Handled Slender Copper Sword

Hilted Slender Bronze Sword: A 2,200-Year-Old Treasure from the Western Edge of Honshu

On a remote peninsula jutting into the Sea of Japan at the northwestern tip of Honshu, a single bronze sword once lay buried beneath a stone pagoda. Discovered by chance after a typhoon collapsed a cliff in 1901, this slender weapon is now recognized as one of only five examples of its kind ever found in Japan. The Hilted Slender Bronze Sword (Yūhei Hosogata Dōken), excavated from the Ōyashiki Site on the Mukatsuku Peninsula in Nagato City, Yamaguchi Prefecture, offers a remarkable window into the Yayoi period and the long-distance cultural exchanges that linked the Japanese archipelago with the Korean peninsula and the Asian continent more than two millennia ago. After more than thirty years away from public view, the sword has now returned to its home region for a landmark exhibition, giving visitors a rare opportunity to encounter this masterwork of ancient bronze craftsmanship.

An Accidental Discovery in Mukatsuku

The story of the Hilted Slender Bronze Sword begins on a windswept hilltop overlooking Yuya Bay. The Ōyashiki Site sits on a low ridge near the tip of the Mukatsuku Peninsula, a finger of land that reaches westward into the Sea of Japan and ends at Kawajiri Cape, the westernmost-northernmost point on the main island of Honshu. In November 1901, during the late Meiji era, a passing typhoon struck the coast and caused part of a cliff face to give way. As the soil collapsed, a curious object emerged from beneath an old stone gorintō, a five-tiered Buddhist memorial pagoda that had stood at the spot for centuries.

The find was a bronze sword, broken into seven fragments and partially missing its tip and pommel ornament. The land belonged to the Yagi family, and they preserved the relic carefully through the decades that followed. In 1956, more than half a century after its rediscovery, the Japanese government designated the sword an Important Cultural Property in recognition of its extraordinary archaeological value. The sword has now been entrusted to the city of Nagato, and in 2024 the Agency for Cultural Affairs officially designated Nagato City as its managing body, ensuring it can finally be shared with the public.

What Makes This Bronze Sword So Rare

To understand why specialists describe this sword as one of the most important Yayoi-period bronze artifacts in Japan, it helps to know what sets it apart from the hundreds of other bronze swords excavated across the archipelago. Roughly seven to eight hundred Yayoi bronze swords have been recovered nationwide, and of these only about a hundred belong to the slender-form (hosogata) category. Within that small group, just five examples possess an integrated bronze hilt cast as a single piece with the blade and pommel ornament. The Nagato sword is the only one of these five that has been found in the main island of Honshu; the others come from northern Kyushu, including the celebrated Yoshinogari Site in Saga Prefecture.

The sword's defining feature is what Japanese archaeologists call the "antenna-shaped" pommel decoration. Two curved projections rise from the top of the hilt, resembling the antennae of a butterfly or moth. This distinctive form has its ultimate origins in the bronze cultures of northern Eurasia and reached the Japanese islands through the Korean peninsula. The continuous casting of blade, hilt, and pommel ornament in a single bronze pour required exceptional metallurgical skill and was almost certainly the work of mainland artisans rather than local Yayoi craftsmen.

Why It Was Designated an Important Cultural Property

The 1956 designation reflected several layers of significance that scholars have continued to explore in the seven decades since. First and foremost, the sword preserves direct evidence of how the most sophisticated bronze weapons were manufactured during the middle Yayoi period, between roughly the second and first centuries BCE. The integrated casting technique reveals technological knowledge that did not develop independently in Japan and points clearly to maritime contact with Korea and continental East Asia.

Equally important is what the sword tells us about Yayoi society. By the time it was buried, slender bronze swords had largely ceased to function as battlefield weapons and had become symbols of authority and ritual prestige. The fact that the Mukatsuku Peninsula produced an artifact comparable in quality to those buried with chieftains at Yoshinogari suggests that an influential community lived here on the very edge of Honshu, drawing power and goods from sea routes that connected northern Kyushu, the Korean peninsula, and the Sea of Japan coast. Subsequent excavations at nearby sites such as Hongō-Yamasaki, where Yayoi-period irrigation channels and stone harvesting knives have been found, support this picture of an organized agricultural society capable of supporting an emerging elite.

Highlights for Visitors

Standing before the sword in person is a quietly powerful experience. Although the blade is broken, the seven recovered fragments together preserve a length of just over forty-four centimeters, and conservators have completed careful restoration work in preparation for public display. The greenish patina that covers the bronze gives the surface a subtle, mottled beauty, and visitors who look closely can make out the elegant taper of the slender blade and the delicate curl of the antenna-shaped pommel. The proportions are unexpectedly graceful for an object made for ritual or status, and it is easy to imagine why such a sword would have been treasured by its original owner.

The current special exhibition at Historia Nagato (the Nagato Comprehensive Cultural Property Center) places the sword in dialogue with related objects, including a comparable bronze sword and pottery from the Yoshinogari Site in Saga. Through this comparison, visitors can grasp the remarkable fact that two communities at opposite ends of a maritime corridor, separated by hundreds of kilometers of coastline, possessed nearly identical prestige goods. The exhibition also explores the puzzle of why these particular two locations, and no others on Honshu, yielded objects of this kind.

Exploring the Surrounding Area

A visit to see the sword pairs naturally with exploration of the Mukatsuku Peninsula and the wider Nagato region, which together offer some of the most distinctive coastal scenery in western Japan. Just a short drive from Historia Nagato lies Motonosumi Shrine, famous for its tunnel of more than one hundred vermilion torii gates that descends a grassy headland toward the sea. The shrine has been ranked among the most beautiful places in Japan by international media and stands close to Ryūgū no Shiofuki, a natural blowhole where waves explode through coastal rocks.

Not far from the original discovery site is Nison-in Temple, a Buddhist temple whose grounds preserve a famous stone gorintō traditionally associated with the legend of Yang Guifei, the Tang Chinese beauty said to have escaped death and washed ashore on this coast. The temple also houses important wooden statues of Shaka and Amida Buddha that are themselves designated cultural properties. Other nearby attractions include the panoramic Senjōjiki grassland on the peninsula's high ridge, the photogenic rice terraces of Higashi-Ushirobata that overlook the sea, and the geological wonders of Ōmijima Island. Inland, the historic hot spring town of Nagato Yumoto Onsen provides a tranquil place to rest after a day of cultural exploration.