This is a post-apocalyptic RPG which first appeared for the PC-8801 system, and was ported to the newer PC-98. You enter a 3D maze and battle monsters in a side-scrolling real-time fight. The intro is in english for some reason, but the game itself is in japanese. Like many ported games, you'll need to throttle down the speed on Anex86 to about 500,000 or so to play it normally.
You can find a weapons guide and maps to all the levels at the Hideout, and a great more detail from this GeoCities site.