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２．The Beginning of Rice Cultivation (Yayoi Period)
About 2000 and some hundred years before now, rice cultivation technology was introduced through the northern region of Kyushu. In Okayama City’s Tsushima Site, located in the low plot of land at the riverbanks on the southern foot of Mt. Handa (Okayama Tsushima Historical Remains), rice paddies subdivided by earth ridges were made. Spades, hoes and other wooden farming tools shaped from polished stone were used to carry out such tasks.
At the end of the Yayoi Period, the sediment piles flattened out, giving shape to a scenery of rice paddies that stretched over several kilometers at Hyakken River Site in Okayama City.
However, the rice paddies were buried in a thick layer of sediment through a large scale flood that occurred in 300 A.D.
