Top Inventors at Tokyu Construction Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Kazuko Ishimaru | 2 |
| 2 | Shinji Ishimaru | 2 |
| 3 | Takahiro Niiya | 2 |
| #4 | Chikashi Kami | 1 |
| #5 | Junichi Tanoi | 1 |
| #6 | Kosei Fukuda | 1 |
| #7 | Manabu Ishikawa | 1 |
| #8 | Masao Kawamura | 1 |
| #9 | Masakazu Okada | 1 |
| #10 | Masaru Tateyama | 1 |
| #11 | Shigeru Yoshida | 1 |
| #12 | Takaharu Kawase | 1 |
| #13 | Tetsuhisa Minami | 1 |
| #14 | Tetsu Nishioka | 1 |
| #15 | Yukihiko Tamura | 1 |
| #16 | Munehiro Ohshiro | 1 |