Practice JLPTMeaning
蚕 (かいこ, Kaiko) is Kaiko — a Japanese food (insects, land animals, special foods).
What is Kaiko?
Kaiko are silkworms, the larvae or caterpillars of the domestic silkmoth. In Japan, silkworms are usually served as a tsukudani (佃煮), i.e., boiled in a sweet-sour sauce made with soy sauce and sugar.