It's a game called Samurai Sword, and it's for the Famicom Disk System. It's an adventure game, and it reminds me of Snatcher. There's an english translated ROM of the game out there which I downloaded after hearing of the game's existence. Looks like it can be a fun game, but I think I'll need a walkthrough for this one, just like many of the adventure games I play. I'm a big Capcom fan, and I can't believe I've never heard of this game until now!