| 2008 Top League Challenge Series | |
|---|---|
| Countries | Japan |
| Date | 27 January – 10 February 2008 |
| Champions | Kintetsu Liners (1st title) |
| Runners-up | Yokogawa Musashino Atlastars |
| Promoted | Kintetsu Liners Yokogawa Musashino Atlastars |
| Matches played | 6 |
The 2008 Top League Challenge Series was the 2008 edition of the Top League Challenge Series, a second-tier rugby union competition in Japan, in which teams from regionalised leagues competed for promotion to the Top League for the 2008–09 season. The competition was contested from 27 January to 10 February 2008.
Kintetsu Liners and Yokogawa Musashino Atlastars won promotion to the 2008–09 Top League, while Mazda Blue Zoomers and World Fighting Bull progressed to the promotion play-offs.