Analysis of information sources in references of the Wikipedia article "야요이 시대" in Korean language version.
One theory holds that immigrants fleeing the turmoil of China's Warring States period, beginning about 450 B.C., took the technology overland to present-day Korea, then across the relatively narrow Korea Strait to Japan's Kyushu Island. An alternative theory is that seafaring traders carried the technique to lands bordering the Yellow and East China seas around 1000 B.C. or earlier.
One theory holds that immigrants fleeing the turmoil of China's Warring States period, beginning about 450 B.C., took the technology overland to present-day Korea, then across the relatively narrow Korea Strait to Japan's Kyushu Island. An alternative theory is that seafaring traders carried the technique to lands bordering the Yellow and East China seas around 1000 B.C. or earlier.
BC 3세기경에 금속기의 병용(倂用)과 수도경작(水稻耕作)을 특징으로 하는 야요이(弥生) 문화가 서(西)일본에서 일어나 곡물 축적과 관개용수 통제 등이 원인이 되어 계급이 분화하고, 각지에 사제자(司祭者)를 왕으로 한 소국가(小國家)들이 성립되었다.
