| Project/Area Number |
14390027
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
広領域
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| Research Institution | Aichi University of Education |
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Principal Investigator |
KAWAMURA Yoshinari Aichi University of Education, Faculty of Education, Professor, 教育学部, 教授 (00135394)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIKAWA Shusaku Osaka City University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (30047394)
INADA Takashi Osaka University, Faculty of Letters, Professor, 文学部, 教授 (40135926)
MATSU'URA Shuji Ochanomizu University, Faculty of Human Life and Environmental Science, Professor, 生活科学部, 教授 (90141986)
KONDO Megumi Ochanomizu University, Faculty of Human Life and Environmental Science, Research Associate, 生活科学部, 助手 (40302997)
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| Project Period (FY) |
2002 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥10,600,000 (Direct Cost: ¥10,600,000)
Fiscal Year 2005: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2004: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2003: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2002: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | Quarternary / Japanese Islands and their adjacent areas / Human immigration / Ice bridge / Land bridge / Multidisciplinary study / Archaeology and anthropology / Geology and paleontology |
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| Research Abstract |
On the basis of the geological and paleontological studies, it is inferred that land bridges were formed in and around the Japanese Islands, three times during the Quaternary, namely at 1.2 Ma, 0.6Ma and 0.4Ma, and ice bridges were formed only in the Tsugaru Strait at 20ka. The frequency and duration of the land bridge formation were fewer and much shorter than those previously considered. The immigrations of mammals into the Japanese Islands were limited during the Quaternary, especially since the Middle Pleistocene, and thus the mammalian faunas of the islands were considerably different from those of the continent during the period. As regards archaeology, Paleolithic tools prior to the Late Pleistocene have been unknown in the Japanese Islands, while those of the Early to Late Pleistocene have abundantly occurred in the continent. Moreover, the recent anthropological revision has revealed that only a few human fossils are reliable as Pleistocene humans among many "human" fossils recorded from the mainland of Japan, and they were dated as the last part of the Late Pleistocene. We assume that humans were not able to immigrate through the land bridges into the Japanese Islands during the Pleistocene, because the land bridge formation was quite limited in frequency and duration. It is possible that the humans immigrated by ferrying and rafting techniques across narrow straits formed by the drops of sea level during cold stages of the Late Pleistocene.
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