Hiroshi Kobayashi, the Japan boxer, is not listed in the latest monthly rankings, but has previous ranking records, with the latest entry from November 1971 in the Super Featherweight division.
Summary from monthly sanctioning-body lists in our database (not a fight record).
| Division | First entered rankings | Most recently in rankings | Time ranked |
|---|---|---|---|
| Super Featherweight | October 1967 | November 1971 | 3 years 3 months |
| Featherweight | August 1965 | September 1967 | 1 year 5 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.
