Compared to the current 3G services this new technology dubed 'super 3G' will be more than 10 times quicker.
The group says that this will allow a lot of new services to be offered for cell phones like high-res movie players and games, as well as related content services.
The deal comes as the sector bids to cut manufacturing and development costs as revenues face competition pressures.Docomo said that the first stage of development will be completed by 2007. A date for commercial launch hasn't been set yet.
Existing 3G infrastructure, which has cost mobile phone firms billions in recent years, will need to be upgraded but not replaced.
Source: BBC