It's good that Casimero is just keeping his mouth shut at this fight.
Maybe he was being advised not to make too many talks and just do all the talking thru his punches in the actual fight. Akaho, on the other hand, is not giving any trash talks too and I'm sure he wasn't like that, and that may be the reason why Casimero is just silent too.
Casimero needs to do his best to win this fight. Still, a long way to go for him to be considered for a big match right now that's why every win is a must.
Not really surprised that this Ryo Akaho is also silent since their fight has been scheduled because Japanese people are known to be polite, courteous and very respectful towards other people. However, Casimero is different, this man is known to be messing with you in the head until the day of the fight. He just never stops talking about anything that sometimes he already looks like a fool, but this time is different. He is now under the radar pouring all his days in training for this fight of redemption.
This is easy to interpret, Casimero has spoken more, and only the fact of having said that after this fight he will fight against Inoue is almost like a provocation given to Akaho, you cannot say or speak more and less in boxing, things, things They are like that, it is also as you say, the Japanese are very gentlemen, they are educational people and do not walk much around what they can and cannot, this is something that in boxing takes into account.
Now, boxing in this case is a weapon with double edge edge edges for casimero, I didn't have to have spoken, I think he speaks more to get excited in the full interview, but it was a mistake, those things should not be said, if Casimero loses, the one who will look bad will be him for everything.
If Akaho is indeed provoked by that then he already have stooped down Casimero's level because he was swayed by that kind of statement. Apart from Casimero's true agenda, he might have said that line purposely to mess Akaho and to think that Casimero is underestimating him because he is already forecasting future fights that isn't yet sure that will come. And just like what you have said, it is always a double edged sword for Casimero and that is his choice.