Where did these music tracks come from?

[JC Bailey]

If you look in the sample game's background music folder you'll find four tracks entitled hosi, kan, sai, and sega. Does anybody know where they actually came from? I don't recall hearing them from any of the King's Field games. I used them in the game I made, Fall of Verdite, and they seem to match the three floors of Verdite Castle perfectly. Perhaps they were placed there by fate? "Sai" in particular, which I used for the second floor, is very memorable, I could listen to it all day.