| 摘要 |
PROBLEM TO BE SOLVED: To provide a convenient built-in seat without occupying space. SOLUTION: In a vertical surface W1 of a wall W of a house where a user faces, a front-opened recessed part 2 is provided. A seat body 3 comprising a seat plate 4 where a user is seated, and a support 5 capable of holding the seat plate 4 in a horizontal state as it is fallen forward, and in a vertically raised state is contained in the recessed part 2 to be installed.
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