| The amazing Taichi Keaton works on cases around the globe that always lead to adventure! He combines his arsenal of multidisciplinary expertise in investigation, archeology, and survival with his experience as a professor, a Falklands Conflict veteran and a SAS agent to unravel the often dangerous challenges in each riveting episode. |
| Name | Character | Episodes |
|---|---|---|
| Ichiro Nagai | Hiraga Taihei | 39 |
| Kikuko Inoue | 2 | |
| Tamio Ohki | 2 | |
| Rei Sakuma | 1 | |
| Daiki Nakamura | 1 | |
| Atsuko Tanaka | 1 | |
| Hiroshi Kamiya | 1 | |
| Aya Hisakawa | 1 | |
| Mami Koyama | 1 | |
| Akemi Okamura | 1 | |
| Yumi Touma | 1 | |
| Toshiyuki Morikawa | 1 | |
| Hideyuki Tanaka | 1 | |
| Hiromi Tsuru | 1 | |
| Takeshi Aono | 1 | |
| Satomi Korogi | 1 | |
| Gorō Naya | 1 | |
| Emi Shinohara | 1 | |
| Katsuhisa Houki | 1 | |
| Shinji Ogawa | 1 | |
| Iemasa Kayumi | 1 | |
| Akira Ishida | 1 | |
| Shozo Iizuka | 1 | |
| Masashi Ebara | 1 | |
| Hidenari Ugaki | 1 | |
| Kazuyuki Sogabe | 1 | |
| Katsunosuke Hori | 1 | |
| Norio Wakamoto | 1 | |
| Motomu Kiyokawa | 1 | |
| Megumi Urawa | 1 |