シートベルト

しーとべると
noun
seat belt; seatbelt
transportation
1. seat belt; safety belt in a vehicle
A safety harness worn in a vehicle to secure the occupant in their seat. Legally required for drivers and passengers in Japan.
シートベルトを締(し)めてください。
Please fasten your seat belt.
シートベルトの着用(ちゃくよう)は法律(ほうりつ)で義務付(ぎむづ)けられている。
Wearing a seat belt is required by law.
You must always wear a seat belt even in the back seat.

From English "seat belt." Loanword used universally in Japan.

Common collocations