Inaba Gō, National Treasure sword in Kashiwabara Museum, Iwakuni, Japan
The Inaba Go sword measures 70.9 centimeters in length with a 2-centimeter curve and exhibits detailed metalwork patterns on its surface.
Forged in 1585 by Go Yoshihiro in Toyama Prefecture, the blade changed ownership from Inaba Shigemichi to Tokugawa Ieyasu for 500 kan of silver.
The transformation from a long sword to a shorter blade by master polisher Hon'ami Kotoku represents the changing requirements of Japanese swordsmanship.
Visitors can examine this National Treasure at the Kashiwabara Museum, which maintains specific temperature and humidity controls for preservation.
The blade features gold-inlaid inscriptions and metallurgical characteristics that demonstrate the technical excellence of Echizen Province smiths.
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