noun
jet ski; personal watercraft
Refers to the small motorized watercraft ridden like a motorcycle on water. Often used generically in Japanese, though originally a Kawasaki brand name.
夏休みに海でジェットスキーに乗った。
I rode a jet ski at the beach during summer vacation.
彼は自分のジェットスキーを持っている。
He owns his own jet ski.