上杉謙信の愛刀群（謙信景光・山鳥毛）
Uesugi Kenshin's Beloved Swords (Kenshin Kagemitsu / Yamatorigake)
Also known as: Yamatorigake Ichimonji; Sword of the God of War's Avatar
Description
Uesugi Kenshin (1530–1578), known as the 'Dragon of Echigo' and the 'God of War,' was the greatest battlefield commander of the Sengoku period — a general who declared himself an avatar of Bishamonten (the Buddhist god of war) and fought not for territory but for 'righteousness' (gi). His sword collection, preserved through the centuries by the Uesugi clan, includes several of the finest named blades of the era. The most celebrated is the Yamatorigake (Mountain-Bird Feathers) — a Fukuoka Ichimonji tachi of the early Kamakura period, now a National Treasure at the Uesugi Museum in Yonezawa, whose hamon's bold, bright chōji patterns resembling mountain-bird feathers made it Kenshin's most treasured weapon. Another celebrated piece, the 'Kenshin Kagemitsu,' links the war-god general to the great Osafune Kagemitsu — the tradition that Kenshin swung a Kagemitsu tachi in his legendary single combat against Takeda Shingen at Kawanakajima (Shingen parrying with his war-fan) is among the most dramatic sword-use legends of the period. In 2018, a proposal to sell the Yamatorigake to Okayama City sparked nationwide controversy and a major crowdfunding campaign by citizens of Niigata Prefecture (where Kenshin ruled), illustrating that even today a single sword can mobilize public passion over questions of cultural heritage, regional identity, and historical memory.
Legends & Stories
The legend of Uesugi Kenshin's swords is inseparable from the legend of the man himself — one of the most dramatic figures in Japanese history. Kenshin's single combat with Takeda Shingen at the Fourth Battle of Kawanakajima (1561) — where, according to tradition, Kenshin rode alone into Shingen's command post and slashed at him with his tachi, and Shingen deflected the blows three times with his iron war-fan, the cuts of which are still said to be visible on the fan's surface — is the most celebrated individual sword-combat episode in the entire Sengoku era. The blade Kenshin swung in that moment (whether the Kagemitsu or the Yamatorigake) thus carries the weight of the defining encounter between the age's two greatest warriors. But Kenshin's relationship with his swords goes deeper than battlefield drama. A devout Buddhist who believed himself to be the avatar of Bishamonten, the Heavenly King of the North and god of righteous war, Kenshin understood his finest swords as the weapons of a god-made-flesh: the Yamatorigake, with its mountain-bird hamon blazing with bright nie, was not a tool of killing but an instrument of divine justice. The legend of his sending salt to his enemy Shingen — 'I fight with swords, not with salt' — captures the ethical philosophy that gave his sword-carrying a moral dimension absent from most warlords: the sword as the instrument of righteousness, not of ambition. That this sword survived four and a half centuries to become the subject of a modern crowdfunding campaign is its own kind of legend — the continuing power of a blade to move people across centuries of change.