The term "personal watercraft activity" means activity using a vehicle consisting of a suitably modified vehicle body that can be driven by means of balancing and the operation of a steering device, that can be returned repeatedly to an upright position and driven after overturning, that is propelled by a jet pump and driven by an internal combustion engine, and with the lower side of its upper deck measuring not more than four meters in length from the front end to the back end.

Anyone who takes customers to engage in personal watercraft activity or who rents out personal watercrafts shall, before the activity, conduct safety instruction in the activity for the tourists.
The teaching material for the safety instruction of the preceding paragraph shall be prescribed and publicly announced by the water recreation activities management authorities. The content shall include the matters specified in Articles 13 to 15 of these Regulations.

The water recreation activities management authorities shall designate personal watercraft activity zones according to the conditions of each location.　When personal watercraft activity is taking place simultaneously with other water activities at the same location, the water recreation activities management authority must confine the personal watercraft activity to an area of water between two hundred meters and one kilometer offshore as measured from the bank.
The water recreation activities management authority under the preceding paragraph must put up clearly visible signs at the activity zone; the waterway used to access the activity zone from the land shall be at least thirty meters in width and marked by clearly visible signs.
Personal watercraft activity shall not take place at the same time and location as diving, swimming, or other non-motorized water recreation activities.

A person riding a personal watercraft shall wear a safety helmet and a life jacket that is suitable for personal watercraft activity and that has a whistle attached.

Personal watercraft activity shall proceed only in a clockwise direction, and the following rules shall be observed:
1. Meeting oncoming traffic: The two vehicles shall each move to their right and pass each other on their left sides.
2. Crossing paths: The driver of the personal watercraft on the right shall go straight ahead, and the other personal watercraft shall turn toward the right and pass behind the vehicle that is moving straight ahead.
3. Passing from behind: A vehicle overtaking another vehicle that is moving straight ahead shall pass on the left side of the other vehicle, while maintaining a suitable distance and clearly indicating its direction.