Japonica rhymes with:
chanukah, hanukkah, chanukah, hanukkah, seneca, zeneca, abacha, abadaka, absaraka, africa, america, anjelica, chanukah, hanukkah, indica, ithaca, majolica, nautica, oaxaca, seneca, silica, sunamerica, utica, zeneca
Japonica sounds like:
jabbing, japan's, japanese, japans, javanese, jawboning, jifeng, jiving, josephine's