Yes, barely winning wouldn't help his situation at all because he will be just viewed as a regular challenger soon enough and Inoue will be also joining him soon, so it will be a much tougher division. It will be a challenge for him of course as this is a different division and his power might have been affected by the weight climb, but let's see what he can give in this weight class.
The two champions will be surely watching on this fight because they know the noise that Casimero made and that will be an enough reason that he should give his 100% percent in defeating Akaho.
This fight will be on the radar of both champ knowing that this attempt of Casimero moving in this new division will be on chasing the title belt, they will monitoring this fight and see if Casimero will be a big threat for them or it's just another ordinary challenger, I mean, Casimero needs to make this appearance more impactful to his new weight division.
It's more likely to say that if in anyhow he will be facing one of the champ, he will have the chance to win the belt.