Back before their breakthrough game of Final Fantasy on the NES, Square made a number of smaller games that were often poorly received. Of those games, this is actually one of the better ones. You negotiate missions, visits bars, and equip your robot in a style similiar to the MechWarrior games from FASA. The interface is mostly in english, and the mazes are rendered in pseudo-3D, making this game playable without any real japanese knowledge.
You can find a map and items guide at the HideOut.