Seven-Branched Sword - Wikipedia

Seven-Branched Sword - Shin Megami Tensei IMAGINE Wiki

ArtStation - 8 branched sword

Classification of swords - Wikipedia

List of National Treasures of Japan (crafts: swords) - Wikipedia

Seven-Branched Sword, Blue Heater Wiki

Korean sword - Wikipedia

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

divine dragon's seven branched sword : r/Sekiro

Fire and Steel - Seven Branched Sword

Bronze Age sword - Wikipedia

Astra Xiphos, MÄR Wiki

File:Chiljido Seven-Branched Sword (30160767936).jpg - Wikimedia Commons