Hokuto Iwatani

Profile Information

Affiliation: Professor (Associate), The Graduate School of Sciences and Technology for Innovation, Yamaguchi University

Degree: Sc.D.(Mar, 2011, Shimane University)

ORCID iD: https://orcid.org/0000-0001-6823-6528
J-GLOBAL ID: 201901018099434521
researchmap Member ID: B000355081

External link: https://sites.google.com/view/iwatani-lab

Research Interests

Research Areas

Natural sciences / Biogeoscience /

Research History

Apr, 2023 - Present

Professor (Associate), Division of Earth Science, The Graduate School of Sciences and Technology for Innovation, Yamaguchi University
Apr, 2019 - Mar, 2023

Assistant Professor, Division of Earth Science, The Graduate School of Sciences and Technology for Innovation, Yamaguchi University
Mar, 2013 - Mar, 2019

PostDoc Position, School of Biological Sciences, The University of Hong Kong
Nov, 2011 - Jun, 2013

PostDoc Position, Department of Earth and Planetary Systems Science, Hiroshima University
Apr, 2011 - Nov, 2011

PostDoc Position, Interdisciplinary Faculty of Science and Engineering, Shimane University

Committee Memberships

Aug, 2023 - Present

日本古生物学会将来計画委員会委員, 日本古生物学会

Awards

Dec, 2024

優秀発表賞, 花粉分析に基づく宮崎県児湯郡鮮新－更新統高鍋層の古環境復元, 日本植生史学会

鳥井夏希, 渡邉正巳, 入月俊明, 岩谷北斗
Mar, 2023

優秀発表賞, 紀伊水道北東部における過去約１万年間の貝形虫化石群集と環境の変化, 日本地質学会西日本支部

小林哉太・入月俊明・天野敦子・岩谷北斗・竹内美優・有元純
Feb, 2023

優秀ポスター賞, 八重山列島周辺海域の現生貝形虫群集, 日本古生物学会

久保観, 岩谷北斗, 佐々木聡史, 片山肇, 杉崎彩子, 板木拓也, 井上卓彦
Jul, 2022

優秀ポスター賞, トカラ列島周辺海域における現生貝形虫群集, 日本古生物学会

中野太賀, 岩谷北斗, 鈴木克明, 板木拓也, 久保観, 佐々木聡史
Jun, 2014

Best Article Award, Temporal changes of Plio-Pleistocene Ostracoda from the Takanabe Formation, Miyazaki Group, Southwest Japan, Paleontological Society of Japan

Hokuto Iwatani, Toshiaki Irizuki, Takashi Goto

Papers

Submarine sediment distribution and its controlling factors around the western areaoff Tokara Islands and southern area off Yakushima Island

Yoshiaki SUZUKI, Takuya ITAKI, Hajime KATAYAMA, Naotomo KANEKO, Yumiko HARIGANE, Naoki SAITO, Hokuto IWATANI, Hiroki MATSUI, Osamu ISHIZUKA, Makoto YAMASAKI …

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN, 75(5-6) 223-248, Dec 27, 2024 Peer-reviewed
Climatic forcing of the Southern Ocean deep-sea ecosystem

Moriaki Yasuhara, Huai-Hsuan May Huang, Raine Wing Ki Chong, Yuanyuan Hong, Hokuto Iwatani, Jingwen Zhang, Katsunori Kimoto, Minoru Ikehara

Current Biology, Dec, 2024 Peer-reviewed
Cenozoic history of the tropical marine biodiversity hotspot

Skye Yunshu Tian, Moriaki Yasuhara, Fabien L Condamine, Huai-Hsuan M Huang, Allan Gil S Fernando, Yolanda M Aguilar, Hita Pandita, Toshiaki Irizuki, Hokuto Iwatani, Caren P Shin …

Nature, Jun 26, 2024 Peer-reviewed
Spatial variations in the modern ostracode fauna in the adjacent sea of Tokara Islands

中野太賀, 岩谷北斗, 鈴木克明, 板木拓也

地質調査研究報告, 74(5-6) 315-324, 2023 Peer-reviewedCorresponding author
Preliminary report of recent ostracode assemblages from the adjacent sea of Tokara Gap

Taiga NAKANO, Hokuto IWATANI, Yoshiaki SUZUKI, Takuya ITAKI, Nozomi KUBO, Satoshi SASAKI

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN, 73(5-6) 329-335, Dec 27, 2022 Peer-reviewedCorresponding author
Benthic ostracod diversity and biogeography in an urbanized seascape

Yuanyuan Hong, Moriaki Yasuhara, Hokuto Iwatani, Paul G. Harnik, Anne Chao, Jonathan D. Cybulski, Yuan Liu, Yuefei Ruan, Xiangdong Li, Chih-Lin Wei

Marine Micropaleontology, 102067-102067, Jun, 2022 Peer-reviewed
Ecosystem turnover in an urbanized subtropical seascape driven by climate and pollution

Yuanyuan Hong, Moriaki Yasuhara, Hokuto Iwatani, Anne Chao, Paul G. Harnik, Chih-Lin Wei

Anthropocene, 36 100304-100304, Dec, 2021 Peer-reviewed
Climate and sea‐level controlling internal architecture of a Quaternary carbonate ramp (Northwest Shelf of Australia)

Maximilian Hallenberger, Lars Reuning, Stefan Back, Stephen J. Gallagher, Hokuto Iwatani, Katja Lindhorst

Sedimentology, Oct 4, 2021 Peer-reviewed
Quaternary equatorial Atlantic deep-sea ostracodes: evidence for a distinct tropical fauna in the deep sea

Moriaki Yasuhara, Hisayo Okahashi, Huai-Hsuan May Huang, Yuanyuan Hong, Hokuto Iwatani, Rachel Wai Ching Chu, Gene Hunt

Journal of Paleontology, 1-41, Aug 11, 2021 Peer-reviewed
Deglacial–Holocene Svalbard paleoceanography and evidence of meltwater pulse 1B

Skye Yunshu Tian, Moriaki Yasuhara, Yuanyuan Hong, Huai-Hsuan M. Huang, Hokuto Iwatani, Wing-Tung Ruby Chiu, Briony Mamo, Hisayo Okahashi, Tine L. Rasmussen

Quaternary Science Reviews, 233(1), Apr, 2020 Peer-reviewed
Benthic community history in the Changjiang (Yangtze River) mega-delta: Damming, urbanization, and environmental control

Richard Ching Wa Cheung, Moriaki Yasuhara, Hokuto Iwatani, Chih-Lin Wei, Yun-wei Dong

Paleobiology, 45(3) 469-483, Jul, 2019 Peer-reviewedCorresponding author
Neogene marine ostracod diversity and faunal composition in Java, Indonesia: Indo-Australian Archipelago biodiversity hotspot and the Pliocene diversity jump

Shin Caren P, Yasuhara Moriaki, Iwatani Hokuto, Kase Tomoki, Fernando Allan Gil S, Hayashi Hiroki, Kurihara Yukito, Pandita Hita

JOURNAL OF CRUSTACEAN BIOLOGY, 39(3) 244-252, May, 2019 Peer-reviewed
Baseline for ostracod-based northwestern Pacific and Indo-Pacific shallow-marine paleoenvironmental reconstructions: ecological modeling of species distributions

Hong Yuanyuan, Yasuhara Moriaki, Iwatani Hokuto, Mamo Briony

BIOGEOSCIENCES, 16(2) 585-604, Feb 1, 2019 Peer-reviewed
Deep-sea ostracod faunal dynamics in a marginal sea: biotic response to oxygen variability and mid-Pleistocene global changes

Huang Huai-Hsuan May, Yasuhara Moriaki, Iwatani Hokuto, Yamaguchi Tatsuhiko, Yamada Katsura, Mamo Briony

PALEOBIOLOGY, 45(1) 85-97, Feb, 2019 Peer-reviewedCorresponding author
Recent ostracode assemblages from Shushi Bay, Tsushima Island, southwestern Japan and their ecological and zoogeographical characteristics

Toshiaki Irizuki, Yuki Fujihara, Hokuto Iwatani, Shigenori Kawano

Laguna, 25 39-54, Dec, 2018 Peer-reviewed
The enigma of rare Quaternary oolites in the Indian and Pacific Oceans: A result of global oceanographic physicochemical conditions or a sampling bias?

S.J. Gallagher, L. Reuning, T. Himmler, J. Henderiks, D. De Vleeschouwer, J. Groeneveld, A. Rastegar Lari, C.S. Fulthorpe, K. Bogus, W. Renema …

Quaternary Science Reviews, 200 114-122, Nov, 2018 Peer-reviewed
Benthic Biotic Response to Climate Changes Over the Last 700,000Years in a Deep Marginal Sea: Impacts of Deoxygenation and the Mid-Brunhes Event

Huang Huai-Hsuan M, Yasuhara Moriaki, Iwatani Hokuto, Zarikian Carlos, A. Alvarez, Bassetti Maria-Angela, Sagawa Takuya

PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY, 33(7) 766-777, Jul, 2018 Peer-reviewed
Intermediate-water dynamics and ocean ventilation effects on the Indonesian Throughflow during the past 15,000 years: Ostracod evidence

Hokuto Iwatani, Moriaki Yasuhara, Yair Rosenthal, Braddock K. Linsley

Geology, 46(6) 567, May, 2018 Peer-reviewedLead authorCorresponding author
Decadal- to Centennial-Scale East Asian Summer Monsoon Variability Over the Past Millennium: An Oceanic Perspective

Cheung Richard, Ching Wa, Yasuhara Moriaki, Mamo Briony, Katsuki Kota, Seto Koji, Takata Hiroyuki, Yang Dong-Yoon, Nakanishi Toshimichi, Yamada Katsura …

Geophysical Research Letters, 45(15) 7711‐7718-7718, 2018 Peer-reviewed
Cenozoic dynamics of shallow‐marine biodiversity in the Western Pacific

Moriaki Yasuhara, Hokuto Iwatani, Gene Hunt, Hisayo Okahashi, Tomoki Kase, Hiroki Hayashi, Toshiaki Irizuki, Yolanda M. Aguilar, Allan Gil S. Fernando, Willem Renema

Journal of Biogeography, 44(3) 567-578, Oct, 2017 Peer-reviewed

Misc.

Primary report of marine sediment collecting survey in Kiisuido Strait

(83) 13-26, Apr, 2022
沖縄本島西部沖東シナ海における表層堆積物中の現生貝形虫群集（予報）

岩谷北斗, 入月俊明

地質調査総合センター速報, (51) 143-147, 2010 Lead authorCorresponding author
GH08航海により沖縄島東部沖太平洋にて採取された表層堆積物中の現生貝形虫群集（予報）

岩谷北斗, 入月俊明

地質調査総合センター速報, (46) 148-152, 2009 Lead authorCorresponding author

Presentations

宮崎県児湯郡鮮新－更新統高鍋層における花粉分析を用いた古環境復元

鳥井夏希, 渡辺正巳, 入月俊明, 岩谷北斗

日本古生物学会2025年年会, Jun 29, 2025
東南極リュツォ・ホルム湾に生息する八放サンゴ類の多様性の解明

高橋拓暉, 徳田悠希, 野中正法, 自見直人, 岩谷北斗, 松井浩紀, 柴田大輔, 石輪, 健樹, 山縣広和, 巻俊宏, 板木拓也, 菅沼悠介

日本古生物学会2025年年会, Jun 28, 2025
東南極リュツォ・ホルム湾に生息する八放サンゴ類の多様性の解明

高橋拓暉, 徳田悠希, 野中正法, 自見直人, 岩谷北斗, 松井浩紀, 柴田大輔, 石輪健樹, 菅沼悠介, 山縣広和, 巻俊宏, 板木拓也

日本動物分類学会第60回大会, Jun 7, 2025
花粉分析に基づく宮崎県児湯郡鮮新－更新統高鍋層の古環境復元

鳥井夏希, 渡邉正巳, 入月俊明, 岩谷北斗

日本植生史学会第39回大会, Dec, 2024
第65次南極地域観測隊で採取された東南極の海底堆積物の速報

松井浩紀, 自見直人, 岩谷北斗, 徳田悠希, 石輪健樹, 鈴木克明, 板木拓也, 菅沼悠介

第10回地球環境史学会年会 2024年11月 - 2024年11月, Nov, 2024
東南極リュツォ・ホルム湾の葉上性貝形虫類

中里政貴, 岩谷北斗, 佐々木聡史, 徳田悠希, 石輪健樹, 板木拓也, 菅沼悠介

日本地質学会第131年学術大会, Sep 10, 2024
東南極におけるベントス相調査〜極地巨大化現象の謎〜

自見直人, 松井浩紀, 岩谷北斗, 石輪健樹, Sau Pinn Wo, 山縣広和, 巻俊宏, 田村岳史, 菅沼悠介, 徳田悠希

日本プランクトン学会・日本ベントス学会合同大会2024, Sep, 2024
トカラ列島宝島西方海域の完新世貝形虫群集の時系列変化

上野智広, 岩谷北斗, 鈴木克明, 板木拓也, 清家弘治, 中野太賀

日本古生物学会2024年年会, Jun 22, 2024
現生と化石貝形虫群集解析に基づく紀伊水道北東部における過去約１万年間の環境の変化

小林哉太, 入月俊明, 竹内美優, 岩谷北斗, 有元純, 天野敦子

第１５回汽水域研究会, Oct, 2023
鮮新統宮崎層群生目層の貝形虫化石と古底層環境

矢野稜真, 岩谷北斗

日本地質学会第130年学術大会, Sep 19, 2023
過去1万2千年間におけるトカラ列島宝島西方海域の古底層環境変遷

上野智広, 岩谷北斗, 鈴木克明, 板木拓也, 清家弘治, 中野太賀

日本地質学会第130年学術大会, Sep 18, 2023
紀伊水道における貝形虫群集の時空間変動と黒潮との関係

竹内美優, 岩谷北斗, 天野敦子, 入月俊明, 有元純, 鈴木克明, 板木拓也

日本地質学会第130年学術大会, Sep 18, 2023
CDW caused ice shelf collapse and subsequent ice sheet thinning in LützowHolm Bay, East Antarctica

Yusuke Suganuma, Takuya Itaki, Yuki Haneda, Takeshige Ishiwa, Kazuya Kusahara, Takashi Obase, Osamu Seki, Takayuki Omori, Minoru Ikehara, Yuji Kato, Atsuko Amano, Hokuto Iwatani, Jun'ichi Okuno, Hideki Miura

INSTANT 2023, Sep, 2023
The effect of Kuroshio on deep-sea ecosystems in Tokara Islands, southwest Japan

Taiga NAKANO, Hokuto IWATANI, Takuya ITAKI, Yoshiaki SUZUKI, Naoki SAITO

2nd Asian Palaeontological Congress, Aug 7, 2023
The influence of Kuroshio on the bottom environment and benthic fauna in Tokara Islands

Taiga Nakano, Hokuto Iwatani, Yoshiaki Suzuki, Takuya Itaki, Naoki Saito

Japan Geoscience Union Meeting 2023, May, 2023
八重山列島周辺海域の現生貝形虫群集

久保観, 岩谷北斗, 佐々木聡史, 片山肇, 杉崎彩子, 板木拓也, 井上卓彦

日本古生物学会第 172 回例会, Feb 4, 2023
紀伊水道における現生貝形虫群集の水平分布とNeomonoceratina delicataの発見

竹内美優, 岩谷北斗, 天野敦子, 有元純, 鈴木克明, 板木拓也, 入月俊明

日本地質学会第129年学術大会, Sep, 2022
トカラ列島周辺海域における現生貝形虫群集

中野太賀, 岩谷北斗, 鈴木克明, 板木拓也, 久保観, 佐々木聡史

日本古生物学会2022年年会, Jul 2, 2022
Temporal changes of ostracod assemblages and paleoenvironments over the past 10,000 years in the northeastern part of the Kii Channel

Mar 4, 2022
Recent ostracode assemblages from Ishigaki and Iriomote islands, Okinawa Prefecture

Nozomi Kubo, Hokuto Iwatani

Jul, 2021

Professional Memberships

Research Projects

超長期生物モニタリングから解明する東南極氷床の変動史

科学研究費助成事業, 基盤研究(C), 日本学術振興会, Apr, 2024 - Mar, 2027

岩谷北斗
Elucidation of sea-level changes around the Kii Peninsula during the late Quaternary based on integrated analysis of microfossils

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2026

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