SpaceX successfully landed a reusable Falcon 9 rocket on a floating drone ship at sea early Sunday after the vehicle had sent a Japanese communications satellite into orbit.

The California-based company’s eighth launch this year was part of its ongoing effort to re-use costly rocket parts instead of jettisoning them into the ocean.

It was also the fourth time SpaceX has vertically landed a used Falcon 9 rocket aboard a floating platform at sea.