リアシート

noun

rear seat; back seat

Refers to the back seat of a vehicle, especially a car. A straightforward loanword from English.

• 子こ供どもはリアシートに座すわらせてください。

  Please have children sit in the rear seat.

• この車くるまのリアシートは広ひろい。

  The rear seat of this car is spacious.