5 yen (4.55 cents) tags by the end of 2005
Japanese Ministry of Economy, Trade and Industry (METI) will work with Hitachi to develop inexpensive RFID tags. Their goals is to develop 5 yen (4.55 cents) tags by the end of next year.
via Nikkei Shimbun, July 23 (in Japanese)
Additional info:
The RFID Weblog