Yayoi period

The period takes its name from Yayoi-chō in Tokyo's Bunkyō ward, where a distinctive pot was found in 1884. It is defined by the establishment of wet-rice agriculture rather than by pottery alone. The conventional start of around 300 BCE has been challenged by accelerator radiocarbon dating carried out by the National Museum of Japanese History, which places the earliest paddy fields in northern Kyushu – at sites such as Nabatake in Karatsu and Itazuke in Fukuoka – around the tenth century BCE. Many scholars now accept an earlier start, though the precise dates remain debated.

Rice farming spread unevenly. It reached the Kinai region around the sixth to fourth centuries BCE and the northern tip of Honshu within a few centuries more, but it never took hold in Hokkaido, where foraging continued, or in the Ryukyu Islands, which followed a separate path. The end of the period is usually set in the middle of the third century CE, when the first great keyhole-shaped burial mounds appear.

Wet-rice cultivation required irrigation channels, levelled paddies and communal labour. Farmers used wooden hoes and spades, harvested ears of rice with semicircular stone reaping knives (ishibōchō) and stored the grain in raised-floor granaries protected from damp and rodents. Millet, barley and beans were also grown, and hunting and fishing continued alongside farming.

Bronze and iron arrived almost together. Iron, at first imported as ingots and tools from the Korean peninsula, gradually replaced stone for axes, sickles and weapons, and control of iron supplies became a source of power. Bronze was used mainly for prestige and ritual objects. Weaving of hemp and later silk, and the building of wells, added to a new material culture that looks recognisably ancestral to rural Japan.

With farming came clear signs of hierarchy: rich burials with bronze mirrors and weapons for a few, simple graves for most. Villages were ringed with ditches and palisades (kangō shūraku), hilltop settlements were built for defence, and skeletons with embedded arrowheads and severed heads show that violence was common. Jar burials (kamekan) in northern Kyushu and square moated burial mounds elsewhere reveal distinct regional elites.

Chinese sources describe this world from the outside. The Han shu speaks of the people of Wa divided into more than a hundred 'countries'; the Hou Han shu records that in 57 CE the king of Na sent an envoy to the Han court and received a seal, and a gold seal inscribed with the name of Na was found on Shikanoshima island in Fukuoka in 1784. The same chronicle reports a period of great disorder in Wa in the late second century.

The Wei zhi, a Chinese chronicle of the late third century, contains the section known in Japan as the Gishi Wajinden, the account of the people of Wa. It tells how, after years of war, the countries of Wa chose as their ruler a woman named Himiko, who 'served the way of spirits' and lived secluded, attended by a thousand women, while her brother handled affairs of state. In 239 she sent an envoy to the Wei court and received the title 'Queen of Wa, Friend of Wei', a gold seal and a hundred bronze mirrors. After her death, around 248, a great mound was raised for her, and a young female relative, Iyo (or Toyo), eventually succeeded her.

Where Yamatai lay is one of the longest-running debates in Japanese history. One school places it in northern Kyushu; the other in the Nara Basin, pointing to the large early settlement at Makimuku near Sakurai and the Hashihaka mound, which some identify as Himiko's tomb. The chronicle's directions cannot be reconciled with either location without emendation, and no conclusive evidence has been found.

Yayoi ritual centred on the farming year. Bronze bells (dōtaku), which began as sounding instruments and grew into large decorated objects for display, were used in agrarian ceremonies and later buried, often in groups on hillsides away from settlements. Bronze swords, spears and halberds were similarly transformed from weapons into ritual objects. Carved wooden birds on poles, found at several sites, may have marked village boundaries or sacred space.

The Wei zhi records that the people of Wa practised divination by cracking heated bones, a technique that survived in court ritual. Many historians see Yayoi agricultural rites – prayers for rain, harvest festivals, the worship of local deities of land and water – as one of the roots of later kami worship.

Yayoi archaeology is rich because rice paddies, wells and waterlogged sites preserve wood, seeds and tools. Several reconstructed villages give a vivid picture of the period.

The Yayoi period laid the foundations of historical Japan: rice as the staple and measure of wealth, villages organised around irrigation, metalworking, and a political landscape of competing chiefdoms that would consolidate in the following Kofun period. Genetic research confirms substantial migration from the continent mixing with the Jōmon population, and many linguists associate the spread of the Japonic languages with Yayoi farmers.

The period also produced lasting images. The raised granary and the moated village have become symbols of Japan's agrarian roots, and the question of Yamatai continues to draw scholars and amateur historians alike.