Updated on 2025/06/06

写真a

 
YAMANAKA Masahiro
 
Organization
Institute for Planetary Materials Chief super technician
Position
Chief super technician
External link

Degree

  • 博士(理学) ( 2013.3   金沢大学 )

  • Doctor of Science ( 2013.3   Kanazawa University )

  • 修士(理学) ( 2010.3   金沢大学 )

  • Master of Science ( 2010.3   Kanazawa University )

  • 学士(理学) ( 2008.3   金沢大学 )

Research Areas

  • Life Science / Molecular biology

Education

  • Kanazawa University   大学院自然科学研究科   生命科学専攻

    2010.4 - 2013.3

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  • Kanazawa University   大学院自然科学研究科   生物科学専攻

    2008.4 - 2010.3

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  • Kanazawa University   理学部   生物学科

    2004.4 - 2008.3

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Research History

  • Okayama University   The Institute for Planetary Materials   Chief Supertechnician

    2013.4

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Papers

  • Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material

    Ryoji Tanaka, Dilan M. Ratnayake, Tsutomu Ota, Noah Miklusicak, Tak Kunihiro, Christian Potiszil, Chie Sakaguchi, Katsura Kobayashi, Hiroshi Kitagawa, Masahiro Yamanaka, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Tomohiro Usui, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Eizo Nakamura

    The Astrophysical Journal   965 ( 1 )   52 - 52   2024.4

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    Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    Abstract

    The analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge of the evolution of early solar system materials. However, no consensus has been obtained on the chronological data, which is important for understanding the evolution of the asteroid Ryugu. Here, the aqueous alteration age of Ryugu particles was determined by the Mn–Cr method using bulk samples, yielding an age of 4.13 + 0.62/−0.55 Myr after the formation of Ca–Al-rich inclusions (CAI). The age corresponds to 4563.17 + 0.60/−0.67 Myr ago. The higher 55Mn/52Cr, ε 54Cr, and initial ε 53Cr values of the Ryugu samples relative to any carbonaceous chondrite samples implies that its progenitor body formed from the least thermally processed precursors in the outermost region of the protoplanetary disk. Despite accreting at different distances from the Sun, the hydrous asteroids (Ryugu and the parent bodies of CI, CM, CR, and ungrouped C2 meteorites) underwent aqueous alteration during a period of limited duration (3.8 ± 1.8 Myr after CAI). These ages are identical to the crystallization age of the carbonaceous achondirtes NWA 6704/6693 within the error. The ε 54Cr and initial ε 53Cr values of Ryugu and NWA 6704/6693 are also identical, while they show distinct Δ'17O values. This suggests that the precursors that formed the progenitor bodies of Ryugu and NWA 6703/6693 were formed in close proximity and experienced a similar degree of thermal processing in the protosolar nebula. However, the progenitor body of Ryugu was formed by a higher ice/dust ratio, than NWA6703/6693, in the outer region of the protoplanetary disk.

    DOI: 10.3847/1538-4357/ad276a

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    Other Link: https://iopscience.iop.org/article/10.3847/1538-4357/ad276a/pdf

  • The Formation of a Rubble Pile Asteroid: Insights from the Asteroid Ryugu Reviewed

    Tsutomu Ota, Christian Potiszil, Katsura Kobayashi, Ryoji Tanaka, Hiroshi Kitagawa, Tak Kunihiro, Chie Sakaguchi, Masahiro Yamanaka, Eizo Nakamura

    Universe   2023.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/universe9060293

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  • Organic Matter in the Asteroid Ryugu: What We Know So Far Invited Reviewed

    Christian Potiszil, Masahiro Yamanaka, Chie Sakaguchi, Tsutomu Ota, Hiroshi Kitagawa, Tak Kunihiro, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura

    Life   2023.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/life13071448

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  • Detection of Meteoritic Amino Acids in Extremely Small Sample Sizes: Implications for Sample Return Missions

    Christian Potiszil, Masahiro Yamanaka, Tsutomu Ota, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura

    2023.3

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    Publisher:MDPI AG  

    Unmetamorphosed carbonaceous chondrites provide important information concerning the formation and evolution of organic matter, such as amino acids. However, terrestrial contamination remains a valid concern when investigating the organic inventory of meteorites that have fallen to Earth. Accordingly, JAXA’s Hayabusa2 and NASA’s OSIRIS-REx have been launched with the task of returning uncontaminated C-type asteroid material to Earth. The successful Hayabusa2 mission has a very limited sample size (5.4 g). Therefore, many conventional compound specific techniques will struggle to detect amino acids above detection limit with available sample amounts (~several mg to 10’s of mg) being much smaller than those typically used. Here a novel method utilizing ultrahigh performance liquid chromatography-Orbitrap-mass spectrometry is validated and applied to very small meteorite samples, thus providing an approach that can overcome the small sample size constraints of sample return missions. The method is highly sensitive, enabling the detection of amino acids in the carbonaceous chondrites Murchison (2.28 mg) and Orgueil (2.30 mg). Furthermore, quantitation was possible for many of the detected amino acids in Murchison and Orgueil. Using the data presented here, both the amino acid reservoirs of Murchison and Orgueil and the potential application of this method to sample return samples are discussed.

    DOI: 10.20944/preprints202302.0374.v2

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  • Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu

    Christian Potiszil, Tsutomu Ota, Masahiro Yamanaka, Chie Sakaguchi, Katsura Kobayashi, Ryoji Tanaka, Tak Kunihiro, Hiroshi Kitagawa, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Tomohiro Usui, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Eizo Nakamura

    Nature Communications   14 ( 1 )   2023.3

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of life on Earth. While many meteoritic amino acids are considered indigenous, deciphering the extent of terrestrial contamination remains an issue. The Ryugu asteroid fragments (JAXA Hayabusa2 mission), represent the most uncontaminated primitive extraterrestrial material available. Here, the concentrations of amino acids from two particles from different touchdown sites (TD1 and TD2) are reported. The concentrations show that N,N-dimethylglycine (DMG) is the most abundant amino acid in the TD1 particle, but below detection limit in the other. The TD1 particle mineral components indicate it experienced more aqueous alteration. Furthermore, the relationships between the amino acids and the geochemistry suggest that DMG formed on the Ryugu progenitor body during aqueous alteration. The findings highlight the importance of aqueous chemistry for defining the ultimate concentrations of amino acids in primitive extraterrestrial samples.

    DOI: 10.1038/s41467-023-37107-6

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    Other Link: https://www.nature.com/articles/s41467-023-37107-6

  • On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

    Eizo NAKAMURA, Katsura KOBAYASHI, Ryoji TANAKA, Tak KUNIHIRO, Hiroshi KITAGAWA, Christian POTISZIL, Tsutomu OTA, Chie SAKAGUCHI, Masahiro YAMANAKA, Dilan M. RATNAYAKE, Havishk TRIPATHI, Rahul KUMAR, Maya-Liliana AVRAMESCU, Hidehisa TSUCHIDA, Yusuke YACHI, Hitoshi MIURA, Masanao ABE, Ryota FUKAI, Shizuho FURUYA, Kentaro HATAKEDA, Tasuku HAYASHI, Yuya HITOMI, Kazuya KUMAGAI, Akiko MIYAZAKI, Aiko NAKATO, Masahiro NISHIMURA, Tatsuaki OKADA, Hiromichi SOEJIMA, Seiji SUGITA, Ayako SUZUKI, Tomohiro USUI, Toru YADA, Daiki YAMAMOTO, Kasumi YOGATA, Miwa YOSHITAKE, Masahiko ARAKAWA, Atsushi FUJII, Masahiko HAYAKAWA, Naoyuki HIRATA, Naru HIRATA, Rie HONDA, Chikatoshi HONDA, Satoshi HOSODA, Yu-ichi IIJIMA, Hitoshi IKEDA, Masateru ISHIGURO, Yoshiaki ISHIHARA, Takahiro IWATA, Kosuke KAWAHARA, Shota KIKUCHI, Kohei KITAZATO, Koji MATSUMOTO, Moe MATSUOKA, Tatsuhiro MICHIKAMI, Yuya MIMASU, Akira MIURA, Tomokatsu MOROTA, Satoru NAKAZAWA, Noriyuki NAMIKI, Hirotomo NODA, Rina NOGUCHI, Naoko OGAWA, Kazunori OGAWA, Chisato OKAMOTO, Go ONO, Masanobu OZAKI, Takanao SAIKI, Naoya SAKATANI, Hirotaka SAWADA, Hiroki SENSHU, Yuri SHIMAKI, Kei SHIRAI, Yuto TAKEI, Hiroshi TAKEUCHI, Satoshi TANAKA, Eri TATSUMI, Fuyuto TERUI, Ryudo TSUKIZAKI, Koji WADA, Manabu YAMADA, Tetsuya YAMADA, Yukio YAMAMOTO, Hajime YANO, Yasuhiro YOKOTA, Keisuke YOSHIHARA, Makoto YOSHIKAWA, Kent YOSHIKAWA, Masaki FUJIMOTO, Sei-ichiro WATANABE, Yuichi TSUDA

    Proceedings of the Japan Academy, Series B   98 ( 6 )   227 - 282   2022.6

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Academy  

    DOI: 10.2183/pjab.98.015

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  • The trace element composition of chondrule constituents: Implications for sample return methodologies and the chondrule silicate reservoir

    Tak Kunihiro, Tsutomu Ota, Masahiro Yamanaka, Christian Potiszil, Eizo Nakamura

    METEORITICS & PLANETARY SCIENCE   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/maps.13665

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13665

  • A Method to Suppress Isobaric and Polyatomic Interferences for Measurements of Highly Siderophile Elements in Desilicified Geological Samples

    Xiaoyu Zhou, Ryoji Tanaka, Masahiro Yamanaka, Chie Sakaguchi, Eizo Nakamura

    GEOSTANDARDS AND GEOANALYTICAL RESEARCH   43 ( 4 )   611 - 633   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/ggr.12280

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ggr.12280

  • Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite

    Eizo Nakamura, Tak Kunihiro, Tsutomu Ota, Chie Sakaguchi, Ryoji Tanaka, Hiroshi Kitagawa, Katsura Kobayashi, Masahiro Yamanaka, Yuri Shimaki, Gray E. Bebout, Hitoshi Miura, Tetsuo Yamamoto, Vladimir Malkovets, Victor Grokhovsky, Olga Koroleva, Konstantin Litasov

    PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES   95 ( 4 )   165 - 177   2019.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2183/pjab.95.013

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  • Determination of Abundances of Fifty-Two Elements in Natural Waters by ICP-MS with Freeze-Drying Pre-concentration

    Que D. Hoang, Tak Kunihiro, Chie Sakaguchi, Masahiro Yamanaka, Hiroshi Kitagawa, Eizo Nakamura

    GEOSTANDARDS AND GEOANALYTICAL RESEARCH   43 ( 1 )   147 - 161   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/ggr.12245

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ggr.12245

  • Purification and Characterization of Coacervate-Forming Cuticular Proteins from Papilio xuthus Pupae

    Yamanaka Masahiro, Ishizaki Yumi, Nakagawa Taro, Taoka Azuma, Fukumori Yoshihiro

    Zoological science   30 ( 7 )   534 - 542   2013.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Zoological Society of Japan  

    DOI: 10.2108/zsj.30.534

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Presentations

  • ナミアゲハの蛹で見つかった温度感受性タンパク質

    日本生化学会北陸支部 第29回大会  2011.5.28 

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Research Projects

  • Development of a method for detecting traces of biological activity using multi-transition metal stable isotopes

    Grant number:23K17707  2023.06 - 2026.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    田中 亮吏, 山中 正博

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    Grant amount:\6240000 ( Direct expense: \4800000 、 Indirect expense:\1440000 )

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