| # | Date | Promotion | Match |
| 1 | 19.01.1974 |  |
IWA World Heavyweight Title Best Two Out Of Three Falls: Strong Kobayashi (c) defeats Bill Watts (16:01) IWE New Year Pioneer Series - Tag 9 - Event @ City Gym in Kawasaki, Kanagawa, Japan |
| 2 | 14.01.1974 | |
IWA World Heavyweight Title Best Two Out Of Three Falls: Strong Kobayashi (c) defeats Bill Watts by DQ [2:1] (18:44) IWE New Year Pioneer Series - Tag 7 - Event @ City Gym in Neyagawa, Osaka, Japan |
| 3 | 30.11.1973 | |
IWA World Heavyweight Title Two Out Of Three Falls: Strong Kobayashi defeats Wahoo McDaniel (c) [2:1] (19:02) - TITLE CHANGE !!! IWE Big Winter Series - Tag 20 - Event @ Korakuen Hall in Tokyo, Japan |
