Inindo - Way of the Ninja (X68000) (gamerip) (1991)

This is nice, low key, easy listening and somewhat minimalist. Nothing will blow your socks off, but it is quite relaxing and good for working. I personally enjoyed Menu, In a Cave, Gambling Spot, Battle Nobunaga & Ranmaru. Overall, 8.25/10. Worth a listen if you're trying to work on something mindlessly and don't want to get distracted.