Osaki Launch Complex is a rocket launch site at the Tanegashima Space Center on Tanegashima.

The site was originally built for the N-I rocket and was later used for N-II, H-I and J-I launches.

The facility was originally built in the early 1970s to support launches of the N-I rocket and would later receive modifications to support the N-II and H-I. It was extensively renovated in the early 1990s to support the J-I rocket, however it was only ever launched once before the program was cancelled. The Osaki complex was next used in November 1998 for a separation test on a SRB-A, used on the H-IIA launch vehicle.

The site was deactivated in the mid-1990s in favor of the newer Yoshinobu Launch Complex located north of the Osaki Launch Complex.

• List of Yoshinobu Launch Complex launches