Koji, Kōji, Kohji or Kouji may refer to: Kōji (given name), a masculine Japanese given name Kōji (Heian period) (康治), Japanese era, 1142–1144 Kōji (Muromachi period) (弘治), Japanese era, 1555–1558 Koji orange, a Japanese citrus cultivar Andrew Koji Shiraki (born 1987), singer/songwriter known as Koji Koji, the software that builds RPM packages for the Fedora project Koji, the common name of the fungus Aspergillus oryzae Koji, an interactive content creation tool from GoMeta See also Kojii, music project by Kojii Helnwein Coji-Coji (コジコジ), an anime series sometimes romanized Koji Koji Kōji mold Aspergillus oryzae, a fungus used in East Asian fermentation