Seven-Branched Sword - Wikipedia

Sword Blade - Shin Megami Tensei IMAGINE Wiki

ArtStation - 8 branched sword

Dark Dragon Blade, Ninja Gaiden Wiki

Dusack, Dark Cloud Wiki

Maybe a hint from possible reference but considering the divine dragon's sword and he comes from the west,sekiro 2 will probably be in korea : r/Sekiro

Japanese sword - Wikipedia

Korean sword - Wikipedia

Seven-Branched Sword - Wikidata

Japanese sword - Wikipedia

Fire and Steel - Seven Branched Sword

Japanese sword - Wikipedia

Fire and Steel - Seven Branched Sword

Seven Branched Sword - Alchetron, The Free Social Encyclopedia

Levin Sword - Fire Emblem Wiki