階下の部屋
Exhibition upstairs.
Exhibition upstairs.
階下へおりてらっしゃい。
Please come downstairs.
上階.
the upper floor(s)
階下へ下りる.
階下の部屋.
the tenants live downstairs
I left my dictionary downstairs.
Someone is waiting for you downstairs.
Who lives in the room below?
a building of which the lower floor is used for shops or offices and the upper floor for living quarters