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Long Sword (Tachi), the name "Naminohira Yukiyasu" inscribed
Important Cultural Property
(Some of the works of theLong Sword (Tachi), the name "Naminohira Yukiyasu" inscribed)
Length: 72.5cm Curvature: 2.3cm
Kamakura period/13th century
Kyoto National Museum
After the Kamakura period (1185-1333) on through the Edo period (1615-1868), the name of Naminohira Yukiyasu was passed down from generation to generation of sword makers who lived in Naminohira, Satsuma Province (the southern outskirts of present-day Kagoshima City).
This long sword (J., tachi) blade, called "Sasanuki," is a rare example of a blade made by a Kamakura-period Yukiyasu. This famous sword was handed down in the Satsuma area, where it originated. The tip of the blade has a curved edge and has the short, wide blade point known as the "boar's neck" (J., ikubi). The blade itself is deeply curved. A number of features are similar to the Yamato style: the lengthwise ridge of the blade (J., shinogi) is thick, the wood-grain texture of the metal surface consists of lines that are nearly straight and parallel (J., masame), the forging has resulted in discernible fine particles (J., jinie) on the blade's surface and the temper line is straight (J., suguha). This agrees with the local account, according to which Yukiyasu or his ancestor Masakuni came from Yamato.
Black lacquer sword mountings existed from as early as the Heian period (794-1185), but the majority of extant examples are mountings for long swords made for actual use in battle. Along with leather-sheathed swords, these were popular during the Nanbokuchô (1336-92) and Muromachi (1392-1573) periods. This example, made in the Muromachi period, was fashioned to fit the blade made in the Kamakura period by Naminohira Yukiyasu and handed down in the Kabayama family of the Satsuma Domain (in present-day Kagoshima Prefecture). The Shimazu crest, with the character jû (cross shape) enclosed in a circle, is decorated on its metal fitting. A coat of black lacquer, different in quality from that which covers the sheath, was applied to the hilt, which appears to have originally been wrapped.