I was basing on the OP as it stated it will happen in June 15..
Sorry my bad, i thought that this fight is an undercard for that cruiserweight final but as i reviewed the article, this fight has not been scheduled yet but definitely will face each other though.
I'm going to update OP later, sorry for the inconvenience that i may have brought to everybody here.
I did ask about the listing of this fight in sportbetting.io, they said they final date so the reason why they didn't list it. I got excited to see the odds of the fight but the previous post about the odds may not be true. I have been watching the youtube highlights of both fighter and i can see inoue has a chance to win but definitely not that big. He fights with just amateur fighters unlike Donaire.
Good point, he hasn't face a fighter like Donaire and we all know that during Donaire's prime at bantamweight, he demolishes great champions along the way.
So it's really hard to under estimate him even at his age, that's why I was quite surprised to see the current odds.
This is the line shared by @Terence Crawford but until now the market is still unvailable, I keep checking on the link but was not able to see it open yet, I'll definitely place my bet as soon as it's open.