Something I've learned recently is that the kind of loungey melancholic ballad music you often hear as the theme songs to 70s japanese movies/anime/whatever is called 'enka' and is the greatest style of music ever, sorry metal.
While it's on metal archives, I can't honestly pass this off as sufficiently metal-ish like I might, say, Wardruna. Still, good shit if you like hypnotic, albeit simple drums and bagpipes.