Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Jiro Tominaga | Nippon Steel | 2 |
| 1 | Bunichiro Kawasaki | Nippon Steel | 2 |
| 3 | Harumi Kita | Takeda Chemical Industries | 1 |
| 3 | Susumu Otsuka | Mitsubishi Gas Chemical Company | 1 |
| 3 | Nobuyasu Irie | Nippon Steel | 1 |
| 3 | Wataru Shinada | Nippon Steel | 1 |
| 3 | Isao Yata | Nippon Steel | 1 |
| 3 | Shigemi Nagayoshi | Mitsui Coke Co. | 1 |
| 3 | Kyoichiro Matsuoka | Nippon Steel | 1 |