For Nakzawa the bout will serve as a comeback bout after he suffered an upset defeat to Japanese based Teiru Atsumi. On paper it's an easy comeback-back for a man as highly regarded as Nakazawa, however the 8 rounder will be fought at Featherweight, a weight that Nakazawa has never fought at, with his previous bout being contracted between Super Bantamweight and Featherweight, and he has never won a bout above the 122lb limit.
Although highly regarded, following a solid amateur background, Nakazawa has yet to shine as some suspect he could and has looked a bit fragile recently being dropped by Silvester and Daisuke Watanabe and of course being stopped by Atsumi. It may be that that fragility is due to fighting at Super Bantamweight or it could be that Nakazawa's durability doesn't match his in ring ability.
Whilst Nakazawa will clearly be favoured Leon won't be coming in to this on with much fear. He's been fighting at 126lbs regularly and has even gone up to 130lbs in the past. He hasn't shown the greatest of durability himself, with 10 stoppage losses, but is likely to see this as a chance to extend a 2 fight winning run and take advantage of doubt Nakazawa might hand following his first professional defeat.
Despite this being Leon's Japanese debut it will be his third bout on the road following a couple of bouts in China earlier this year, and his record outside of the Philippines is 1-1, he'll be wanting to advance that to 2-1 and claim a potential OPBF ranking here.
For those interested in watching this one, it will actually be aired live on G+!