kaya (Torreya nucifera);  Japanese nutmeg tree
 genuine kaya (as opposed to imitation kaya)
 dish of white miso mixed with roasted Japanese nutmeg powder, sugar and sesame seeds, etc.
 shin kaya;  imitation kaya;  any kind of cheaper wood that resembles kaya, used for go and shogi boards
 Thrixspermum japonicum (species of orchid)