Yayoi (弥生時代) is an era in Japan from 300 BC to A.D. 250. It is named after the section of Tokyo where archaeological investigations uncovered its trace.
The next cultural period, the Yayoi flourished between about 300 BC. and A.D. 250 from southern Kyushu to northern Honshu. The earliest of these people, who are thought to have migrated from Korea to northern Kyushu and intermixed with the Jomon, also used chipped stone tools. Although the pottery of the Yayoi was more technologically advanced--produced on a potter's wheel--it was more simply decorated than Jomon ware. The Yayoi made bronze ceremonial nonfunctional bells, mirrors, and weapons and, by the 1st century A.D., iron agricultural tools and weapons. As the population increased and society became more complex, they wove cloth, lived in permanent farming villages, constructed buildings of wood and stone, accumulated wealth through landownership and the storage of grain, and developed distinct social classes. Their irrigated, wet-rice culture was similar to that of central and south China, requiring heavy inputs of human labor, which led to the development and eventual growth of a highly sedentary, agrarian society. Unlike China, which had to undertake massive public works and water-control projects, leading to a highly centralized government, Japan had abundant water. In Japan, then, local political and social developments were relatively more important than the activities of the central authority and a stratified society.
The earliest written records about Japan are from Chinese sources from this period. Wa (the Japanese pronunciation of an early Chinese name for Japan) was first mentioned in A.D. 57. Early Chinese historians described Wa as a land of hundreds of scattered tribal communities, not the unified land with a 700-year tradition as laid out in the Nihongi, which puts the foundation of Japan at 660 BC. 3rd century Chinese sources reported that the Wa people lived on raw vegetables, rice, and fish served on bamboo and wooden trays, had vassal-master relations, collected taxes, had provincial granaries and markets, clapped their hands in worship (something still done in Shinto shrines), had violent succession struggles, built earthen grave mounds, and observed mourning. Himiko, a female ruler of an early political federation known as Yamatai, flourished during the 3rd century. While Himiko reigned as spiritual leader, her younger brother carried out affairs of state, which included diplomatic relations with the court of the Chinese Kingdom of Wei (A.D. 220-265).