If your a AAA member, you might try them. You can also try to contact the Japan Automobile Federation:

http://www.jaf.or.jp/e/index_e.htm

Or perhaps the US Embassy in Tokyo

http://usembassy.state.gov/tokyo/wwwh7125.html

They might know of a web site.
------------------
Michael Steinberg
Editor
BizTrip
http://www.biztrip.com

[This message has been edited by businesstraveler (edited 11-15-2002).]