MUSHA is a vertically scrolling shoot 'em up by Compile and was released in 1990. It was released on the Genesis/Megadrive in the US and Japan, but not Europe. It's part of Compile's Aleste series, and had a sequel on the Sega CD, Robo Aleste.
MUSHA is known for being pretty easy as far as shmups go and is a lot of fun. It's kind of a rarity now, and is a popular import title in Europe.
Tropes found in MUSHA: