Updated on 2024/03/25

写真a

 
KAJITA HIROTO
 
Affiliation
Graduate School of Science and Technology Research Division

Degree

  • 博士(理学)

Research Interests

  • Limnology

  • Geochemistry

  • Paleoclimatology&Paleoceanography

Professional Memberships

  • 日本地質学会

  • Paleo-sciences Society

  • Geochemical Society of Japan

  • Japan Geoscience Union

Papers

  • Historical trend of polycyclic aromatic hydrocarbons in a sediment core from Osaka Bay during the Meghalayan

    Kai Nils Nitzsche, Naoto F Ishikawa, Toshihiro Yoshimura, Hiroto Kajita, Hodaka Kawahata, Nanako O Ogawa, Hisami Suga, Naohiko Ohkouchi

    The Holocene   2024.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Development of under-ice topography survey method using a small-scaled Remotely Operated Vehicle (ROV)

    Ishiwa Takeshige, Yamagata Hirokazu, Suganuma Yusuke, Shibata Daisuke, Kajita Hiroto, Maki Toshihiro

    The Journal of the Geological Society of Japan   129 ( 1 )   567 - 571   2023.11

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    CiNii Research

  • Climatic change around the 4.2 ka event in coastal areas of the East China Sea and its potential influence on prehistoric Japanese people

    Hiroto Kajita, Yuta Isaji, Rintaro Kato, Yoko Nishikura, Masafumi Murayama, Naohiko Ohkouchi, Shouye Yang, Hongbo Zheng, Ke Wang, Toshimichi Nakanishi, Takenori Sasak, Ayumi Maeda, Atsushi Suzuki, Toshiro Yamanaka, Hodaka Kawahata

    Palaeogeography, Palaeoclimatology, Palaeoecology   609 ( 111310 )   111310 - 111310   2023.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • Metal contamination in a sediment core from Osaka Bay during the last 400 years

    Kai Nils Nitzsche, Toshihiro Yoshimura, Naoto F. Ishikawa, Hiroto Kajita, Hodaka Kawahata, Nanako O. Ogawa, Katsuhiko Suzuki, Yusuke Yokoyama, Naohiko Ohkouchi

    Progress in Earth and Planetary Science   9 ( 1 )   2022.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • Long-chain alkenones in the Shimosa Group reveal palaeotemperatures of the Pleistocene interglacial Palaeo-Tokyo Bays

    Hiroto Kajita, Tsutomu Nakazawa, Masayuki Utsunomiya, Naohiko Ohkouchi, Miyako Sato, Naomi Harada, Hodaka Kawahata

    Progress in Earth and Planetary Science   9 ( 1 )   2022.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • Fatty acid composition in the terrestrial and aquatic systems of the Soya Coast and the Schirmacher Oasis, East Antarctica.

    Kajita Hiroto, Suganuma Yusuke, Kudoh Sakae, Sugiyama Shin, Ohkouchi Naohiko

    Annual Meeting of the Geological Society of Japan   2022 ( 0 )   320   2022

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    CiNii Research

  • アルケノン古水温計の新展開―沿岸・湖沼堆積物と堆積岩への適用―

    梶田展人

    地球化学   55 ( 2 )   59 - 60   2021.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Kind of work:Single Work  

  • Biomarkers in the rock outcrop of the Kazusa Group reveal palaeoenvironments of the Kuroshio region

    Hiroto Kajita, Ayumi Maeda, Masayuki Utsunomiya, Toshihiro Yoshimura, Naohiko Ohkouchi, Atsushi Suzuki, Hodaka Kawahata

    Communications Earth & Environment   2 ( 1 )   2021.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • The influence and impact of tsunamis on the microorganism assembly of Nagatsura-Ura Lagoon, Miyagi, northeastern Japan

    Yutaka Okumura, Hiromi Matsuoka, Hisayuki Arakawa, Fuyuki Tokanai, Atsushi Suzuki, Toshiaki Irizuki, Hiroto Kajita, Motoyuki Hara

    Fisheries Science   87 ( 1 )   121 - 130   2021.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • Seasonal and Spatial Variations of Chemical Weathering in the Mekong Basin: From the Headwaters to the Lower Reaches

    Hiroto Kajita, Yuki Ota, Toshihiro Yoshimura, Daisuke Araoka, Takuya Manaka, Ouyang Ziyu, Shinya Iwasaki, Takuya Yanase, Akihiko Inamura, Etsuo Uchida, Hongbo Zheng, Qing Yang, Ke Wang, Atsushi Suzuki, Hodaka Kawahata

    Aquatic Geochemistry   26 ( 2 )   137 - 159   2020.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • Diversity of long-chain alkenone producers ̶Developments of temperature proxy in inland waters̶

    Hiroto Kajita, Hideto Nakamura

    Geochemistry   54 ( 2 )   79 - 96   2020.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Genomic and geochemical identification of the long-chain alkenone producer in the estuarine Lake Takahoko, Japan: Implications for temperature reconstructions

    Hiroto Kajita, Hideto Nakamura, Naohiko Ohkouchi, Naomi Harada, Miyako Sato, Shun Tokioka, Hodaka Kawahata

    Organic Geochemistry   142   103980   2020.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

  • High time-resolution alkenone paleotemperature variations in Tokyo Bay during the Meghalayan: Implications for cold climates and social unrest in Japan

    Hiroto Kajita, Naomi Harada, Yusuke Yokoyama, Miyako Sato, Nanako Ogawa, Yosuke Miyairi, Chikako Sawada, Atsushi Suzuki, Hodaka Kawahata

    Quaternary Science Reviews   230   2020.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

    Scopus

  • Climate variations and Changes in Chinese history

    Hiroto Kajita

    The Archaeological Journal   723   32 - 33   2019.3

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Kind of work:Single Work  

  • Extraordinary cold episodes during the mid-Holocene in the Yangtze delta: Interruption of the earliest rice cultivating civilization

    Hiroto Kajita, Hodaka Kawahata, Ke Wang, Hongbo Zheng, Shouye Yang, Naohiko Ohkouchi, Masayuki Utsunomiya, Bin Zhou, Bang Zheng

    Quaternary Science Reviews   201   418 - 428   2018.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

    Scopus

  • Paleo-climate reconstruction using corals from Kikai Island, Japan

    Hiroto Kajita, Atsuko Yamazaki, Saori Ito, Tsuyoshi Watanabe

    Kaiyo Monthly   60   55 - 62   2017.6

     More details

    Language:Japanese   Publishing type:Part of collection (book)   Kind of work:Joint Work  

  • Holocene sea surface temperature variations recorded in corals from Kikai Island, Japan

    Hiroto Kajita, Atsuko Yamazaki, Takaaki Watanabe, Chung Che Wu, Chuan Chou Shen, Tsuyoshi Watanabe

    Geochemical Journal   51 ( 4 )   e9 - e14   2017

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    Web of Science

    Scopus

▼display all

Review Papers

  • 東南極宗谷海岸沿岸およびシューマッハオアシスの陸水系に存在する脂肪酸の組成

    梶田 展人, 菅沼 悠介, 工藤 栄, 杉山 慎, 大河内 直彦

    日本地質学会学術大会講演要旨集   2023.4

     More details

    Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Kind of work:Joint Work  

  • Zinc stable isotopes as tracers for Zn pollution in sediment cores from historically polluted Lake Biwa and Osaka Bay

    Kai Nitzsche, Toshihiro Yoshimura, Naoto Ishikawa, Hiroto Kajita, Nanako Ogawa, Katz Suzuki, Naohiko Ohkouchi

    Goldschmidt2022 abstracts   2022.1

     More details

    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:European Association of Geochemistry   Kind of work:Joint Work  

  • 下総層群に含まれるアルケノンを用いた古東京湾の古水温復元

    梶田 展人, 中澤 努, 大河内 直彦, 佐藤 都, 原田 尚美, 川幡 穂高

    日本地球化学会第68回年会講演要旨集   2021.12

     More details

    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Kind of work:Joint Work  

  • The advancement of alkenone paleothermometry: applications to coastal, lake, and subaerially exposed sediments

    Hiroto Kajita

    Geochemistry   55 ( 2 )   59 - 60   2021.6

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Kind of work:Single Work  

  • Application of the alkenone paleotemperature reconstruction in Lake Takahoko, Aomori

    Hiroto Kajita, Hideto Nakamura, Naohiko Ohkouchi, Naomi Harada, Miyako Sato, Shinji Ueda, Hodaka Kawahata

    Abstracts of Annual Meeting of the Geochemical Society of Japan   77   2021.1

     More details

    Language:English   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Kind of work:Joint Work  

  • Alkenones synthesized by Isochrydaceae family haptophytes -Case studies in domestic lakes-

    Kajita Hiroto, Nakamura Hideto, Kawahata Hodaka

    Abstracts of Annual Meeting of the Geochemical Society of Japan   66 ( 0 )   48 - 48   2019.11

     More details

    Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:GEOCHEMICAL SOCIETY OF JAPAN   Kind of work:Joint Work  

  • Large cold events induced by El Nino episodes in Funka Bay, northern Japan

    Hodaka Kawahata, Yoshiki Hatta, Hiroto Kajita, Yuki Ota, Kenji Nishida, Masayuki Ikeda, Junko Habu

    Annual Meeting of the Geological Society of Japan   2018 ( 0 )   314 - 314   2018

     More details

    Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:The Geological Society of Japan   Kind of work:Joint Work  

▼display all

Awards

  • 奨励賞

    2023.06

Social Activities

  • 研究者の南極放浪記

    2023.11.27

  • 化石の分析を通して46億年に及ぶ地球の履歴書を書く

    2023.10.23

  • 南極から解き明かす地球環境変動

    2023.08.08

  • 南極沿岸域の地質調査から明らかにする 南極氷床変動史

    2023.07.27

Media Coverage

  • 過去の地球環境の復元

    2023.12.04

  • 「津軽いじん伝」

    2023.06.13

  • 南極の試料1トン分析へ/弘大・梶田助教

    2023.05.08

  • 過去の気候変動を記録する藻類を青森県鷹架沼で発見! – 湖沼堆積物から湖水温を推定する

    2020.06

  • 関東の気温変化再現 東京湾堆積物を分析

    2020.03

  • 研究室の扉「水稲文明を滅ぼしたのは、、、」

    2019.01

  • 失われた長江新石器文明の謎 – 約4200年前の気候変動を海洋堆積物から復元する

    2018.12

  • 東大、約4400年前~3800年前に大規模かつ複数回の急激な気候寒冷化イベントの発生を発見

    2018.12

▼display all