is a Japanese geologist and a

professor emeritus ''Emeritus'' (; female: ''emerita'') is an adjective used to designate a retired chair, professor, pastor, bishop, pope, director, president, prime minister, rabbi, emperor, or other person who has been "permitted to retain as an honorary title ...

from the Faculty of Science of the

University of the Ryukyus The , abbreviated to , is a Japanese national university in Nishihara, Okinawa Prefecture, Japan. Established in 1950, it is the westernmost national university of Japan and the largest public university in Okinawa Prefecture. Located in the S ...

Okinawa is a prefecture of Japan. Okinawa Prefecture is the southernmost and westernmost prefecture of Japan, has a population of 1,457,162 (as of 2 February 2020) and a geographic area of 2,281 km2 (880 sq mi). Naha is the capital and largest city ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

Biography

Masaaki Kimura graduated in science at the Faculty of Fisheries of the

University of Tokyo , abbreviated as or UTokyo, is a public research university located in Bunkyō, Tokyo, Japan. Established in 1877, the university was the first Imperial University and is currently a Top Type university of the Top Global University Project by ...

(1963) and obtained a

Doctorate A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism ''l ...

marine geology Marine geology or geological oceanography is the study of the history and structure of the ocean floor. It involves geophysical, geochemical, sedimentological and paleontological investigations of the ocean floor and coastal zone. Marine geolog ...

(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 Agency may refer to: Organizations * Institution, governmental or others ** Advertising agency or marketing agency, a service business dedicated to creating, planning and handling advertising for its clients ** Employment agency, a business that ...

of the

Ministry of International Trade and Industry The was a ministry of the Government of Japan from 1949 to 2001. The MITI was one of the most powerful government agencies in Japan and, at the height of its influence, effectively ran much of Japanese industrial policy, funding research and di ...

of Japan, and

Columbia University Columbia University (also known as Columbia, and officially as Columbia University in the City of New York) is a private research university in New York City. Established in 1754 as King's College on the grounds of Trinity Church in Manhatt ...

Lamont–Doherty Earth Observatory The Lamont–Doherty Earth Observatory (LDEO) is the scientific research center of the Columbia Climate School, and a unit of The Earth Institute at Columbia University. It focuses on climate and earth sciences and is located on a 189-acre (64 h ...

. He taught at the University of the Ryukyus from 1977 to 2002. He has since retired from that University and is now general director o
Marine Science and Culture Heritage Research Association

Research

His specialties are

geophysics Geophysics () is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis. The term ''geophysics'' som ...

seismology Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other ...

volcanology Volcanology (also spelled vulcanology) is the study of volcanoes, lava, magma and related geological, geophysical and geochemical phenomena (volcanism). The term ''volcanology'' is derived from the Latin word ''vulcan''. Vulcan was the anci ...

, and

marine archaeology Maritime archaeology (also known as marine archaeology) is a discipline within archaeology as a whole that specifically studies human interaction with the sea, lakes and rivers through the study of associated physical remains, be they vessels, s ...

. He has extensively researched the formation of the

Okinawa Trough The (also called , literally China-Ryukyu Border Trough ) is a seabed feature of the East China Sea. It is an active, initial back-arc rifting basin which has formed behind the Ryukyu arc-trench system in the West Pacific. It developed where th ...

, and claimed to have predicted the volcanic

eruption Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often ...

s in Miyake Island (1983),

Izu Ōshima is an inhabited volcanic island in the Izu archipelago in the Philippine Sea, off the coast of Honshu, Japan, east of the Izu Peninsula and southwest of Bōsō Peninsula. As with the other islands in the Izu Island group, Izu Ōshima form ...

(1986), and

Mount Unzen is an active volcanic group of several overlapping stratovolcanoes, near the city of Shimabara, Nagasaki on the island of Kyushu, Japan's southernmost main island. In 1792, the collapse of one of its several lava domes triggered a megatsunam ...

(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 The , also known as , is a submerged rock formation off the coast of Yonaguni, the southernmost of the Ryukyu Islands, in Japan. It lies approximately a hundred kilometres east of Taiwan. Marine geologist Masaaki Kimura claims that the formati ...

and other formations off the coast of

Yonaguni , one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying from the east coast of Taiwan, between the East China Sea and the Pacific Ocean proper. The island is administered as the Towns of Japan, town of Yonaguni, Okina ...

, 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.

Publications

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # A Continent Lost in the Pacific Ocean - Riddle of the Submarine Ruins in the Ryukyu Islands - Tokyo 1998 # # # # # # # # Diving Survey Report for Submarine Ruins Off Yonaguni, Japan #

References

Living people University of Tokyo alumni Year of birth missing (living people) {{Japan-academic-bio-stub