Super Bantamweight is currently a stacked division with a lot of talent throughout its ranks. Picking the true number one contender in the division is hard and theres arguments for quite a few fighters.
While a few fighters can be considered for me the number one contender in the division is Stephen Fulton who is on an absolute roll right now. He’s 18-0 and has faced good competition throughout his career. Hes fought 7 undefeated fighters or 8 if you count the guy making his debut which is very impressive considering hes only had 18 fights. His last fight with Arnold Khegai has put him into a mandatory position with the WBO so he should be getting a title shot in the future. I think because hes fought some decent fighters and is on an 18 fight win streak right now that hes the true number one contender in the division.
A few others like Ryosuke Iwasa are close but I just don’t think they’ve strung enough victories in a row together to be the number one contender. Iwasa last two wins were versus good opponents and he is mandatory to the IBF title so he’ll get a title shot as well.