LUNAR-A was a cancelled Japanese spacecraft project that was originally scheduled to be launched in 1995, then delayed to August 2004.
After many delays (primarily due to potential thruster faults),[1] the project was eventually cancelled in January 2007.
Plans called for it to enter an elliptical orbit around the Moon, and deploy two penetrators at an altitude of 40 km on opposite sides of the lunar body.
They were designed to withstand a collision speed of 330 meters per second to deeply penetrate the lunar regolith.
[3] Once the penetrators deployed, the LUNAR-A spacecraft was mission-planned to maneuver to an orbital altitude of 200 km above the lunar surface.