The most notable change visibly will be that the rankings will be extended from 12 to 15. This will be joined by another notable change that will see world ranked fighters now become eligible for Japanese rankings.
This second part appears to be a controversial move which would see fighters like Hozumi Hasegawa and Takahiro Ao eligible for a domestic ranking and presumably a Japanese title fight.
Whilst we do see some genuine issues with this it could help fill out some of the lesser populated divisions and help establish a higher level of competition amongst some of the tougher divisions.
The move, which will likely be spoken about a lot in Japan is interesting and whilst we can see the positives we can also see the negatives and can understand why some people may not like this change.