* Image is for illustrative purposes only.Mikazuki Munechika
三日月宗近
Also known as: Crescent Moon
Description
Sword Overview
The foremost of the Five Greatest Swords Under Heaven and considered the pinnacle of Japanese sword aesthetics. With blade length of 2 shaku 6 sun 4 bu (approximately 80.0 cm), curvature of 9 bu (approximately 2.7 cm), and width at base of 9 bu 5 rin (approximately 2.9 cm), it presents a stately tachi form. Despite these imposing dimensions, its deep koshi-zori curvature creates an elegant arc full of presence, as if the refined elegance of imperial court culture from the late Heian period were sealed directly within the blade itself. The crescent-moon-shaped uchigoke floating across the blade gives the sword its name. The countless half-moon-shaped light patterns scattered along the blade edge, like a starlit night sky illuminated by moonlight, possess an ethereal beauty that, even after a thousand years, steals the breath of all who behold it.
Craftsmanship and Characteristics
The ground steel displays tightly packed small itamehada grain, with subtle jigane-nie lending a lustrous iron tone. The temper pattern creates an unparalleled landscape of small irregular forms overlaid with uchigoke. The tang is in ubu (original) condition, bearing a two-character signature "Sanjō" carved with a fine chisel. Sanjō Munechika was a sword smith of the late Heian period who resided in Sanjō, Yamashiro Province, and is regarded as the greatest master of the dawn of Japanese sword-making. While Munechika's style is known for its elegance and refined quality, and for establishing the foundation of the later Yamashiro tradition, extant signed works are exceedingly rare. Among these, Mikazuki Munechika stands as the supreme masterpiece.
Provenance
The provenance of this sword traces back to the Ashikaga shōgunal house during the Muromachi period. It is believed to have been possessed by Ashikaga Yoshiteru, the 13th shōgun. Known as the "warrior-swordsman shōgun," Yoshiteru was a master of the blade. When attacked by the forces of Miyoshi Yoshitsugu and the Miyoshi Trio during the Eiroku Disturbance (1565), it is said he drove numerous celebrated swords into tatami mats and fought valiantly. According to one account, Mikazuki Munechika was among the blades on that occasion. It subsequently passed into the possession of Toyotomi Hideyoshi and was later transmitted to the Tokugawa shōgunal house.
Current Location
The Tokugawa household carefully preserved this blade as a renowned treasure of the realm, documented in the Kyōhō Meibuts-chō register. Following the Meiji Restoration, it was transferred to the Tokyo National Museum. Currently, it is regularly displayed in the sword room on the first floor of the main building, serving as a pilgrimage site for sword enthusiasts nationwide. In 2017, during the special exhibition "Swords," Mikazuki Munechika was featured as a centerpiece, drawing such lengthy queues daily that it became a social phenomenon. The renown it commands—recognized by name even among those with no expertise in Japanese swords—stands as testament to its overwhelming significance befitting the foremost of the Five Greatest Swords Under Heaven.
Legends & Stories
## Legend and Anecdotes The traditions surrounding Mikazuki Munechika are as profound and multifaceted as the blade's beauty itself. The "crescent moon" pattern that gives the sword its name is a type of temper line marking formed during hardening. Unlike ordinary temper patterns, Mikazuki Munechika's displays an extraordinary phenomenon: innumerable half-moon shapes of varying sizes emerge along the edge line—unparalleled in known examples. Why this pattern arises remains incompletely understood even among modern sword researchers, and it is conjectured that Munechika may have employed some special forging technique. This phantasmagoric scenery, as though the light of the moon itself dwelt in the blade, is the principal reason the sword has captivated people for a thousand years. ## Into the Hands of Warriors In the Muromachi period, this tachi, transmitted as a treasured sword of the Ashikaga shogun house, was said to be one of the favorite blades of the thirteenth shogun, Ashikaga Yoshiteru. On the nineteenth day of the fifth month of Eiroku 8 (1565), during the Eiroku Incident, when Matsunaga Hisahide and the Miyoshi Three led forces in an attack on Nijō Palace, the Ashikaga Seasonal Records records that Yoshiteru wielded a naginata and, further, rapidly exchanged among numerous celebrated swords as he fought valiantly. While various accounts exist regarding which sword Yoshiteru wielded, the tradition that Mikazuki Munechika was among the blades thrust into the tatami mats is frequently cited as a martial achievement of this tachi. ## Presented to Hideyoshi After Yoshiteru's death, Mikazuki Munechika passed into the possession of Toyotomi Hideyoshi. Having unified the realm, Hideyoshi collected celebrated blades from throughout the nation, and Mikazuki Munechika was said to be held with particular reverence among them. After Hideyoshi's death, it was kept by his principal wife, Kōtai-in (Nene), and following her death, it was presented as a bequest to Tokugawa Hidetada in Kanei 1 (1624). Thereafter it was transmitted as a treasured sword (gosuemono) of the Tokugawa shogun house. ## Storage by the Edo Shogunate In the Kyōhō Meibotsu-chō compiled during the Kyōhō era, the name "Mikazuki Munechika" is recorded and officially recognized as a celebrated object under heaven. ## Modern Era and Present In 1951 (Showa 26), it was designated a National Treasure, and in 1992 (Heisei 4), it was donated to the Tokyo National Museum by Watanabe Seiichirō, its then-owner. Even in modern times, the popularity of Mikazuki Munechika shows no signs of diminishing. In the video game Touken Ranbu, the character Mikazuki Munechika is portrayed as "the fair elder of the Five Great Swords Under Heaven," garnering overwhelming support and creating a social phenomenon in which fans increasingly visit actual exhibitions. The thousand-year-old celebrated blade—Mikazuki Munechika—permitted only to be wielded by rulers of the realm, continues to be the symbol of Japanese sword culture itself.