Kasahara (written: ) is a Japanese surname. Notable people with the surname include:
Erika Kasahara (born 1990), Japanese taekwondo practitioner Hiroko Kasahara (born 1970), Japanese voice actress and J-pop singer Kazuo Kasahara (1927–2002), Japanese screenwriter Kenji Kasahara (born 1975), Japanese entrepreneur Kasahara Kenju (1852–1883), Japanese Buddhologist and Indologist Kunihiko Kasahara (born 1941), Japanese origami master Momona Kasahara (born 2003), Japanese pop singer Rumi Kasahara (born 1970), Japanese voice actress Shigeru Kasahara (born 1933), Japanese wrestler , Japanese hammer thrower Shoki Kasahara (born 1991), Japanese baseball player Shotaro Kasahara (born 1995), Japanese baseball player Sunao Kasahara (born 1989), Japanese football player Takashi Kasahara (footballer, born 1918), Japanese football player Takashi Kasahara (footballer, born 1988), Japanese football player goalkeeper Tokushi Kasahara (born 1944), Japanese historian Yōko Kasahara (born 1939), Japanese volleyball player Yukio Kasahara (1889–1988), leading general in the Imperial Japanese Army Yuri Kasahara, Japanese opera singer