Hasegawa (written: 長谷川 literally "long valley river") is a Japanese surname. Notable people with the surname include:
Ariajasuru Hasegawa (born 1988), Japanese-Iranian footballer
Hasegawa Katsutoshi (born 1944), Japanese sumo wrestler
Hasegawa Nyozekan (1875–1969), author
Hasegawa Tōhaku (1539–1610), Edo period painter
Hasegawa Yoshimichi (1850–1924), Chief of the Army General Staff
Chihiro Hasegawa (born 1984), Japanese AV idol
Chiyono Hasegawa (1896–2011), Japanese supercentenarian
Hozumi Hasegawa (born 1980), Japanese professional boxer
Itsuko Hasegawa (born 1941), Japanese architect
Jun Hasegawa (born 1986), Japanese model
Kazuhiko Hasegawa (born 1946), Japanese film director
Kazuo Hasegawa (1908–1984), Japanese actor
Kenta Hasegawa (born 1965), former Japanese international football player
Kiyoshi Hasegawa (artist)
Kunihiro Hasegawa, Japanese film director
Machiko Hasegawa (1920–1992), manga artist, famous for Sazae-san
Nobuhiko Hasegawa (1947–2005), table tennis player
Sadao Hasegawa (1945–1999), homoerotic artist
Shigetoshi Hasegawa (born 1968), former Japanese baseball player
Shizuka Hasegawa (born 1988), Japanese voice actress
Suzuka Hasegawa (born 2000), Japanese swimmer
Takejirō Hasegawa, Japanese book publisher
Tsuneo Hasegawa (1947–1991), Japanese mountain climber
Tsuyoshi Hasegawa (born 1941), Japanese historian
Yoshiyuki Hasegawa (born 1969), former Japanese football player
Yu Hasegawa (born 1987), Japanese footballer
Yuya Hasegawa (born 1984), Japanese baseball player
