Globetrotter Packs and roaming in Japan

I see 2D now have some good roaming packs (Globetrotter) for use in Canada, Ireland, UK and the US. I'm a little worried though that roaming in Japan will cost me $10 per MB!!! Outgoing calls are $3.39 min. When I next head off to Japan late September, is it likely Japan will have been added to those destinations? Spark and VF have roaming agreements in place, but 2D still have a long way to go.