• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Tolerance of cancer cells against amino acids deprivation in tumor microenvironments

Research Project

Project/Area Number 19H03496
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Tsuyoshi Osawa  東京大学, 先端科学技術研究センター, 准教授 (50567592)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywordsがん微小環境 / アミノ酸 / がん代謝 / 転写・代謝制御
Outline of Research at the Start

腫瘍微小環境はがんの増殖・転移・浸潤・薬剤耐性などの悪性化に重要な役割を果たす。本研究は、腫瘍微小環境におけるアミノ酸代謝適応機構の解明を目的とし、腫瘍微小環境における(1)アミノ酸欠乏感知機構の解明、(2)アミノ酸欠乏に対する細胞適応機構の解析、(3)低酸素・低栄養・低pHのストレス適応とアミノ酸代謝のクロストークの解明、及び、(4)現存する化学療法との併用における相乗効果の検討、について検討する。本研究から低栄養で悪性化するがん細胞を攻略する画期的ながん治療法の開発や、難治性疾患である先天性アミノ酸代謝異常疾患の病態生理解明や治療法開発にも応用可能である。

Outline of Final Research Achievements

The tumor microenvironment plays an important role in canecr malignancy, such as metastasis, invasion, and drug resistance. Cancer cells in the extreme tumor microenvironment of hypoxia, nutrition deprivation and acidic pH contribute to cancer malignancy through the glycolysis, acetate metabolism, and glutamine metabolic adaptations through transcriptional regulation of HIF1α, ATF4, and SREBP2. This study aimed to elucidate the mechanisms of adaptation to amino acid metabolism in tumor microenvironment, including elucidation of (1) sensor for amino acid deficiency, (2) adaptive mechanism to amino acid deficiency of cancer cells, (3) cross-talk between stress adaptation to hypoxia, nutrient deprivation and acidic pH through amino acid metabolism and found a novel adaptive mechanism for amino acid deprivation.

Academic Significance and Societal Importance of the Research Achievements

本研究における、アミノ酸欠乏・適応機構の解析から、mTOR非依存的なアミノ酸適応機構を同定しつつあり、さらに、オルガネラレベルでの解析から、ミトコンドリアや小胞体が1アミノ酸の欠乏でダイナミックに変動することを見出している。現在、オルガネラ動態と単1細胞の遺伝子発現をリンクさせ、アミノ酸感知・適応機構を引き続き検討している。また、環境ストレス適応とアミノ酸代謝のクロストークの解明から、ストレス適応と協調的に働く、mTOR複合体を介さない新たなストレスシグナル経路を見出した。このようにアミノ酸欠乏・適応機構の解明は、将来的にがんや生活習慣病の画期的な治療標的となることが期待できる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (48 results)

All 2023 2022 2021 2020 2019 Other

All Journal Article (21 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 21 results,  Open Access: 17 results) Presentation (19 results) (of which Int'l Joint Research: 4 results,  Invited: 18 results) Book (3 results) Remarks (1 results) Patent(Industrial Property Rights) (4 results)

  • [Journal Article] Convergent Genomic Diversity and Novel BCAA Metabolism in Intrahepatic Cholangiocarcinoma2023

    • Author(s)
      Kitagawa A, Osawa T, Noda M, Kobayashi Y, et al. and Mimori K.
    • Journal Title

      Br. J. Cancer

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cancer Metabolism within the Tumor Microenvironments2023

    • Author(s)
      Aki S, Nakahara R, Maeda K, Osawa T
    • Journal Title

      BBA

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Metabolic adaptations of cancer in extreme tumor microenvironments2023

    • Author(s)
      Ryuichi Nakahara、Keisuke Maeda、Sho Aki、Tsuyoshi Osawa
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 4 Pages: 1200-1207

    • DOI

      10.1111/cas.15722

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] NRF3 activates mTORC1 arginine-dependently for cancer cell viability2023

    • Author(s)
      Hirose Shuuhei、Waku Tsuyoshi、Tani Misato、Masuda Haruka、Endo Keiko、Ashitani Sanae、Aketa Iori、Kitano Hina、Nakada Sota、Wada Ayaka、Hatanaka Atsushi、Osawa Tsuyoshi、Soga Tomoyoshi、Kobayashi Akira
    • Journal Title

      iScience

      Volume: 26 Issue: 2 Pages: 106045-106045

    • DOI

      10.1016/j.isci.2023.106045

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pathological complete remission of relapsed tumor by photo‐activating antibody-mimetic drug conjugate treatment2022

    • Author(s)
      Kaneko Yudai、Yamatsugu Kenzo、Yamashita Takefumi、Takahashi Kazuki、Tanaka Toshiya、Aki Sho、Tatsumi Toshifumi、Kawamura Takeshi、Miura Mai、Ishii Masazumi、Ohkubo Kei、Osawa Tsuyoshi、Kodama Tatsuhiko、Ishikawa Shumpei、Tsukagoshi Masanobu、Chansler Michael、Sugiyama Akira、Kanai Motomu、Katoh Hiroto
    • Journal Title

      Cancer Science

      Volume: 113 Issue: 12 Pages: 4350-4362

    • DOI

      10.1111/cas.15565

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Glutamine deficiency in solid tumor cells confers resistance to ribosomal RNA synthesis inhibitors2022

    • Author(s)
      Melvin Pan、Christiane Zorbas、Maki Sugaya、Kensuke Ishiguro、Miki Kato、Miyuki Nishida、Hai-Feng Zhang、Marco M. Candeias、Akimitsu Okamoto、Takamasa Ishikawa、Tomoyoshi Soga、Hiroyuki Aburatani、Juro Sakai、Yoshihiro Matsumura、Tsutomu Suzuki、Christopher G. Proud、Denis L. J. Lafontaine、Tsuyoshi Osawa
    • Journal Title

      Nature Communications

      Volume: 13(1) Issue: 1 Pages: 3706-3706

    • DOI

      10.1038/s41467-022-31418-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Metagenomic identification of microbial signatures predicting pancreatic cancer from a multinational study2022

    • Author(s)
      Nagata N, Nishijima S, Kojima Y, Hisada Y, Imbe K, Miyoshi-Akiyama T, Suda W, Kimura M, Aoki R, Sekine K, Ohsugi M, Miki K, Osawa T, Ueki T, Oka S, Mizokami M, Kartal E, Schmidt TSB, Molina-Montes E, Estudillo L, Malats N, Trebicka J, Kersting S, Langheinrich M, Bork P, Uemura N, Itoi T, and Kawai T
    • Journal Title

      Gastroenterology

      Volume: 163 Issue: 1 Pages: 222-238

    • DOI

      10.1053/j.gastro.2022.03.054

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Selective PPARα Modulator Pemafibrate and Sodium-Glucose Cotransporter 2 Inhibitor Tofogliflozin Combination Treatment Improved Histopathology in Experimental Mice Model of Non-Alcoholic Steatohepatitis2022

    • Author(s)
      Murakami K, Sasaki Y, Asahiyama M, Yano W, Takizawa T, Kamiya W, Matsumura Y, Anai M, Osawa T, Fruchart JC, Fruchart-Najib J, Aburatani H, Sakai J, Kodama T, Tanaka T.
    • Journal Title

      Cells

      Volume: 11 Issue: 4 Pages: 720-720

    • DOI

      10.3390/cells11040720

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Antibody mimetic drug conjugate manufactured by high-yield Escherichia coli expression and non-covalent binding system2022

    • Author(s)
      Yamatsugu Kenzo、Katoh Hiroto、Yamashita Takefumi、Takahashi Kazuki、Aki Sho、Tatsumi Toshifumi、Kaneko Yudai、Kawamura Takeshi、Miura Mai、Ishii Masazumi、Ohkubo Kei、Osawa Tsuyoshi、Kodama Tatsuhiko、Ishikawa Shumpei、Kanai Motomu、Sugiyama Akira
    • Journal Title

      Protein Expression and Purification

      Volume: 192 Pages: 106043-106043

    • DOI

      10.1016/j.pep.2021.106043

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Metagenomic identification of microbial signatures predicting pancreatic cancer from a multinational study2022

    • Author(s)
      Nagata et al.
    • Journal Title

      Gastroenterology

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Selective PPARα Modulator Pemafibrate and Sodium-Glucose Cotransporter 2 Inhibitor Tofogliflozin Combination Treatment Improved Histopathology in Experimental Mice Model of Non-Alcoholic Steatohepatitis2022

    • Author(s)
      Murakami et al.
    • Journal Title

      Cells

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Antibody mimetic drug conjugate manufactured by high-yield Escherichia coli expression and non-covalent binding system2022

    • Author(s)
      Yamatsugu et al.
    • Journal Title

      Protein Expr Purif.

      Volume: - Pages: 106043-106043

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Metabolic flexibility via mitochondrial BCAA carrier SLC25A44 is required for optimal fever2021

    • Author(s)
      Yoneshiro T, Kataoka N, Walejko JM, Ikeda K, Brown Z, Yoneshiro M, Crown SB, Osawa T, Sakai J, McGarrah RW, White PJ, Nakamura K, Kajimura S.
    • Journal Title

      Elife

      Volume: 10

    • DOI

      10.7554/elife.66865

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Loss of Down syndrome critical region-1 leads to cholesterol metabolic dysfunction that exaggerates hypercholesterolemia in ApoE-null background2021

    • Author(s)
      Muramatsu Masashi、Osawa Tsuyoshi、Miyamura Yuri、Nakagawa Suguru、Tanaka Toshiya、Kodama Tatsuhiko、Aburatani Hiroyuki、Sakai Juro、Ryeom Sandra、Minami Takashi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100697-100697

    • DOI

      10.1016/j.jbc.2021.100697

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] TET1 upregulation drives cancer cell growth through aberrant enhancer hydroxymethylation of HMGA2 in hepatocellular carcinoma.2021

    • Author(s)
      Shirai K, Nagae G, Seki M, Kudo Y, Kamio A, Hayashi A, Okabe A, Ota S, Tsutsumi S, Fujita T, Yamamoto S, Nakaki R, Kanki Y, Osawa T, Midorikawa Y, Tateishi K, Ichinose M, Aburatani H.
    • Journal Title

      Cancer Sci.

      Volume: 112 Issue: 7 Pages: 2855-2869

    • DOI

      10.1111/cas.14897

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Floxuridine Oligomers Activated under Hypoxic Environment2021

    • Author(s)
      Morihiro, K.; Ishinabe, T.; Takatsu, M.; Osumi, H.; Osawa, T.; Okamoto, A.
    • Journal Title

      J. Am. Chem. Soc.

      Volume: 143 Issue: 9 Pages: 3340-3347

    • DOI

      10.1021/jacs.0c10732

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss of Down Syndrome Critical Region-1 Mediated-Hypercholesterolemia Accelerates Corneal Opacity Via Pathological Neovessel Formation2020

    • Author(s)
      Muramatsu Masashi、Nakagawa Suguru、Osawa Tsuyoshi、Toyono Tetsuya、Uemura Akiyoshi、Kidoya Hiroyasu、Takakura Nobuyuki、Usui Tomohiko、Ryeom Sandra、Minami Takashi
    • Journal Title

      Arteriosclerosis, Thrombosis, and Vascular Biology

      Volume: 40 Issue: 10 Pages: 2425-2439

    • DOI

      10.1161/atvbaha.120.315003

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pemafibrate, a selective PPARα modulator, prevents non-alcoholic steatohepatitis development without reducing the hepatic triglyceride content.2020

    • Author(s)
      Sasaki Y, Asahiyama M, Tanaka T, Yamamoto S, Murakami K, Kamiya W, Matsumura Y, Osawa T, Anai M, Fruchart JC, Aburatani H, Sakai J, Kodama T.
    • Journal Title

      Sci Rep

      Volume: 10 Issue: 1 Pages: 7817-7817

    • DOI

      10.1038/s41598-020-64902-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Gene Expression Profiles Induced by a Novel Selective Peroxisome Proliferator-Activated Receptor α Modulator (SPPARMα) Pemafibrate2019

    • Author(s)
      Sasaki Y, Raza-Iqbal S, Tanaka T, Murakami K, Anai M, Osawa T, Matsumura Y, Sakai J, Kodama T
    • Journal Title

      Int J Mol Sci

      Volume: 20(22) Issue: 22 Pages: 5682-5682

    • DOI

      10.3390/ijms20225682

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phosphoethanolamine Accumulation Protects Cancer Cells under Glutamine Starvation through Downregulation of PCYT22019

    • Author(s)
      Osawa T, Shimamura T, Saito K, Hasegawa Y, Ishii N, Nishida M, Ando R, Kondo A, Anwar M, Kato K, Endo K, Yamano S, Kanki Y, Matsumura Y, Minami T, Tanaka T, Anai M, Wada Y, Wanibuchi H, Hayashi M, Hamada A, Yoshida M, Yachida S, Nakao M, Sakai J, Aburatani H, Shibuya M, Hanada K, Miyano S, Soga T, Kodama T
    • Journal Title

      Cell Rep.

      Volume: 29(1) Issue: 1 Pages: 89-103

    • DOI

      10.1016/j.celrep.2019.08.087

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regnase-1-mediated post-transcriptional regulation is essential for hematopoietic stem and progenitor cell homeostasis2019

    • Author(s)
      Kidoya H, Muramatsu F, Shimamura T, Jia W, Satoh T, Hayashi Y, Naito H, Kunisaki Y, Arai F, Seki M, Suzuki Y, Osawa T, Akira S., Takakura N.
    • Journal Title

      Nature Commun,

      Volume: 10 Issue: 1 Pages: 1072-1072

    • DOI

      10.1038/s41467-019-09028-w

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 腫瘍微小環境における免疫細胞を介した代謝適応機構2023

    • Author(s)
      大澤毅
    • Organizer
      第7回理論生物学ワークショップ
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Cancer Metabolism within tumor microenvironments2022

    • Author(s)
      Tsuyoshi Osawa
    • Organizer
      12th AACR-JCA Joint Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 腫瘍微小環境における代謝変化を抑制するオルガネラダイナミクス2022

    • Author(s)
      大澤毅
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] がんと代謝2022 (Years in Review)2022

    • Author(s)
      大澤毅
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 肝内胆管がんのゲノム多様性を凌駕しておこるBCAA代謝機構2022

    • Author(s)
      大澤毅, 北川彰洋, 三森功士
    • Organizer
      第26回日本がん分子標的治療学会学術集会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 腫瘍微小環境における特異的な代謝リプログラミング2022

    • Author(s)
      大澤毅
    • Organizer
      第22回日本抗加齢医学会総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ニュートリオミクスから迫るオルガネラダイナミクス2022

    • Author(s)
      大澤毅
    • Organizer
      iSeminar (異分野融合セミナー)
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 造血細胞、エクソソーム、多階層オミクス解析からみる全身性疾患生物学2021

    • Author(s)
      大澤毅
    • Organizer
      第94回日本生化学会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] がん微小環境におけるがん細胞と線維芽細胞の代謝相互作用2021

    • Author(s)
      大澤毅
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ニュートリオミクスから迫るがん悪性化機構の解明2021

    • Author(s)
      大澤毅
    • Organizer
      第121回北海道癌談話会春季シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ニュートリオミクス、がんと代謝2021

    • Author(s)
      大澤毅
    • Organizer
      第25回日本がん分子標的治療学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] がん微小環境におけるエピジェネティック制御2021

    • Author(s)
      大澤毅
    • Organizer
      第14回日本エピジェネティクス研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Integrative Nutriomics Approach for understanding Cancer and Metabolism2020

    • Author(s)
      Osawa T
    • Organizer
      International Conference on Cancer Systems Biology Beyond
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Integrative Nutriomics Approach for understanding Cancer and Metabolism2020

    • Author(s)
      大澤 毅
    • Organizer
      International Conference on Cancer Systems Biology Beyond
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Information and life science fusion brings innovation-To break through the limits of omics analysis2019

    • Author(s)
      大澤 毅
    • Organizer
      The 42nd Annual Meeting of the Molecular Biology Society of Japan
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Tumor progression though amino acids metabolic shift2019

    • Author(s)
      大澤 毅
    • Organizer
      The 78th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2019 Annual Research Report
  • [Presentation] Integrative understanding and control of biological phenomena through specio-temporal omics2019

    • Author(s)
      大澤 毅
    • Organizer
      The 92nd Annual Meeting of the Japanese Biochemical Society
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] がん細胞におけるグルタミン欠乏適応機構の解明2019

    • Author(s)
      大澤 毅
    • Organizer
      第7回がんと代謝研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Adaptation of Cancer cells against amino acid deprivation to promote tumor progression2019

    • Author(s)
      大澤 毅
    • Organizer
      2019 Spring International Convention of The Pharmaceutical Society of Korea
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] 疾患原因遺伝子・タンパク質の解析技術と創薬/診断技術への応用2022

    • Author(s)
      執筆者:81名、技術情報協会
    • Total Pages
      530
    • Publisher
      技術情報協会
    • ISBN
      9784861048777
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Book] Precision Medicine2019

    • Author(s)
      哺乳類胚の休眠ダイナミクス
    • Total Pages
      84
    • Publisher
      北隆館
    • Related Report
      2019 Annual Research Report
  • [Book] 医学のあゆみ2019

    • Author(s)
      多階層オミクス統合解析-オミクス解析
    • Total Pages
      120
    • Publisher
      医歯薬出版株式会社
    • Related Report
      2019 Annual Research Report
  • [Remarks] -

    • URL

      https://www.onc.rcast.u-tokyo.ac.jp/ja/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 含フッ素アミノ酸2022

    • Inventor(s)
      大澤毅ら
    • Industrial Property Rights Holder
      大澤毅ら
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 横紋筋肉腫の検出方法およびそのバイオマーカー2022

    • Inventor(s)
      大澤毅ら
    • Industrial Property Rights Holder
      大澤毅ら
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-168633
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 神経芽腫の診断に用いる新たな尿中代謝物2022

    • Inventor(s)
      大澤毅ら
    • Industrial Property Rights Holder
      大澤毅ら
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-010494
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 検体チューブ及び分注デッキ2021

    • Inventor(s)
      大澤毅ら
    • Industrial Property Rights Holder
      大澤毅ら
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-055060
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi