Of the two men it's fair to say that Yoshino has been the one getting the the more attention during his career. He was a former amateur standout who has been on the fast track since beginning his professional career, which began in 2015, and has already seen him defeat the likes of Chaiyong Sithsaithong, Kenta Onjo and Yoshitaka Kato, three very good opponents for such a novice.
In the ring Yoshino is a fighter who has got amateur skills to rely on, but can also brawl and fight. When he's needed to box, such as against Kato, he's done that whilst he has also been able to brawl with the likes of Onjo. During his short career he has shown good stamina, having already gone 6 and 8 rounds, solid power, good speed and a very good boxing IQ. As with many novice professionals there is a lot left for him to prove before we begin to talk about world title bouts, but from what we've seen it's obvious that the potential is there for Yoshino to go very far, if his mind stays on the sport.
It is worth noting that the 26 year old did walk away from the boxing once before, long before turning professional, and he has questions to answer about his commitment to boxing. He also has to answer questions about hos serious he is, having began his career at Welterweight before dropping down the weights. He's gone about it properly, but there is perhaps a possibility that a fully committed Yoshino would be fighting at Super Featherweight and not Lightweight.
Aged 34 Matsushita is pretty much in a must win situation, as he's almost certainly not going to be getting another shot at a title, if he comes up short here. It is worth noting that this is actually his second title fight in less than a year, though he did come up very short in his previous title fight losing a decision to Chinese hopeful Can Xu. Notably that loss was the first clear fight, win or loss, that Matsushita has had since a 2013 stoppage loss to Jun Hamana.
The trouble with Matsushita is almost every fight he has had has been close. He lacks the power to stop opponents, with just two stoppages, and the skill that he possess have rarely been significantly better than those he has faced. Going through his record shows this with bizarre regularity, including 7 split decisions, in which he has won 3, lost 3 and drawn one, 2 majority decisions, both wins, and a further 9 bouts which could be considered razor thin either way. He's a battler at heart, and that will to battle, has kept him in bouts he should have lost by wider scores, but has also shown a reliance on fighting hard, rather than smart.
Given his age and frustrating career it's hard to see what Matsushita has to really challenge Yoshino, who we think will really shine here, and will see off the veteran, likely sending him into retirement, in the middle rounds here. Matsushita might have some early moments but his lack of power and limited skills are made to order for a fighter like Yoshino, who is going to be too quick, too strong, too hungry and simply too good.