Japonica

Japonica may refer to:
 * Latin for "of Japan"
 * Japonica, a British common name for garden plants of genus Chaenomeles (flowering quince) including Chaenomeles japonica and others
 * Camellia japonica, the common or Japanese camellia
 * Japonica, subgenus of Fritillaria flowering bulbous perennial plants
 * Japonica rice, a major variety of Asian rice
 * Japonica (butterfly), a butterfly genus in the Theclinae subfamily
 * 'Japonica' group, species group of Caenorhabditis nematodes, including Caenorhabditis japonica and others
 * Japonica, an SOE F Section network in the Second World War