| Katsuji Mori | G? Mifune (1967-1968) |
| Michiko Nomura | Mittchi Shimura #2 (1967-1968) |
| Teiji ?miya | Daisuke Mifune (1967-1968) |
| Junko Hori | Kurio Mifune (1967-1968) |
| Kenji Utsumi | Inspector Rokug? (1967-1968) |
| Jack Curtis | Pops Racer/Lionel Racer/Inspector Detector/Announcer/Additional Voices |
| Jack Grimes | Sparky/Wilson Sparkolemew/Chimchim/Additional Voices |
| Yoshiko Matsuo | Mittchi Shimura #1 (1967) |
| Kinya Aikawa | Masked Racer/Ken'ichi Mifune (1967-1968) |
| Ry?ko Kinomiya | Aya Mifune (1967-1968) |
| Kei Tomiyama | Sabu (1967-1968) |
| Hiroshi ?take | Sanpei (1967-1968) |
| Peter Fernandez | Speed Racer/James Racer/Racer X/Additional Voices |
| Corinne Orr | Trixie/Sprytle/Mom Racer/Additional Voices |
