The Japan Customs website is: http://www.customs.go.jp/index_e.htm

Additional sources of customs information in Japan:

Ministry of Finance
3-1-1 Kasumigaseki, Chiyoda-ku
Tokyo 100-8940
Japan
Phone: +81/3/3581-4111
www.mof.go.jp/english/tariff/tariff.htm

Customs Counselors System in Japan
Tokyo Headquarters
Phone: 81/3/3529-0700
www.customs.go.jp/zeikan/seido/index_e.htm

Japan Tariff Association
Chibiki 2nd Bldg., 8F.
4-7-8 Kojimachi, Chiyoda-ku, Tokyo 102-0083
Phone: 81/3/3263-7221 Fax: 81/3/3263-7345
www.kanzei.or.jp/english/