Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Seven-Branched Sword, also known as the Seven-Pronged Sword, the Seven-Branched Knife, the Seven-Pronged Spear, Nanatsusaya no Tachi in Nihon shoki, Chiljido in Korea is a 74.9 cm long iron sword with six branch-like protrusions along the central blade, designated one of the National Treasures of Japan. The original sword is currently housed in the Isonokami Shrine in Nara Prefecture of Japan and not shown to the public. Replicas are displayed throughout the country and in South Korea. An inscription on the side of the blade is an important source depicting the relationships between the East Asian countries of the period. The blade of the sword is 65.5 cm and the tang is 9.4 cm long. There is no hole on the tang to fasten the sword with a hilt. The sword is broken at the top of the tang. Analysis of the broken surface shows the material of the sword is forged mild steel.

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