noun
shogun's council chamber; Edo castle governmental affairs room
Historical term referring to the room in Edo Castle where the shogun's council of elders (老中) conducted official business.
御用部屋は江戸城の本丸にあった。
The council chamber was located in the main keep of Edo Castle.
老中たちは御用部屋に集まり、幕府の重要政策を協議
The elders gathered in the council chamber to discuss important shogunate policies.
Compound of 御用 (goyō, 'official business') + 部屋 (heya, 'room'), referring to the governmental affairs room in Edo Castle.