号ごう室しつMeanings1suffixroom number; apartment numberAttached to a number to indicate a specific room or apartment, e.g. 101号室 (Room 101). Used in addresses, building directories, and hotel rooms.会かい議ぎは302号ごう室しつで行おこないます。The meeting will be held in Room 302.彼かれのアパートは205号ごう室しつです。His apartment is number 205.