Hikaru Okuizumi (奥泉 光 Okuizumi Hikaru), born 6 February 1956, is a Japanese novelist. His real name is Yasuhiro Okuizumi.
Hikaru Okuizumi was born in Mikawa, Yamagata Prefecture, and attended high school in Saitama Prefecture, before studying Humanities at ICU in Tokyo. He completed a master's course at the same university, but dropped out midway through his doctoral course. In 1993, he won the Noma Literary Prize for New Writers for the novel, Novalis no Inyō, and the Akutagawa Prize for The Stones Cry Out the following year. The Stones Cry Out has been translated into a number of languages including English and French. Okuizumi started working at Kinki University in 1999, and continues to teach there.
- Novalis no Inyō (1993)
- The Stones Cry Out (Japanese title: Ishi no Raireki) (1993)
- Banal na Genshō (1994)
- Wagahai ha Neko de Aru Satsujin Jiken (1996)
- Plato Gakuen (1997)
- Grand Mystery (1998)
- Chōrui Gakusha no Fantasy (2001)
- The New Journey to the Center of the Earth (2002–2003)
- Modal na Jishō (2005)
- "The black toe" (2008)