The list was prepared from my search into http://www.infoseek.co.jp with a keyword of "jomon OR joumon; AND pottery". Some 120 pages hit. From them, I picked up the following.

URLs are confirmed valid as of October 19,2000.

http://www.pref.ishikawa.jp/bunkazai/e-kouko/e-1.htm

http://www.rekihaku.ac.jp/e_zyoosetu/no1/index.html

http://www.ic.nanzan-u.ac.jp/MUSEUM/eng.html

http://www.pref.yamaguchi.jp/e4maizou.htm

http://www.pref.nagano.jp/english/history/genshi/genshi.htm

http://www.minc.ne.jp/cocco/english1/co-a-3.htm

http://www.geology.co.jp/iseki/method-e.html

http://www.glocom.ac.jp/eco/jones/jnt/jhistory.htm

http://www.mmex.or.jp/wnn-c/rekisi/e-rekisi.htm

http://www1.pref.tottori.jp/museum/PermanentEx.htm

Enjoy; have a fun!