Of the two fights it's fair to say that Fukuhara is the more well known. He has faced the better competition, achieved more and been involved in the more notable bouts. Those bouts have included the 2009 Rookie of the Year final, an 8 round bout with future world title challenger Yu Kimura, the then debuting Takuma Inoue and a contest with Fahlan Sakkreerin Jr, in fact he held Fahlan to a draw. Notably since losing to Inoue, almost 2 years ago, Fukuhara has gone 3-0-2.
In the ring Fukuhara is a solid fighter. He's not a sensational one but he's certainly a capable one and has shown that with his draw against Fahlan, a draw with Koji Itagaki and a win over Koki Ono.
Although Fukuhara is probably the more well known it's certainly fair to say that Yamamoto isn't a “nobody”, in fact he will be fighting in his second Japanese title fight and his third title fight overall. In his previous Japanese title fight he was widely beaten by Go Odaira whilst he has also lost in a WBC International title fight against Xiong Zhao Zhong. Despite those losses he has actually shown enough talent to prove he can go places and at 24 years old he is improving drastically and now seems to believe in his himself. Although best known for his two high profile losses, he has also won the Rookie of the Year back in 2012.
For both fighters this is a great opportunity to claim their first title and should be a great fight. Although neither is a big name, and neither is viewed as a potential world champion, it is a well matched bout.
From what we've seen both men are well matched. Neither is world class, but neither has shamed themselves when they have stepped up in class and against each other we're expecting a very close one, in fact don't be surprised if this ends in a draw.