Go-karting on public road!
Put your costumes on, play some crazy tunes on loud speakers, and drive around your favorite part of town! Expect a lot of pedestrians and drivers take many pictures of you! ;)
Another crazy 'Only-In-Japan' experience!
YOU NEED A DRIVER'S LICENSE THAT IS VALID IN JAPAN!
You need a driver's license that is valid in Japan:  Japanese driver's license (issued/converted in Japan).  International driver's license (issued by a signatory to the 1949 Geneva Convention).  Foreign driver's license (issued in Switzerland, Germany, France, Taiwan, Belgium, Slovenia or Monaco) with JAF translation.  SOFA (Status of Forces Agreement) driver's license.
If you don't have any of the mentioned valid driver's license, please have your driver's license converted to Japanese driver's license.
Please bring (a copy of) your passport if you're using  International driver's license, or  Foreign driver's license with JAF translation.
JAF translation is required if you're using a driver's license issued in Switzerland, Germany, France, Taiwan, Belgium, Slovenia or Monaco.