At the weigh in the height difference between the two and natural size difference was apparent with Nakatani having a a good couple of inches over his challenger.
From what we understand this is likely to be Nakatani's final OPBF title defense before he looks to move on to fighting international opponents and begin his search for a world title fight. Unfortunately however it does appear to be a clear step backwards following very good wins over the likes of Shuhei Tsuchiya, Yoshitaka Kato, Ricky Sismundo and Futoshi Usami in recent bouts. It does however seem almost certain that Nakatani will attempt to score his first stoppage since he defeated Tsuchiya back in July 2013.
For Sumiyoshi this is a huge opportunity to claim a major scalp however we can't see him upsetting Nakatani unless the champion has over-looked the challenger here. It's possible but unlikely given how exceptional Nakatani has looked in recent bouts and what's on the line if he was to win here.
Masayoshi Nakatani looks to keep his unbeaten record and OPBF title as he battles Sumiyoshi
(Image courtesy of http://ameblo.jp/ioka)