Miracle Warriors: Seal of the Dark Lord

Japanese RPG. There are two editions, one for the MSX1 on cassette and one for the MSX2 on 3.5" floppy disk. The seal of the dark lord Terarin has been broken and Terarin has been unleashed on the world again. She has stolen the Golden Seal, opening Pandora's Box and unleashing evil creatures upon the world. A young hero is commissioned by a king to stop Terarin. He must follow in the footsteps of Iason, a shepherd who once accidentally unleashed Terarin and fought to reseal the Dark Lord. The hero must enlist the help of three companions, Guy the warrior, Medi the Amazon and Treo the pirate (called Turo in the manual), and find the three keys to Terarin's lair. To defeat the Dark Lord, they must find the mystical weapons and armor of old, defeat Terarin and banish the Dark Lord from the world.