G. japonica may refer to: Geoemyda japonica, the Ryukyu black-breasted leaf turtle or Ryukyu leaf turtle, a turtle species endemic to the Ryukyu Islands in Japan Gleditsia japonica, the Japanese honey locust, a tree species in the genus Gleditsia Gymnomacquartia japonica, a tachinid fly species Gyrinicola japonica, a nematode parasite species See also Japonica (disambiguation)