Top Inventors at Hagihara Industries All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Kazumasa Nakashima | 2 |
| 2 | Keiji Nagato | 2 |
| 3 | Ei Kawaguchi | 1 |
| #4 | Hideo Shiozawa | 1 |
| #5 | Masanobu Sakamoto | 1 |
| #6 | Masuo Yabuki | 1 |
| #7 | Takaaki Miyake | 1 |
| #8 | Toshikazu Tanaka | 1 |
| #9 | Yoshinori Fujii | 1 |
| #10 | Yoshitaka Kunisada | 1 |
| #11 | Yuichi Kaihara | 1 |
| #12 | Michio Okuhira | 1 |