shutter box; door pocket; built-in case for sliding shutters
Refers to the recessed compartment in a wall or frame where a sliding door or shutter (such as an amado rain shutter) is stored when open. Common in traditional Japanese architecture.
Open the rain shutters and put them away in the shutter box.
The door pocket of this house is built into the wall.
Compound of 戸 (to, 'door') and 袋 (fukuro, 'bag, pouch'), referring to a pouch-like compartment for a sliding door.