Ogata Takayuki

写真a

Title

Associate Professor

Researcher Number(JSPS Kakenhi)

50548287
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Education   Associate Professor  

  • Concurrently   University of the Ryukyus   Disaster Prevention Research Center for Island Regions  

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University 【 display / non-display 】

  • 　
    -
    2005

    University of Tsukuba     Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    2005.03

    University of Tsukuba    Doctor's Course  Completed

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External Career 【 display / non-display 】

  • 2012
    　
    　

    - , University of the Ryukyus, Faculty of Education, Associate Professor  

  • 2012.07
    　
    　

    University of the Ryukyus  

  • 2016
    　
    　

    - , University of the Ryukyus, Disaster Prevention Research Center for Island Regions, Associate Professor  

  • 2016.07
    　
    　

    University of the Ryukyus  

  • 2021
    　
    　

    - , University of the Ryukyus, Graduate School of Engineering and Science, Associate Professor  

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Affiliated academic organizations 【 display / non-display 】

  • 　
    　
    　
     

    TOKYO GEOGRAPHICAL SOCIETY 

  • 　
    　
    　
     

    JAPAN ASSOCIATION FOR QUATERNARY RESEARCH 

  • 　
    　
    　
     

    THE ASSOCIATION OF JAPANESE GEOGRAPHERS 

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    JAPAN GEOSCIENCE UNION 

  • 1900.04
    -
    Now
     

    Japan Association for Quaternary Research 

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Research Interests 【 display / non-display 】

  • Geography

  • Geoscience

  • Geomorphology

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Research Areas 【 display / non-display 】

  • Natural Science / Human geosciences

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Research Theme 【 display / non-display 】

  • Geoecological system and education on karst landforms

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Published Papers 【 display / non-display 】

  • Geosites of Yonaguni Island Located at the Westernmost Point of Japan

    Takayuki Ogata

    E-journal GEO   15 ( 1 ) 44 - 54   2020.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Geosites of Yonaguni Island Located at the Westernmost Point of Japan

    Takayuki OGATA, Makoto OTSUBO, Hideyuki ITOH

    E-journal GEO ( The Association of Japanese Geographers )  15 ( 1 ) 44 - 54   2020

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>Yonaguni Island is located in the westernmost Ryukyu arc, where the geological setting extends to the Taiwan central range and the Luzon volcanic arc, along the subduction zone between the Eurasian and Philippine Sea plates. This paper reports the results of landform analyses based on the 10 m Digital Elevation Model and field observation at outcrops of three geosites. Miocene sandstone (Yaeyama Group) is broadly exposed on the island surface which forms low-altitude mountains and hills (maximum elevation 231 m).Pleistocene limestone (Ryukyu Group) partly covers the Yaeyama Group and forms uplifted marine terraces composed mainly of coral reef sediments. This paper focuses on three geosites: Tindabana; Kubura-furishi; and Sanninu-dai. Tindabana is a cliff including unconformity of the Yaeyama Group sandstone and Ryukyu Group limestone, producing groundwater discharge, springs, and notches. Kubura-furishi is a rocky coast consisting of a shore platform and cliffs made of the Yaeyama Group sandstone forming remarkable tafoni. Sanninu-dai shows normal faults and many joints derived from horizontal stresses. These geosites indicate geomorphic processes in isolated island environments and suggest landform development in relation to back-arc tectonics. Yonaguni Island presents an interesting field for geotourism and border tourism in collaboration with Taiwan.</p>

  • Geoscientific studies on the Quaternary faulting and geomorphic processes of the Ryukyu arc, southwestern Japan

    Ogata Takayuki, Otsubo Makoto

    The Quaternary Research (Daiyonki-Kenkyu) ( Japan Association for Quaternary Research )  58 ( 6 ) 377 - 395   2019.12

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>This paper reviews studies on the Quaternary tectonics and geomorphic processes of the Ryukyu arc, southwestern Japan. The Ryukyu arc lies along the subduction zone between the Eurasia and Philippine sea plates. Many islands of the Ryukyu arc are classified into volcanic islands, accretionary complex islands and uplifted coral reef islands. The Quaternary tectonics forms many strike-slip and normal faults in the Pleistocene limestone (Ryukyu group) originating from coral reef sediments. Mountains and hills consisting of metamorphic and sedimentary rocks are eroded, reflecting the rate of weathering controlled by various environmental conditions. Previous physiographic studies considered several landforms as tropical and subtropical landscapes, whereas such landforms should be reconsidered in terms of geological factors as well as climatic ones. The authors suggest that future studies require a more comprehensive and integrated understanding of the geomorphic processes involving both the climatic and geological factors.</p>

  • Geoscientific studies on the Quaternary faulting and geomorphic processes of the Ryukyu arc, southwestern Japan

    Takayuki Ogata, Makoto Otsubo

    The Quaternary Research   58 ( 6 ) 377 - 395   2019.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    This paper reviews studies on the Quaternary<br /> tectonics and geomorphic processes of the Ryukyu arc, southwestern Japan. The Ryukyu arc lies along the subduction zone between the Eurasia and Philippine sea plates. Many islands of the Ryukyu arc are classified into volcanic islands, accretionary complex islands and uplifted coral reef islands. The Quaternary tectonics forms many strike-slip and normal faults in the Pleistocene limestone (Ryukyu group) originating from coral reef sediments. Mountains and hills consisting of metamorphic and sedimentary rocks are eroded, reflecting the rate of weathering controlled by various environmental conditions. Previous physiographic studies considered several<br /> landforms as tropical and subtropical landscapes, whereas such landforms should be reconsidered in terms of geological factors as well as climatic ones. The authors suggest that future studies require a more comprehensive and integrated understanding of the geomorphic processes involving both the climatic and geological factors.

  • Geosciences in Japanese Geoparks

    OGATA Takayuki

    Journal of Geography (Chigaku Zasshi) ( Tokyo Geographical Society )  124 ( 1 ) 31 - 41   2015

    Type of publication: Research paper (scientific journal)

    　View Summary

     Geoparks target all geoscientific multidisciplinary and interdisciplinary areas, whereas scientific topics of Japanese geoparks incline toward specific themes. Content analysis reveals that many geoparks attach greater importance to solid earth sciences (e.g. geology) and/or human geosciences (e.g. geography) than biogeosciences (e.g. paleontology), atmospheric and hydrospheric sciences (e.g. meteorology), and space and planetary sciences. Specialization coefficients clearly show this inclination, and suggest a shift from geological to geographical themes. Multivariate analyses also indicate several clusters of Japanese geoparks characterized mainly by geological and/or geographical contents. This specialization enumerates geological and/or geographical topics, and restricts a seamless geostory for interpreting a landscape. An educational program on the Ryukyu Islands focuses on various geomorphic processes related to the global environmental system. This program contributes to both an attractive and scientific geostory on interactions among atmosphere, hydrosphere, and geosphere. A seamless geostory using multidisciplinary and interdisciplinary approaches should be given more consideration in all Japanese geoparks, because it enhances a comprehensive outreach and education on geoscience.

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Books 【 display / non-display 】

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Other Papers 【 display / non-display 】

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Presentations 【 display / non-display 】

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Media Coverage 【 display / non-display 】

  • 連載「ジオサイト紀行：島々の多様性」  Newspaper, magazine

    沖縄タイムス  2022

    Author： Myself 

  • ブラタモリ（日本の岩石スペシャル）  TV or radio program

    NHK  ブラタモリ  2021.4

  • 新連載：TVに登場した地理学者にきく（第1回）  Newspaper, magazine

    古今書院  地理  66 (4)  2021.4

  • 特集「ジオ琉球の旅」  Newspaper, magazine

    日本トランスオーシャン航空  Coralway (No.193)  2021.3

  • 琉球石灰岩で学ぶ沖縄の地層と文化  Newspaper, magazine

    日本石材工業新聞社  日本石材工業新聞  2021.2

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