戸 door

There's one corpse of a KODOMO (子) who was killed by a swinging door.

edo ★★★☆☆

Edo (a period of Japan's history). 江戸時代 (えどじだい) = Edo Period.

family register ★★★☆☆ FP
戸 (door) + 籍 (family register) = 戸籍 (family register)

family register - what Japanese use instead of a social security number for the purpose of verifying their identity.

a well ★☆☆☆☆ FP
井 (well) + 戸 (door) = 井戸 (a well)

cupboard ☆☆☆☆☆ KUNKUN
戸 (door) + 棚 (shelf) = 戸棚 (cupboard)