N. japonica may refer to: Neadmete japonica, a sea snail species Neoshirakia japonica, a plant species found in Japan and East Asian countries Nerita japonica, a sea snail species Ninox japonica, the Northern boobook, a bird species found in eastern Russia, North Korea, South Korea, northern and central China and Japan Nordstromia japonica, a moth species found in Japan and China Nuphar japonica, an aquatic plant species found in Japan See also Japonica (disambiguation)