Just in time for this weekend's PlayStation Vita launch, NTT DoCoMo, the official 3G provider for the device in Japan, has announced a low priced monthly 3G service plan. Priced at ¥1,580 per month, the plan supports 128kpbs uploads and 64kbps downloads. DoCoMo says that it's primarily meant for low bandwidth activities like checking e-mail, checking social network services and conducting searches.

As with all plans from DoCoMo, the new plan is usable on non Vita devices as well. In fact, it's actually meant to be a replacement for an older 64kbps/64kpbs plan, which will go out of service in early 2013. However, in its press release announcing the plan today, DoCoMo did specifically mention Vita support, suggesting that the announcement may have been timed for the Vita launch on the 17th.

DoCoMo provides a number of wireless plans besides this, including pre-paid and monthly fixed rate plans. We previously detailed a pricier ¥5,460 monthly plan which has faster 14Mbps download/5.7Mbps upload speeds. For those who want to pay-as-they-go, DoCoMo also offers 20 hour and 100 hour pre-paid cards at the low 128kbps download/64kbps upload speeds (these are the plans that Sony announced at the Tokyo Game Show -- you'll find details here).

The new 128K plan will be offered starting March 1, 2012.