P. japonica may refer to:
Algae Padina japonica, a species of brown alga in the family Dictyotaceae Peyssonnelia japonica, a species of red alga in the family Peyssonneliaceae Polysiphonia japonica, red hair algae, a species of alga in the family Rhodomelaceae
Arthropods Paralomis japonica, a species of king crab Panorpa japonica, the common Japanese scorpionfly, a species in the family Panorpidae Paromola japonica, a species of carrier crab Patanga japonica, a species of grasshopper found in Japan Peridaedala japonica, a species of moth in the family Tortricidae Phyllodesma japonica, a species of moth in the family Lasiocampidae Phyllonorycter japonica, a species of moth in the family Gracillariidae Pollenia japonica, a species of cluster fly in the family Polleniidae Popillia japonica, the Japanese beetle, a species of insect Pseudosasa japonica, the arrow bamboo, a species of bamboo in the family Poaceae Psilogramma japonica, a species of moth in the family Sphingidae Pterolophia japonica, a species of beetle in the family Cerambycidae
Molluscs Philbertia japonica, a species of sea snail in the family Raphitomidae Pterygia japonica, a species of sea snail in the family Mitridae Punctoterebra japonica, a species of sea snail in the family Terebridae
Plants Paeonia japonica, a plant species native of the islands of northern Japan Paris japonica, a species of flowering plant in the family Melanthiaceae Peperomia japonica, a species of plant in the family Piperaceae Phalaenopsis japonica, a species of epiphyte in the family Orchidaceae Phanera japonica, a species of flowering plant in the family Fabaceae Phytolacca japonica, a species of flowering plant in the family Phytolaccaceae Pieris japonica, the Japanese andromeda, a plant species native to eastern Asia and Japan Pogonia japonica, an orchid species occurring from China to Japan Pollia japonica, the yabumyoga, a perennial flower species native to East Asia Polygala japonica, a species of flowering plant in the family Polygalaceae Primula japonica, the Japanese primrose, a species of flowering plant in the family Primulaceae 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
Other Perophora japonica, a species of colonial sea squirt in the family Perophoridae
Synonyms Potanthus japonica, a synonym for Potanthus flavus, a species of butterfly in the family Hesperiidae 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
See also Japonica (disambiguation)