noun
one-seater
Refers to a vehicle, aircraft, or piece of furniture designed for a single person. Common in automotive and aviation contexts.
このスポーツカーはワンシーターなので、荷物はあまり積めない。
This sports car is a one-seater, so you can't carry much luggage.
ワンシーターのソファを部屋の隅に置いた。
I placed a one-seater sofa in the corner of the room.