Masaaki Kimura (木村 政昭, Kimura Masaaki, born 6 November 1940) is a Japanese geologist and a professor emeritus from the Faculty of Science of the University of the Ryukyus, Okinawa, Japan.^[1][2]

Biography

Masaaki Kimura graduated in science at the Faculty of Fisheries of the University of Tokyo (1963) and obtained a Doctorate in marine geology (1968). He has worked for the University of Tokyo's Ocean Research Institute, the Geological Survey of Japan, the Agency of Industrial Science and Technology of the Ministry of International Trade and Industry of Japan, and Columbia University's Lamont–Doherty Earth Observatory. He taught at the University of the Ryukyus from 1977 to 2002.^[1] He has since retired from that University and is now general director of Marine Science and Culture Heritage Research Association.

Research

His specialties are marine geology, geophysics, seismology, volcanology, and marine archaeology. He has extensively researched the formation of the Okinawa Trough, and claimed to have predicted the volcanic eruptions in Miyake Island (1983), Izu Ōshima (1986), and Mount Unzen (1991).

Apart from his geological research, Kimura is best known to the world for his exploration of underwater structures which he claims are ruins of an ancient civilization. These structures were identified by local divers in 1988. In 1992 he studied the so-called Yonaguni Monument and other formations off the coast of Yonaguni, the westernmost of the Ryukyus. In a report given to the 21st Pacific Science Congress in 2007 he suggested that it had been built 2,000 to 3,000 years ago as the sea level then was close to current levels.^[3]

Publications

1. Kimura, Masaaki (1976). "Major Magmatic Activity as a Key to Predicing Large Earthquakes Along the Sagami Trough, Japan". Nature. 260 (5547): 131–133. Bibcode:1976Natur.260..131K. doi:10.1038/260131b0. S2CID 4279192.
2. "Geological Structure of the Izu Ogasawara Arc and Trench". 1976. {{cite journal}}: Cite journal requires |journal= (help)
3. "Significant Eruptive Activities Related to Large Interplate Earthquakes in the Northwestern Pacific Margin". 1978. {{cite journal}}: Cite journal requires |journal= (help)
4. "Volcanism and Seismicity in the Kyushu and Ryukyu Islands Areas". 1978. {{cite journal}}: Cite journal requires |journal= (help)
5. "Submarine Geology around the Southern Ryukyu Islands, with Special Reference to the Okinawa Trough". 1979. {{cite journal}}: Cite journal requires |journal= (help)
6. "Submarine Tectonics Around the Japanese Islands, with Special Reference to Tectonics of the Sagami Trough". 1979. {{cite journal}}: Cite journal requires |journal= (help)
7. "Backarc Volcanism and rifting in the Okinawa trough". Marine and Petroleum Geology. 2: 222–240. 1981. doi:10.1016/0264-8172(85)90012-1.
8. "Formation of the Okinawa Trough". 1985. {{cite journal}}: Cite journal requires |journal= (help)
9. "Okinawa Trough genesis: structure and evolution of a backarc basin developed in a continent". 1985. {{cite journal}}: Cite journal requires |journal= (help)
10. "Back Arc Rifting in the Okinawa Trough". 1986. {{cite journal}}: Cite journal requires |journal= (help)
11. "Okinawa Trough Genesis: Structure and Evolution of a Backarc Basin Developed in a Continent". 1986. {{cite journal}}: Cite journal requires |journal= (help)
12. "Origin of the Okinawa Trough". 1986. {{cite journal}}: Cite journal requires |journal= (help)
13. "The Okinawa Trough : Genesis of a Back arc Basin Developing Continental Margin". 1986. {{cite journal}}: Cite journal requires |journal= (help)
14. Sibuet, Jean-Claude; Masaaki Kimura; et al. (1987). "Back arc extension in the Okinawa Trough" (PDF). Journal of Geophysical Research. 92 (B13): 14041–14063. Bibcode:1987JGR....9214041S. doi:10.1029/JB092iB13p14041. S2CID 55267835.
15. "Geostructure of the Okinawa Trough". 1988. {{cite journal}}: Cite journal requires |journal= (help)
16. "Submarine Geology of the Nansei Islands". Modern Geology. 1988.
17. "Major and trace element chemistry and D/H, 18O/16O, 87Sr/86Sr and 143Nd/144Nd ratios of rocks from the spreading center of the Okinawa Trough, a marginal back arc basin". 1991. {{cite journal}}: Cite journal requires |journal= (help)
18. "Morphology and Geology of the Magellan Trough Area in the Central Pacific". 1992. {{cite journal}}: Cite journal requires |journal= (help)
19. "Origin of the Magnetic Anomalies in the Southern Okinawa Trough". 1992. {{cite journal}}: Cite journal requires |journal= (help)
20. "Relationship between the West Pacific Rift System and mid oceanic ridges". 1992. {{cite journal}}: Cite journal requires |journal= (help)
21. "Tectonic Evolution of the East China Sea and the Okinawa Trough". 1992. {{cite journal}}: Cite journal requires |journal= (help)
22. Science on Eruptions and Earthquakes. Ronso-sha. 1993.
23. Volcanic Belts and Volcano-Tectonic Structure of the East Asia. Geological Committee for Mineral Resources of the Russian Federation Government Far Eastern Research Institute of Raw Materials. 1993.
24. Prediction of the shock. Seishun-shuppan. 1994.
25. "Active Rift System in the Okinawa Trough and Its Northeastern Continuation". 1995. {{cite journal}}: Cite journal requires |journal= (help)
26. "Quaternary Paleo-Geography of the Ryukyu Arc". Journal of Geography. 105 (3). 1996.
27. "Construction and breakup of the Ryukyu Landbridge and their tectonic implications as derived from precise bottom topography and regional gravity anomaly in the southwestern part of the Japanese islands". 1996. {{cite journal}}: Cite journal requires |journal= (help)
28. "Neotectonic development of the Okinawa Trough and the Ryukyu Arc". 1996. {{cite journal}}: Cite journal requires |journal= (help)
29. Kimura, Masaaki (1996). "Ryukyu in the Late Quaternary". Journal of Geography (in Japanese). 105 (3): 261–268.
30. "Seismicity and Crustal Movement of Ryukyu Arc". 1997. {{cite journal}}: Cite journal requires |journal= (help)
31. "Surface Deformation and Origin of Large Scale Tsunami in the Southwesternmost Part of the Ryukyu Arc". 1997. {{cite journal}}: Cite journal requires |journal= (help)
32. A Continent Lost in the Pacific Ocean - Riddle of the Submarine Ruins in the Ryukyu Islands - Tokyo 1998
33. "Geochemical and Sr Nd isotopic characteristics of volcanic rocks from the Okinawa Trough and Ryukyu Arc: Implications for the evolution of a young, intracontinental back arc basin". 1999. {{cite journal}}: Cite journal requires |journal= (help)
34. "Ancient Megalithic Construction Beneath the Sea off Ryukyu Islands in Japan, Submerged by Post Glacial Sea level Change". 2004. {{cite journal}}: Cite journal requires |journal= (help)
35. "Statistical analysis of time distance relationship between volcanic eruptions and great earthquakes in Japan". 2004. {{cite journal}}: Cite journal requires |journal= (help)
36. "Frequency Attribute Study of Seismic Data". 2005. {{cite journal}}: Cite journal requires |journal= (help)
37. "The Mid Niigata Prefecture Earthquake in 2004: A view from Statistical Analysis". 2005. {{cite journal}}: Cite journal requires |journal= (help)
38. Matsumoto Tsuyoshi; Shinjo Ryuichi; Nakamura Mamoru; Omori Tamotsu; Li Shoko; Kyo Konju; Sibuet Jean-Claude; Imamura Makiko; Ishii Toshie (2005). "New topographic map of the southwestern Okinawa Trough". Shinkai Shinpojiumu Yokoshu. 21: 115–116.
39. "Submarine, across arc normal fault system in the southwest Ryukyu Arc: trigger of the 1771 tsunami hazard?". 2006. {{cite journal}}: Cite journal requires |journal= (help)
40. Diving Survey Report for Submarine Ruins Off Yonaguni, Japan
41. Masaaki Kimura. "Sunken Citadel off Yonaguni Island". Ancient American. 6 (39).

References