Its exhibition boxing fight. Imho professional boxers care little about it. It is like a part time job for them. Even if Pacman gets robbed, viewers will still get entertained and Pacman gets his huge check. Since the fight will be in Japan, they might make it that "their local fighter wins". But since this isnt a professional fight, Pacman reputation and legacy wont get hurt. Imho the fight will go full distance for fans to have more entertainment, and if Pacman would not dominate, I wont be surprised if it will end by draw
Yes its no bearing fight for professional fighters but for the fans watching it some people take those fight seriously since they are interested to see if Chihiro could able to defeat a legendary in this match up. We know that there would be less physicality in this fight but lots of fans still having a debate because they love to see Pacquiao win or either Chihiro inside of Japanese fans. In terms of individual professional records well nothing will happen to it even if one of them lose since its an exhibition fight.
But for accolades for sure people would remember that Chihiro once defeated a Legendary Pacman if he successfully defeat the legend on their upcoming exhibition match.