Translation guide
A lifebuoy is a floating ring or device thrown to a person in water to prevent drowning. In Japanese, the most common term is 救命浮環, but in everyday speech, people often describe it as a 浮き輪 used for rescue.
A ring-shaped flotation device used for water rescue, typically found on boats, docks, or near water.
Standard term for a lifebuoy, used in official contexts, signage, and maritime safety.
救命浮環を投げてください。
Throw the lifebuoy.
船には救命浮環が備え付けられています。
Lifebuoys are equipped on the ship.
In casual contexts, 浮き輪 (swim ring) can be used for a lifebuoy, especially when clarifying it's for rescue. Without context, 浮き輪 usually means a toy pool ring.
浮き輪 alone often means a recreational swim ring. Use 救命浮環 for clarity in serious situations.
あの浮き輪、救命用のだよ。
That ring is a lifebuoy.
Alternative term using ブイ (buoy). Less common than 救命浮環 but understood.
Shortened form of 救命浮環, used in technical or maritime contexts.
浮環を点検する。
Inspect the lifebuoys.
The word 浮き輪 (うきわ) usually means a swim ring for play. If you say 浮き輪 in an emergency, people might not immediately think of a rescue device. Use 救命浮環 for clarity.
彼は救命浮環につかまって助けを待った。
He grabbed the lifebuoy and waited for help.
川岸に救命浮環が設置されている。
Lifebuoys are located along the riverbank.
救命ブイが桟橋に設置されている。
Lifebuoys are installed on the pier.