Translation guide
A boater is a person who travels by boat, especially for pleasure. In Japanese, there is no single common word that directly translates 'boater'. Instead, you describe the person based on what they are doing on the boat.
To refer to someone who is on a boat for enjoyment, such as a tourist or day-tripper.
A general, neutral way to say 'a person who is on a boat'. It does not specify the purpose, but context usually makes it clear.
湖で船に乗っている人がたくさんいます。
There are many boaters on the lake.
Specifically a sightseeing passenger on a pleasure boat. Common for tour boats.
遊覧船は遊覧客でいっぱいだった。
The sightseeing boat was full of boaters.
Literally 'a person who plays with a boat'. Emphasizes the recreational aspect. Suitable for rowboats, pedal boats, etc.
週末になると、ボート遊びをする人で湖がにぎわう。
On weekends, the lake is bustling with boaters.
To refer to someone who is driving or rowing a small boat, like a rowboat, canoe, or small motorboat.
Specifically for a person rowing a boat. Use when the action of rowing is important.
ボートを漕ぐ人が岸に向かって手を振った。
The boater waved toward the shore.
Formal term for the operator of a small vessel. Used in official or technical contexts.
小型船の操縦者には免許が必要です。
A boater needs a license to operate a small vessel.
To refer to someone who regularly goes boating as a leisure activity, similar to a 'boating enthusiast'.
Casual term for someone who loves boating. Works well in conversation.
彼は大のボート好きで、毎週湖に行く。
He's a big boater and goes to the lake every week.
A more explicit way to say 'a person whose hobby is boating'. Slightly more formal.
ボートを趣味とする人のためのクラブがあります。
There is a club for boaters.
There is no single Japanese word that corresponds to 'boater'. Using a literal translation like ボーター is not understood. Always describe the person's activity or role instead.