An Electric Scooter and an Electromotive kick board are relevant to motorbikes on the Japanese road traffic law. A Japanese driver license is necessary for driving the electric scooter or the electromotive kick board. If you want to drive these motorbikes, please note that the following restrictions are required for using on the road.
1. to install headlights, number plate lights and direction signals.
2. to purchase a necessary automobile insurance.
3. to pay a tax.
4. to obey the traffic law
Reference: Kanagawa Pref. Police Website
https://www.police.pref.kanagawa.jp/mes/mesf5018.htm