Can't top 20 million.
Also all teams that are willing to pay 20 million are allowed to negotiate.
So that means that you have to give him cash AND good will in terms of player development, etc.
The Dodgers went hard for him when he graduated from high school and they had a vocal agreement that he backed out of at the last minute.
The Ham Fighters are probably one of the more careful teams in the NPB when it comes to pitching, but he's still going to come with a lot of millage on the arm.
Think Darvish.
One of the big reasons he stayed in Japan was that the Fighters offered him to pitch AND hit, which is a great way to make MLB teams mad.
In general, Otani hit a bunch as a DH with a 1000 OPS this year, so it's not the worst thing.
However, that means that AL teams will probably be at a huge disadvantage in general, particularly the M's with two DH-types on the roster for the near future.
Otani will probably end up with the Dodgers or Giants, but the NY teams are also possibilities.