Rice-paddy cultivation quickly spread across the Japanese Archipelago. One of the reasons for taking such a long time was that photosensitive rice does not grow in the Chubu highland where hours of sunlight are short. It took 200 years to spread to the highlands in the Chubu region. Rice-paddy cultivation had spread to the Tohoku region during the early Yayoi period and a small remains of a rice-paddy field was discovered in the Sunazawa site located in Hirosaki City, Aomori Prefecture, and it had spread to Matsumoto-daira Basin in Chuokochi (Central Highlands) and the Shinano-gawa River area during the middle of the Yayoi period. In 1981, remains of large-scale-well-ordered paddy field sections from the middle of the Yayoi period were found in the Tareyanagi site located in Inakadate Village, Minamitsugaru-gun, Aomori Prefecture. and took 300 to 400 years to spread to the Southern Kinki region and 700 to 800 years to spread to the Southern Kanto region. Rice-paddy cultivation that was introduced around the end of 10th century B. , the only a rice plants grown in a dry field were confirmed from that time, and genetic analysis of temperate Japonica rice (a rice-paddy plant)/tropical Japonica rice (a rice plant grown in a dry field) in Far East Asia shows no evidence of concerned genes from Korean Peninsula nor from North East China (Contrary to traditional theory, there is a possibility that rice-paddy plants had been introduced into Korean Peninsula from Japan.
by recent radiocarbon dating.įurthermore, although the Korean route was traditionally regarded as a likely introduction route for rice, the theory stating that rice-paddy plants were introduced through the direct introduction route from the continent (Tsushima Warm Current route/Southern introduction route from South East Asia) is now regarded as very likely from the several facts that remains of rice-paddy fields were not discovered in the Liaodong Peninsula and northern Korea until sites of modern times, the oldest carbonated rice found in the Korean Peninsula only goes back to 2000 B. Moreover, there is a possibility of the start of the Yayoi period going back to at least the 10th century B. In recent years, some evidence shows that the temperate Japonica-rice, a rice-paddy plant, was introduced by the end of Jomon period. It was the beginning of the Yayoi period. , life style of rice-paddy cultivation was introduced from the continent to northern Kyushu, and it spread to Kyushu, Shikoku, and Honshu (the main island of Japan).Įarly paddy field remains including continental ground stoneware and carbonized rice were concentrated and discovered in the northern Kyushu region, such as the Itazuke site located at Hakata Ward, Fukuoka City, Nabatake site located at Karatsu City, Saga Prefecture, Magarita site located at Fukuoka Prefecture and Notame site located at Fukuoka Prefecture. )(Also it is said that temperate Japonica rice, a paddy-rice plant, had already been introduced at the end of the Jomon period and the starting time of rice cultivation, defined as the beginning of the Yayoi period, cannot be confirmed at the moment. (In 2005, large amounts of plant opals were found from a stratum of the early Jomon period, in Nadasaki-cho, Okayama Prefecture, and many theories stating that rice cultivation with a rice plant grown in a dry field was practiced at least from 3,500 years ago, were proposed. The Yayoi period started when a group of people with rice-paddy cultivation techniques immigrated from outside the Japanese Archipelago to northern Kyushu. In specific terms, it is the period when rice-paddy cultivation started in Japan by introduction rice cropping techniques. (though there are some objections to this date) to the middle of the 3rd century. It is the period approximately between the middle of the 10th century B.
The Yayoi period follows the Jomon period and precedes the Kofun period (tumulus period). Yayoi period is one of periodizations in the Japanese Archipelago excluding Hokkaido and Okinawa Islands.
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