A boarding house that provides a room (and often meals); typically used for students or single lodgers—somewhat old-fashioned.
大学に入ったとき、駅前の下宿屋に部屋を借りた。
When I entered university, I rented a room at a boarding house near the station.
あの下宿屋は朝食付きで、大家さんが親切だ。
That boarding house includes breakfast and the landlady is kind.
下宿屋の規則を守って共同生活をする。
I follow the boarding house rules and live communally.