Yoshitake Takagi Ruins

Yoshitake-Takagi Site: Where Japan's Earliest "Royal Tomb" Came to Light

On the western edge of Fukuoka City, the Sawara Plain spreads in a fan toward the Genkai Sea, hemmed in on its other three sides by the Sefuri Mountains and the hills that branch off them. The Muromi River runs down the middle of this small, self-contained basin, and along its middle reaches lie the Yoshitake archaeological sites. The Yoshitake-Takagi Site occupies the southern end of that cluster. What was found here in the 1980s reshaped how archaeologists talk about the beginnings of social rank and political power in the Japanese islands.

The site is a Yayoi-period complex of graves and buildings. In one compact burial ground, excavators uncovered a set of tombs furnished with imported bronze and quantities of jade far beyond anything in the surrounding cemeteries. One of those graves held a bronze mirror, bronze weapons, and a jade ornament together, the earliest known Japanese burial to combine all three. Because the same three categories of object later became the Imperial Regalia, the press of the day called it the "oldest royal tomb," and the name stuck.

From a Farmland Survey to a Major Discovery

The work began with a public-works plan, not a treasure hunt. In 1980 the city scheduled a land-improvement project for the Iimori-Yoshitake area, and from 1981 to 1985 the Fukuoka City Board of Education ran five rounds of advance excavation ahead of construction. The picture that emerged was much larger than anyone expected: a settlement occupied from the Jomon period through the medieval centuries, peaking in the Yayoi period. Across the wider site group, archaeologists recorded roughly 1,200 burials centred on jar coffins, some fifty pits packed with red-burnished pottery, pit dwellings, and post-built structures.

The breakthrough came in 1985, in the Takagi district. Large jar-coffin and wooden-coffin burials began yielding bronze weapons and personal ornaments, and the discovery in the No. 3 wooden-coffin burial of a mirror, weapons, and beads together drew crowds of visitors after newspapers and television carried the story. The Takagi and neighbouring Oishi districts proved important enough that, with strong cooperation from local residents, part of the ground was preserved intact rather than dug away and built over.

Why the Site Was Designated

The Takagi burial ground does something earlier Yayoi cemeteries did not: it sets itself apart. Within a surveyed area of about 350 square metres, four wooden-coffin burials, sixteen jar-coffin burials, and eighteen small jar-coffin burials cluster together as a distinct precinct, separate from the communal graves nearby. The small jar coffins, thought to hold children, gather in the eastern half; the larger adult jar coffins and the wooden coffins occupy the western half, their long axes lined up to the northeast in a deliberate arrangement. Several adult graves were marked at the surface with slabs of granite and andesite, a visible claim on the ground that contemporaries did not make.

The jar coffins are Kinkai-type vessels of the very end of the Early Yayoi and the start of the Middle Yayoi. Adult examples were made unusually large, a few decorated with notched, fern-frond bands or with two deer shown at a gallop. Grave goods turned up in four wooden-coffin burials and seven jar-coffin burials. The richest by far was the No. 3 wooden-coffin burial near the southern edge of the precinct: alongside a jade comma-shaped bead and a necklace of ninety-five jasper tube beads, it contained a multi-knobbed fine-line mirror, two bronze swords, a bronze dagger-axe, and a bronze spearhead, a combination unmatched by any other grave here. The large No. 2 wooden-coffin burial, set near the centre, lay in a pit 4.8 metres long and 3.5 metres wide and held a split-bamboo-style coffin, a bronze sword, and strings of jade and jasper beads.

Counted together, the Takagi graves produced nine slender bronze swords, one slender bronze dagger-axe, one slender bronze spearhead, one multi-knobbed fine-line mirror, two bronze bracelets, 468 jasper tube beads, four jade comma-shaped beads, a glass bead, a polished stone arrowhead, and small pots. The mirror and the practical bronze weapons are thought to have arrived by sea from the Korean Peninsula. Graves like these, marked by large stones and set apart in their own precinct, anticipate the later "royal" tombs attributed to the states of Na (the Sugu-Okamoto Site in Kasuga City) and Ito (the Mikumo-Minaminoshoji Site in present-day Itoshima City). The people buried at Takagi appear to have been the first powerful chiefs to rise on the Sawara Plain. About forty metres east of the graves stood a large post-built hall, with raised-floor storehouses beyond it, read as part of a chiefly residence kept apart from the dwellings of ordinary villagers.

For its bearing on how social ranks formed and how authority grew in Yayoi northern Kyushu, and on the world of the "more than a hundred countries" of the Wa people recorded in the Chinese Book of Han, the Yoshitake-Takagi Site was designated a National Historic Site on October 4, 1993, with the protected area extended in September 2000. The grave goods are separately designated an Important Cultural Property.

What to Look For on a Visit

The largest structure found here was no ordinary house. The great hall measured roughly 12.5 metres along its long side and 9.5 metres across, with a western aisle and eave-support posts ringing its northern and eastern faces, the biggest building of its date then known. Stand at its reconstructed footprint and the scale registers: this was a stage for someone, not a place to sleep and store grain. Fifty metres to the south, seven raised-floor storehouses once stood. Tellingly, no ordinary pit dwellings share this ground. The people who built here lived, and were buried, on their own terms.

The single most discussed object is the No. 3 burial's mirror, sword, and bead. Centuries before the imperial myths were written down, the three things that those myths would name as symbols of rule already lay together in one grave on the Sawara Plain. Whether the burial's occupant understood them that way is unknowable; what the grave records is that, by the early Middle Yayoi, certain objects had become the language of authority here.

Around the Site

Since April 2017 the grounds have been open as Yayoi no Kaze Park, a 2.7-hectare history park whose name translates roughly as "Park of the Yayoi Wind." The land has been shaped to suggest the original terrain and planting, and full-size replicas of the bronze swords, the mirror, and the jar coffins are set out where visitors can look closely. Themed zones explain the special burial precinct, the "jar-coffin road," and the great hall, and broad lawns are given over to events and open play. The actual excavated grave goods, the originals behind the replicas, are held and exhibited at the Fukuoka City Museum, near Momochihama on the city's northern waterfront, where they can be seen in the wider context of the region's early history. Mt. Iimori rises to the west of the park and the Muromi River runs to the east, the same landmarks that framed the settlement two thousand years ago.