personal watercraft; jet ski; water scooter
Common term for a small motorized watercraft ridden like a motorcycle. Often used generically, though Jet Ski is a trademark.
In summer, more people ride personal watercraft on the lake.
You need to take a course to get a license for a personal watercraft.
Compound of 水上 (on the water) and バイク (bike), a wasei-eigo term for a personal watercraft.