P. japonica

P. japonica may refer to:
 * Paeonia japonica, a plant species native of the islands of northern Japan
 * Parasteatoda japonica, a spider species in the genus Parasteatoda found in China, Taiwan, Korea and Japan
 * Patanga japonica, a grasshopper species found in Japan
 * Peyssonnelia japonica, a red alga species
 * Philbertia japonica, a sea snail species
 * Pieris japonica, the Japanese andromeda, a plant species native to eastern Asia and Japan
 * Pleodorina japonica, a colonial green alga species in the genus Pleodorina
 * Pogonia japonica, an orchid species occurring from China to Japan
 * Pollia japonica, the yabumyoga, a perennial flower species native to East Asia
 * Polysiphonia japonica, a red alga species
 * Popillia japonica, the Japanese beetle, an insect species
 * Prunus japonica, the Korean cherry, flowering almond or Oriental bush cherry, a shrub species
 * Pseudotsuga japonica, the Japanese Douglas-fir, a conifer species endemic to Japan
 * Pterygia japonica, a sea snail species

Synonyms

 * Pseudotorynorrhina japonica, a synonym for Rhomborrhina japonica, a beetle species
 * Pterocarya japonica, a synonym for Pterocarya stenoptera, the Chinese wingnut, a tree species originally from Southeast China