Masahiro is a masculine Japanese given name. Notable people with the name include:
Abe Masahiro (阿部 正弘, 1819–1857), Japanese councillor (Rōjū)
Masahiro Abe (阿部 真宏, born 1978), Japanese baseball player
Masahiro Akimoto (footballer) (秋元 雅博, born 1979), Japanese footballer
Masahiro Akimoto (ski jumper) (秋元 正博, born 1956), Japanese ski jumper
Masahiro Anbe (安部 真弘, born 1983), Japanese artist
Masahiro Ando (footballer) (安藤 正裕, born 1972), Japanese footballer
Masahiro Andoh (安藤 まさひろ, born 1954), Japanese guitarist and composer
Masahiro Araki (荒木 雅博, born 1977), Japanese baseball player
Masahiro Chono (蝶野 正洋, born 1963), Japanese wrestler
Masahiro Endo (遠藤 雅大, born 1970), Japanese footballer
Masahiro Fukuda (福田 正博, born 1966), Japanese footballer
Masahiro Fukasawa (深澤 仁博, born 1977), Japanese footballer
Masahiro Futahashi (二橋 正弘, born 1941), Japanese politician
Masahiro Hamazaki (浜崎 昌弘, 1940–2011), Japanese footballer
Masahiro Hasemi (長谷見 昌弘, born 1945), Japanese racing driver
Masahiro Ikeda (池田 昌広, born 1981), Japanese footballer
Masahiro Imamura (今村 雅弘, born 1947), Japanese politician
Masahiro Inoue (井上 正大, born 1989) actor
Masahiro Ishii (石井 正弘, born 1945), Japanese politician
Masahiro Ishikawa (石川 雅博, born 1990), Japanese footballer
Masahiro Ito (伊藤 暢達), Japanese video game artist
Masahiro Iwata (岩田 昌浩, born 1981), Japanese footballer
Masahiro Kanagawa (金川 真大, born 1983), Japanese murderer
Masahiro Kaneko (born 1991), Japanese footballer
Masahiro Kano (born 1977), Japanese footballer
Masahiro Kawai (川相 昌弘, born 1964), Japanese baseball player
Masahiro Kawasaki (川崎 真弘, 1949–2006), Japanese musician and composer
Masahiro Kazuma (數馬 正浩, born 1982), Japanese footballer
Masahiro Kobayashi (actor) (小林 正寛, born 1971), Japanese actor and voice actor
Masahiro Kobayashi (director) (小林 政広, born 1954), Japanese film director
Masahiro Koga (古賀 正紘, born 1978), Japanese footballer
Masahiro Koishikawa (小石川 正弘, born 1952), Japanese astronomer
Kongō Masahiro (金剛 正裕, born 1948), Japanese sumo wrestler
Masahiro Kono (河野 匡泰), Japanese actor and voice actor
Masahiro Kunda (薫田 真広, born 1966), Japanese rugby union player and coach
Masahiro Kuramoto (倉本 昌弘, born 1955), Japanese golfer
Masahiro Kuranuki (倉貫 匡弘, born 1982), Japanese actor
Masahiro Makino (マキノ 雅弘, 1908–1993), Japanese film director
Masahiro Matsunaga (born 1960), Japanese racing driver
Masahiro Matsuoka (松岡 昌宏, born 1977), Japanese drummer and actor
Masahiro Miyashita (born 1975), Japanese footballer
Masahiro Momitani (籾谷 真弘, born 1981), Japanese footballer
Masahiro Mori (ceramic designer) (森 正洋, 1927–2005), Japanese ceramic designer
Masahiro Mori (森 政弘, born 1927), Japanese roboticist
Masahiro Morioka (森岡 正博, born 1958), Japanese philosopher
Masahiro Motoki (本木 雅弘, born 1965), Japanese actor
Masahiro Nakai (中居 正広, born 1972), Japanese singer, actor and host
Masahiro Nasukawa (那須川 将大, born 1986), Japanese footballer
Masahiro Nojima (野島正弘, born 1971), Japanese baseball player
Masahiro Nonaka (野中 政宏, born 1968), Japanese voice actor
Masahiro Ōhashi (大橋 正博, born 1981), Japanese footballer
Masahiro Okamoto (岡本 昌弘, born 1983), Japanese footballer
Masahiro Ota (born 1970), Japanese footballer
Ōuchi Masahiro (大内 政弘, 1446–1495), Japanese daimyo
Masahiro Sakurai (桜井 政博, born 1970), Japanese video game designer
Masahiro Shimizu (清水 雅広, born 1964), Japanese motorcycle racer
Masahiro Shimmyo (born 1972), Japanese footballer
Masahiro Shinoda (篠田 正浩, born 1931), Japanese film director
Masahiro Sukigara (鋤柄 昌宏, born 1966), Japanese footballer
Masahiro Tabata (田端 正広, born 1940), Japanese politician
Masahiro Takahashi (高橋 昌大, born 1985), Japanese footballer
Masahiro Takamatsu (高松 正裕, born 1982), Japanese judoka
Masahiro Takashima (髙嶋 政宏, born 1965), Japanese actor
Takatsukasa Masahiro (鷹司 政熙, 1761–1841), Japanese court noble
Tamanoumi Masahiro (玉の海 正洋, 1944–1971), Japanese sumo wrestler
Masahiro Tanaka (田中 将大, born 1988), Japanese baseball player
Tokitsuumi Masahiro (時津海 正博, born 1973), Japanese sumo wrestler
Masahiro Usui (碓井 将大, born 1991), Japanese actor
Masahiro Wada (和田 昌裕, born 1965), Japanese footballer
Masahiro Yamada (screenwriter) (山田 正弘, 1931–2005), Japanese screenwriter and poet
Masahiro Yamada (山田 昌弘, born 1957), Japanese sociologist
Masahiro Yamamoto (baseball) (山本 昌, born 1965), Japanese baseball player
Masahiro Yamamoto (kickboxer) (山本 真弘, born 1983), Japanese kickboxer
Masahiro Yamanaka (山中 真尋), Japanese voice actor
Masahiro Yasuoka (安岡 正篤, 1898–1983), Japanese scholar
Masahiro Yoshimura (吉村 昌弘, 1936–2003), Japanese swimmer
