A built-in closet (usually with sliding doors) in a room, typically used to store futons and other household items.
押入れに冬用の布団をしまった。
I put the winter futon away in the closet.
古い家の押し入れは天袋があって収納力がある。
Old houses' built-in closets often have a top compartment and a lot of storage space.
子どものおもちゃは押入れの下段に入れておいてください。
Please put the child's toys on the lower shelf of the closet.