Showing 1–15 of 15 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Isuke Imada | Takeda Chemical Industries | 3 |
| 2 | Kunikazu Hiraga | Nihon Nohyaku Co. | 2 |
| 3 | Norio Takahashi | Kabushiki Kaisha Toshiba | 1 |
| 3 | Jituo Yoshida | Kubota | 1 |
| 3 | Yukimasa Kumura | Koa Oil Company | 1 |
| 3 | Tomomasa Mitani | Dainippon Ink And Chemicals | 1 |
| 3 | Honami Tanaka | Koa Oil Company | 1 |
| 3 | Isao Osada | Honda Motor Co. | 1 |
| 3 | Kenji Nogawa | Sumitomo Electric Industries | 1 |
| 3 | Noriyuki Tsuchiya | Koa Oil Company | 1 |
| 3 | Yasunobu Yamaue | Kubota | 1 |
| 3 | Toyohiko Takatsuki | Zojirushi | 1 |
| 3 | Masami Shinomiya | The Ohtsu Tire & Rubber Co. | 1 |
| 3 | Kozo Tanaka | Sumitomo Chemical | 1 |
| 3 | Eiji Kitajima | Koa Oil Company | 1 |