Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Hideaki Souma | Save The Planet Co. | 2 |
| 2 | Noboru Okuyama | Nippon Steel | 1 |
| 2 | Hironobu Arashima | The Japan Steel Works | 1 |
| 2 | Satoru Ohsaki | Denso | 1 |
| 2 | Akira Otaki | Mitsubishi Heavy Industries Engine & Turbocharger | 1 |
| 2 | Rinzo Kayano | The Japan Steel Works | 1 |