Yesterday afternoon we made the Japanese versions of VS/VSTS 2010 and .NET 4.0 Beta 1 available to MSDN subscribers.  In a few days we will also make them more broadly available.  We’re very interested in any feedback you have.

The MSDN subscriber download center is here: http://msdn.microsoft.com/subscriptions/downloads/default.aspx?pv=18:370

Brian