N. japonica

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