In the current world rankings, Kosuke Tomioka is ranked #4 in the IBF and WBO Flyweight rankings, and is also listed at WBA #5 and WBC #22. He moved up 1 place from #5 with the IBF in September 2026.
In the current world rankings, Kosuke Tomioka is ranked #4 in the IBF and WBO Flyweight rankings, and is also listed at WBA #5 and WBC #22. He moved up 1 place from #5 with the IBF in September 2026.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Flyweight | September 2025 | October 2026 | 1 year 2 months |
Time ranked counts distinct months this fighter appears on a rankings list for that division. If they drop out and return later, months off the ranking lists are not included.
