I-mode is the name of a service provided by NTT DoCoMo allowing 2nd generation mobilephone (PDC) users access to the Internet, send/receive e-mail, and a multitude of services, sunc as ticket reservation, money transfers and weather information. I-mode is based on packet data, meaning that the users pay per kilobyte, not per minute. I-mode is a less advanced competetor to Wireless Application Protocol.
http://www.nttdocomo.com/