DoCoMo is moving on up to Super 3G, then 4G: DoCoMo seems to have responded to the 3GPP discussions about 100 Mbps cellular networks by 2009 by talking further about its own plans. The company currently has a 3G network running W-CDMA with about 384 Kbps download and 128 Kbps upload. They plan to add HSDPA by March 2006 for 1 to 2 Mbps upload and download.
Then on to Super 3G in the 2007 to 2010 framework which they anticipate providing 100 Mbps down and 50 Mbps of raw speed, which probably translates to something like 15 to 20 Mbps down and 5 to 10 Mbps up. Quite impressive, but they'll be competing against fixed WiMax and 802.11n Wi-Fi clouds by that point. DoCoMo says Super 3G is mostly a software upgrade, which makes it a more feasible migration path.
Finally, starting in 2010, DoCoMo will roll out 4G with 1 Gbps downlink speeds.
It all sounds very pretty on paper, but DoCoMo has managed to execute in the past on high-speed cellular technology that has sounded slightly ludicrously ahead of its time until they launched it.