個室 こしつ
koshitsu

Noun

1. single (room); room for one; one's own room; private room; private compartment

個室 こしつ予約 よやくしたいのですが?
koshitsuo yoyaku shitai nodesuga
I'd like to reserve a private compartment.
Noun

2. private room (in a restaurant, etc.); private dining room

Noun

3. (toilet) stall