It's pretty well known that JP doesn't want anyone else coming into their servers that isn't a native. Been told stories of those who use English there and get kicked from duties or just flat out ignored. Another issue is that there's a fear that by allowing NA/EU to come visit that it will mess up their market boards or cause a shift in how content is run there. They rely mainly on DF for all content and have a certain expectations for said content.

The odds of us getting cross-region to JP is pretty much slim to none and personally with the way anyone that isn't JP is treated there...I'd rather not go for any reason other than to look at housing designs lol.