NTT DoCoMo is the company to "DO COmmunications over the MObile Network". It reached 43 million subscribers in Japan, early 2003. This presentation covers the multimedia services over mobile networks and give a glimpse of future directions of mobile multimedia networks and applications. DoCoMo's 2G and 3G mobile networks currently offer mobile visual phones, multimedia mails, and video clip download as well as enhanced "i-mode" services. After introducing the mobile multimedia applications and

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... elated technologies, future challenges and directions beyond the current networks are discussed, taking three keywords: hyper operator network, mobile content, and seamless service.