That has been an on going discussion. I see both ways and have done both ways. So they tie the back on first now in Japan? Straps wrapped around the outside?
--Well, I really can't speak for all of Japan, but I can say that at least two good-sized Aikikai dojo in Kumamoto are filled with folks who do. Then again, I also saw plenty of folks from other dojo doing it differently, not to mention other arts as previously mentioned.