Researcher Information

NAKAMURA Hideto

Assistant Professor

Diving deep into Earth's molecular memories

Department of Earth and Planetary Sciences, Earth and Planetary System Science

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Theme

Investigating Earth's life history and environmental changes through organic molecules in sediments

FieldOrganic Geochemistry, Molecular Paleontology, Paleobotany
KeywordMolecular fossils, Terrestrial ecosystems, Microalgae, Development of paleoenvironmental proxies, Paleoenvironmental reconstruction, Molecular fossils of extinct organisms (Paleochemistry of natural products), Evolution of biosynthetic pathways and their geological evidence

Introduction of Research

Throughout Earth's history, organic matter produced by living organisms has been partially preserved in the geosphere. Certain compounds with characteristics that can identify their biological origins, called biomarkers (molecular fossils), provide valuable clues for elucidating the evolution and diversity changes of past ecosystems, including organisms that are poorly preserved as conventional fossils. We focus on lipid molecules derived from plants and algae, investigating how species composition, environment, and preservation processes are reflected in molecular compositions. Based on these findings, we work on reconstructing Earth's life history and environmental changes using molecular fossils.

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Paleovegetation and paleoenvironmental information recorded in molecular fossils
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Conducting GC-MS analysis. Excited about the results!

Representative Achievements

Large igneous province activity drives oceanic anoxic event 2 environmental change across eastern Asia, R. Takashima, D. Selby, T. Yamanaka, Y. Kuwahara, H. Nakamura, K. Sawada, M. A. Ikeda, T. Ando, K. Hayashi, M. Nishida, T. Usami, D. Kameyama, H. Nishi, A. Kuroyanagi and B. R. Gyawali, Communications Earth & Environment, 2024, 5, Article number 85 (2024).
Plant-derived triterpenoid biomarkers and their applications in paleoenvironmental reconstructions: chemotaxonomy, geological alteration, and vegetation reconstruction, H. Nakamura, Researches in Organic Geochemistry, 2019,
Novel alkenone-producing strains of genus Isochrysis (Haptophyta) isolated from Canadian saline lakes show temperature sensitivity of alkenones and alkenoates, H. Araie*, H. Nakamura*, J. L. Toney, H. A. Haig, J. Plancq, T. Shiratori, P. R. Leavitt, O. Seki, K. Ishida, K. Sawada, I. Suzuki and Y. Shiraiwa (*equal contribution), Organic Geochemistry, 2018, 121, 89-103.
Long chain alkenes, alkenones and alkenoates produced by the haptophyte alga Chrysotila lamellosa CCMP1307 isolated from a salt marsh, H. Nakamura, K. Sawada, H. Araie, I. Suzuki and Y. Shiraiwa, Organic Geochemistry, 2014, 66, 90-97.
Aliphatic and aromatic terpenoid biomarkers in Cretaceous and Paleogene angiosperm fossils from Japan, H. Nakamura, K. Sawada and M. Takahashi, Organic Geochemistry, 2010, 41, 975-980
Academic degreePh. D.
Self Introduction

Born in Sapporo and raised in Kyoto, I'm a researcher with hobbies of playing shinobue (Japanese flute) and photography when I'm not in the lab.
I'm always curious about plants, the silent storytellers of our terrestrial ecosystems. I decode their ancient history through fossils and molecules, piecing together a botanical puzzle spanning millions of years in a multidisciplinary way.
My favorite vegetable is the turnip - a preference completely unrelated to my research.

Academic background2006 B.Sc., Earth and Planetary Sciences, School of Science, Hokkaido University
2008 M.Sc., Natural History Sciences, Graduate School of Science, Hokkaido University
2011 Ph.D., Natural History Sciences, Graduate School of Science, Hokkaido University
2011-2016 Postdoctoral Researcher, Faculty of Science, Hokkaido University / JST CREST
2016-2021 Specially Appointed Lecturer, Graduate School of Science, Osaka City University (now Osaka Metropolitan University)
2021-present Assistant Professor, Faculty of Science, Hokkaido University
Affiliated academic societyThe Geological Society of Japan, The Geochemical Society of Japan, The Japanese Association of Organic Geochemists, Japan Geoscience Union, PALEO10: Paleoscience Society, Japanese Association of Historial Botany
Room addressScience Building 6 6-904

Department of Earth and Planetary Sciences, Earth and Planetary System Science

NAKAMURA Hideto

Assistant Professor

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What is your dream that you want to achieve through your research?

My dream is to vividly reconstruct the ecosystems of geological eras and their transitions through molecular fossils. While extracting paleoenvironmental information from sedimentary organic matter poses significant challenges, we’re addressing these through a multifaceted approach, collaborating with researchers from various fields. Our work spans from biomolecular analysis to the examination of geological samples. What truly excites me in this pursuit is the prospect of uncovering unique molecular fossils from extinct taxa among unidentified compounds. This could potentially unravel the mysteries of past ecosystems and lost biosynthetic pathways. Through this endeavor, I aim to deepen our understanding of Earth’s life history and contribute to shaping humanity’s perspective on natural history, all while eagerly anticipating these thrilling discoveries.

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What made you decide to become a researcher?

Since childhood, I’ve been curious about nature, enjoying fishing, plant observation, and mineral collecting. These experiences sparked my interest in natural sciences. Although my interests often changed, university studies in earth sciences deeply engaged me. As I learned more, the world seemed more complex and fascinating. Also, I gained skills to explore my interests on my own, keeping my brain fed. Research has its challenges, but its depth motivates me to keep pushing myself.

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Please tell us about yourself; things you are good at, your favorites, hobbies, and daily routines.

As a daily pleasure, I enjoy exploring the latest technology, from computers, smartphones, and cameras to research equipment. I often try out new features and find useful ways to use them. This hobby started from simple curiosity, but surprisingly, it has given me skills that help my research. There’s a saying, “A good craftsman never blames his tools,” but interestingly, even experts often choose the right tools for each situation. Knowing good tools and how to use them well can sometimes speed up research. I’ve also been playing the “shinobue”(Japanese flute) and creating music for many years. This improves my creativity and focus, offering benefits beyond just a refreshment. I feel very lucky that my hobbies and research work so well together in ways I didn’t expect.

3D-printed lab tool (left) and accessories (right) inspired by research subjects. Created as part of personal creative activities.