Sadly we don't have the weights fro the weight in though both men looked in condition for their bout in Thailand.
For the world ranked Hosokawa this is a must win bout. A win for him should help boost his IBF ranking and may in fact help him in to the divisional top 10, helping him to a world title fight in 2015. A loss however for the Japanese fighter will almost certainly see him dropping out of the IBF world rankings. As for Seran a win here could see him breaking in to the fringes of the IBF top 15 though the win for him would be very unexpected and would certainly be his most notable win to date.
(Image courtesy of Toshiaki Nishioka's blog)