Top Inventors at Sumitomo Forestry Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Junichi Imai | 12 |
| 2 | Hiroki Nakashima | 8 |
| 3 | Kunio Kanai | 5 |
| #4 | Hiroki ISHIYAMA | 4 |
| #5 | Masayoshi Nakamura | 4 |
| #6 | Ryo Soda | 3 |
| #7 | Takayuki Masuko | 3 |
| #8 | Yoshinobu Kumakawa | 3 |
| #9 | Kentaro Nakamura | 2 |
| #10 | Azusa SAIKA | 1 |
| #11 | Etsuya Yasui | 1 |
| #12 | Go Matsufuji | 1 |
| #13 | Haruhiro Shigemitsu | 1 |
| #14 | Hiroki Kagei | 1 |
| #15 | Hisayoshi Suda | 1 |
| #16 | Hiroshi Takashima | 1 |
| #17 | Kazuyuki Matsumura | 1 |
| #18 | Kazunori Ushimaru | 1 |
| #19 | Kenichi Kadota | 1 |
| #20 | Kenji Matsune | 1 |
| #21 | Kenji Ogura | 1 |
| #22 | Kenji Umemura | 1 |
| #23 | Kotaro INO | 1 |
| #24 | Kouichi Ohshiman | 1 |
| #25 | Shun Sato | 1 |
| #26 | Takeo Deno | 1 |
| #27 | Takusaburo Ebina | 1 |
| #28 | Taisuke Nagashima | 1 |
| #29 | Tokuma Fukuoka | 1 |
| #30 | Tomo Kakitani | 1 |
| #31 | Tomotake Morita | 1 |
| #32 | Toshio Yasuda | 1 |
| #33 | Yasufumi Ushio | 1 |
| #34 | Yoshikazu Kobayashi | 1 |
| #35 | Yoshiaki Fujimiya | 1 |
| #36 | Mitsuo Asako | 1 |
| #37 | Akira Yamamoto | 1 |