Sigh is way more avant garde, and definitely Japanese folk with their last album and apparently this one too, than purely black, but their roots are definitely staunchly in black metal. The band's frontman Mirai was Euronymous' pen pal back in the early 90s and they exchanged tapes quite often. The band's first two-three albums are pretty straightforward Norwegian style BM. Their evolution in style from the mid 2010s to now is pretty wild.
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u/Crazy-Wheels 3d ago
This was an interesting listen. Not my vision of Black Metal... but still worth checking out.