I had a look at the snapshot of the email this dude has received... From what I can tell, this email is NOT confirming your entry into the Japan Closed BETA ! Why I am saying this ?? Because I have an email exactly like the one in the picture as well, which I got right after signing up with PSN Japan ....
The email is simply confirming you as a user on the PSN Network. Nothing related to Home, let alone an invitation to it .. Notice that it does not say Home anywhere in the picture.
I can offer a snapshot of the email I am talking about tomorrow, if anyone is interested .. and I can also offer its English translation.
Besides, have a look at this webpage: [Register or Login to view links]
If your translate it, it clearly states at the bottom of the page, that the lucky applications will be informed through mail, by the end of August .. not as early as 7th August, as shown in the email