Hopefully this doesn't violate any forum rules. I have NO commercial links with this company.
I often see on various fora questions about renting motorcycles for a day or so during a trip to Japan. At last week's TMCS, I saw a booth for Rental 819 (which kind of spells out "bike" in Japanese), so I picked up their English pamphlet in order to post it online for interested folk.
The basic requirements are:
1. Be at least 20 years old.
2. Valid "home" motorcycle license
3. International license
4. Passport
The website is
http://www.rental819.comContact edress is: info@rental819.com
Scanned price list: