweight kickboxer, won K-1 WORLD MAX kickboxing tournament in 2003, 2008
• Masato Amada (born 1974), Japanese voice actor
• Masato Furuoya (古尾谷 雅人, 1957–2003), Japanese actor
• Masato Hagiwara (born 1971), Japanese actor
• Masato Harada (born 1949), Japanese film director and actor
• Masato Hatanaka (born 1975), Japanese musician
• Masato Hayakawa (born 1986), Japanese singer and musician
• Masato Ichishiki (born 1971), author of the SD Gundam comics
• Masato Ishioka (石岡 正人, born 1960), Japanese film director and screenwriter
• Masato Jinbo (神保 昌登), Japanese anime director and screenwriter
• Masato Kato (加藤 正人, born 1963), Japanese game developer and scenario writer
• Masato Kawabata (born 1977), professional drifting driver
• Masato Kitera, Japanese diplomat
• Masato Kurogi (born 1989), Japanese football player for Cerezo Osaka
• Masato Mihara (三原 正人, born 1959), Japanese judoka
• Masato Morishige (born 1987), Japanese football player for F.C. Tokyo
• Masato Nakamura (born 1958), member of the band Dreams Come True
• Masato Nakamura (baseball) (中村 真人, born 1982), Japanese baseball player
• Masato Nagai a Japanese anime singer
• Masato Osugi (大杉 誠人, born 1983), Japanese footballer
• Masato Saito (斉藤 雅人, born 1975), Japanese footballer
• Masato Sakai (born 1973), Japanese actor
• Masato Sasaki (佐々木 雅人, born 1992), Japanese footballer
• Masato Tachibana (橘 典人, born 1972), Japanese weightlifter
• Masato Takaki (高木 正人, born 1966), Japanese sailor
• Masato Watanabe (渡辺 正人, born 1979), Japanese baseball player
• Masato Yokoyama (born 1964), perpetrator of the Sarin gas attack on the Tokyo subway
• Masato Yoshii (born 1965), Japanese professional baseball player

Fictional characters

• Masato (Pokémon), known in English as Max, a character in Pokémon and Ash & Pikachu
• Masato Inohara, a character in Little Busters!
• Masato Jin from Tokumei Sentai Go-Busters
• Masato Kusaka of Kamen Rider 555
• Masato Mishima of Kamen Rider Kabuto
• Masato Sanjouin from Sailor Moon
• Masato Wakamatsu of Miyuki
• Masato Yamanobe, a character in the manga Phoenix (Hi no Tori)
• Masato Hijirikawa, a character from the Uta no Prince-sama series.
• Masato Kageura, a character in the manga World Trigger.