I don't also see Inoue having issues on 122 lbs, and I think he can bring his power to this division (I hope others will agree with my observation). What I really like about Fulton is his never say die mentality, against Brandon Figueroa, he shows a lot of heart and win that fight in the judges score card. But I don't think he can last against the power of Inoue.
It's for Inoue to show his prowess that he can end matches too quick and his power is really strong that he might get knocked out, not just by luck but by his strength and style.
I think maybe we can base on others who have move up to different divisions and become successful. As someone pointed out, it's just 4 lbs sound, so it's not that huge jump and even us non boxers who gain 4 lbs in the pandemic might not see the difference after all.
So I would also leaning on the premise that Inoue might be good if not better at 122 lbs because his body is going to be fully rehydrated even before the fight and that is a big factor for boxers not needing to drain themselves in weigh-in.
4 pounds is what? I think that's just a little less than 2 kilograms, so I bet Inoue won't be having that much trouble in his climb because the difference isn't that huge. The only challenge for Inoue now that is still considered as a mystery is, how does a natural 122 lbs boxer fight behave and fights inside the ring because we all know here that there's really a difference compared when Inoue's still at 118 lbs.
Some are even saying that it's somehow risky because rather than testing the waters first, Inoue goes directly at a champion. I'd say, I guess we will know it soon.