G. japonica

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