If Inoue becomes undisputed in 118 lbs, he will be the first Japanese boxer to be able to unify a certain division. I agree Inoue is a great boxer and a monster of 118 lbs but we never know what awaits him if he goes up in the weight division.
New challenges will bring him more excitement. Next in line will be to try conquering the Super Bantamweight.
A jump from 118 lbs to 122 lbs isn't really that tough to adopt for a boxer like Inoue.
In fact, his body is already capable to fight at 122 lbs with just a bit of extra training. I hope he will get a chance to face those current champions there.