Sato Tamaki 佐藤たまき

… Alternative Names

SATO Tamaki 佐藤たまき

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Researcher Number	90466912
Affiliation (Current)	2025: 神奈川大学, 理学部, 教授
Affiliation (based on the past Project Information) *help	2022 – 2024: 神奈川大学, 理学部, 教授 2015 – 2021: 東京学芸大学, 教育学部, 准教授 2008 – 2010: Tokyo Gakugei University, 教育学部, 准教授
Review Section/Research Field	Principal Investigator Stratigraphy/Paleontology / Basic Section 17050:Biogeosciences-related Except Principal Investigator Medium-sized Section 21:Electrical and electronic engineering and related fields
Keywords	Principal Investigator 爬虫類 / 層序 / 白亜紀 / 古脊椎動物 / 化石 / 古生物学 / 中生代 / 脊椎動物 / 魚類 / 首長竜 … More / 分類学 / 古生物 / 中華人民共和国 / 中華民国(台湾) / カナダ / 国際情報交換 / 国際研究者交流 … More Except Principal Investigator 遊泳 / 運動制御 / 制御原理 / 首長竜 / ロコモーション / 古生物 / 運動様式復元 Less

古生物運動制御学：絶滅動物の運動様式の革新的復元方法の創成
- Principal Investigator
  
  石黒章夫
- Project Period (FY)
  2022 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 21:Electrical and electronic engineering and related fields
- Research Institution
  Tohoku University
Biostratigraphic distribution of marine vertebrates in the Japanese Upper CretaceousPrincipal Investigator
- Principal Investigator
  
  Sato Tamaki
- Project Period (FY)
  2018 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 17050:Biogeosciences-related
- Research Institution
  Kanagawa University
  Tokyo Gakugei University
Taxonomic study of the Plesiosauria and other marine reptiles of the Upper Cretaceous Yezo GroupPrincipal Investigator
- Principal Investigator
  
  SATO Tamaki
- Project Period (FY)
  2015 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Stratigraphy/Paleontology
- Research Institution
  Tokyo Gakugei University
Comparative anatomy and field survey of the Late Cretaceous plesiosaursPrincipal Investigator
- Principal Investigator
  
  SATO Tamaki
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Young Scientists (A)
- Research Field
  
  Stratigraphy/Paleontology
- Research Institution
  Tokyo Gakugei University

All 2022 2021 2020 2019 2018 2017 2015 2011 2010 2009 2008

All Journal Article Presentation

[Journal Article] Santonian-Campanian neoselachian faunas of the Upper Cretaceous Yezo Group in Nakagawa Town, Hokkaido, Japan2022
- Author(s)
  Shiori Kanno, Sayaka Tokumaru, Shuhei Nakagaki, Yasuhisa Nakajima, Akihiro Misaki, Yoshinori Hikida, Tamaki Sato
- Journal Title
  
  Cretaceous Reseach
  
  Volume: 133 Pages: 105139-105139
- DOI
  10.1016/j.cretres.2022.105139
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18K03822
[Journal Article] Estimation of the Age of Nodules Containing Macrofossills Using Radiolaria2021
- Author(s)
  SASAGUCHI Shin, HIRAYAMA Ren and SATO Tamaki
- Journal Title
  
  Bulletin of Tokyo Gakugei University, Division of Natural Sciences
  
  Volume: 73 Pages: 89-101
- NAID
  120007184536
- Open Access
- Data Source
  KAKENHI-PROJECT-18K03822
[Journal Article] 北海道むかわ町穂別から産出した上部白亜系海棲爬虫類標本の層序分布の分析2020
- Author(s)
  関口修司・佐藤たまき
- Journal Title
  
  むかわ町穂別博物館研究報告
  
  Volume: 35 Pages: 11-17
- Open Access
- Data Source
  KAKENHI-PROJECT-18K03822
[Journal Article] A New Hadrosaurine (Dinosauria: Hadrosauridae) from the Marine Deposits of the Late Cretaceous Hakobuchi Formation, Yezo Group, Japan2019
- Author(s)
  Kobayashi Yoshitsugu、Nishimura Tomohiro、Takasaki Ryuji、Chiba Kentaro、Fiorillo Anthony R.、Tanaka Kohei、Chinzorig Tsogtbaatar、Sato Tamaki、Sakurai Kazuhiko
- Journal Title
  
  Scientific Reports
  
  Volume: 9 Issue: 1 Pages: 1-14
- DOI
  10.1038/s41598-019-48607-1
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03822, KAKENHI-PROJECT-19K04052
[Journal Article] 香川県さぬき市に分布する和泉層群引田累層（カンパニアン）から産出した爬虫類・板鰓類化石。2018
- Author(s)
  原　巧輔・金澤芳廣・林　昭次・佐藤たまき
- Journal Title
  
  大阪市立自然史博物館研究報告
  
  Volume: 72 Pages: 61-79
- NAID
  120006425246
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-15K05327
[Journal Article] A Turonian polycotylid plesiosaur (Reptilia; Sauropterygia) from Obira Town, Hokkaido, and its biostratigraphic and paleoecological significance.2018
- Author(s)
  Tamaki Sato, Tomoya Hanai, Shoji Hayashi, and Tomohiro Nishimura
- Journal Title
  
  Paleontological Research
  
  Volume: in press Issue: 3 Pages: 265-278
- DOI
  10.2517/2017pr024
- NAID
  40021581253
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K05327
[Journal Article] A basal mosasauroid from the Campanian (Upper Cretaceous) of Hokkaido, northern Japan.2018
- Author(s)
  Tamaki Sato, Takuya Konishi, Tomohiro Nishimura, and Takeru Yoshimura
- Journal Title
  
  Paleontological Research
  
  Volume: in press Issue: 2 Pages: 156-166
- DOI
  10.2517/2017pr018
- NAID
  40021511228
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327
[Journal Article] Sphenodus (Chondrichthyes, Neoselachii) from the Upper Cretaceous in Nakagawa Town, Hokkaido, Japan2017
- Author(s)
  Shiori Kanno, Yasuhisa Nakajima, Yoshinori Hikida and Tamaki Sato
- Journal Title
  
  Paleontological Research
  
  Volume: 21 Issue: 2 Pages: 122-130
- DOI
  10.2517/2016pr009
- NAID
  40021154084
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327, KAKENHI-PROJECT-15J06594
[Journal Article] New information on Wumengosaurus delicatomandibularis Jiang et al., 2008 (Diapsida: Sauropterygia), with a revision of the osteology and phylogeny of the taxon.2011
- Author(s)
  Wu, X.-c., Y.-n.Cheng, C., Li, L-j.Zhao, T.Sato
- Journal Title
  
  Journal of Vertebrate Paleontology 31
  
  Pages: 70-83
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] New Information on Wumengosaurus delicatomandibularis Jiang et al., 2008 (Diapsida : Sauropterygia), with a Revision of the Osteology and Phylogeny of the Taxon2011
- Author(s)
  Xiao-Chun Wu, Yen-Nien Cheng, Chun Li, Li-Jun Zhao, Tamaki Sato
- Journal Title
  
  Journal of Vertebrate Paleontology
  
  Volume: 31 Pages: 70-83
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] Braincase of a polycotylid plesiosaur (Reptilia : Sauropterygia) from the Upper Cretaceous of Manitoba, Canada2011
- Author(s)
  Tamaki Sato, Xiao-chun Wu, Alex Tirabasso, Paul Bloski
- Journal Title
  
  Journal of Vertebrate Paleontology
  
  Volume: 31 Pages: 313-329
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] Braincase of a polycotylid plesiosaur (Reptilia: Sauropterygia) from the Upper Cretaceous of Manitoba, Canada.2011
- Author(s)
  Sato, T., X.-c.Wu, A.Tirabasso, P.Bloski
- Journal Title
  
  Journal of Vertebrate Paleontology 31
  
  Pages: 313-329
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] Osteology of Yunguisaurus Cheng et al., 2006 (Reptilia; Sauropterygia), a Triassic pistosauroid from China.2010
- Author(s)
  Sato, T., Y.-n.Cheng, X.-c.Wu, C.Li
- Journal Title
  
  Paleontological Research 14(3)
  
  Pages: 179-195
- NAID
  10026670300
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] A remarkable case of a shark-bitten elasmosaurid plesiosaur.2010
- Author(s)
  Shimada, K., T.Tsuihiji, T.Sato, Y.Hasegawa
- Journal Title
  
  Journal of Vertebrate Paleontology 30(2)
  
  Pages: 592-597
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] Osteology of Yunguisaurus (Reptilia ; Sauropterygia), a Triassic Pistosauroid from China2010
- Author(s)
  Tamaki Sato, Yen-Nien Cheng, Xiao-Chun Wu, Chun Li
- Journal Title
  
  Paleontological Research
  
  Volume: 14 Pages: 179-195
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] A new skeleton of Miodentosaurus brevis (Diapsida, Thalattosauria) with a further study of the taxon.2010
- Author(s)
  Zhao, L.-j., T.Sato, J.Li, C.Li, X.-c.Wu
- Journal Title
  
  Vertebrata PalAsiatica 48(1)
  
  Pages: 1-10
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] Osteology of Yunguisaurus Cheng et al, 2006(Reptilia ; Sauropterygia), a Triassic pistosauroid from China2010
- Author(s)
  Sato, T., 他3名
- Journal Title
  
  Paleontological Research 14(印刷中)
- NAID
  10026670300
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20684023
[Journal Article] The Most Complete Pistosauroid Skeleton from the Triassic of Yunnan, China2008
- Author(s)
  Zhao, L.-j., T. Sato, and C. Li
- Journal Title
  
  Acta Geologica Sinica 82
  
  Pages: 283-286
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Pliosaurid (Reptilia: Sauropterygia) remains from the Upper Cretaceous of Japan2022
- Author(s)
  Tamaki Sato, Hiroki Echizenya, Tatsuya Shinmura, Yoshinori Hikida, Yuji Soeda
- Organizer
  The 6th International Palaeontological Congress
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03822
[Presentation] 北海道上部白亜系蝦夷層群のプリオサウルス類首長竜2021
- Author(s)
  佐藤たまき・疋田吉識・新村龍也・越前谷宏紀・添田雄二
- Organizer
  日本古生物学会第170 回例会
- Data Source
  KAKENHI-PROJECT-18K03822
[Presentation] 北海道中川町上部白亜系から産出したツノザメ類Protosqualus2021
- Author(s)
  菅野詩織・中島保寿・御前明洋・疋田吉識・徳丸さやか・中垣周平・佐藤たまき
- Organizer
  日本古生物学会第170 回例会
- Data Source
  KAKENHI-PROJECT-18K03822
[Presentation] Marine vertebrates of Japanese Upper Cretaceous: a review2019
- Author(s)
  Tamaki Sato
- Organizer
  1st Asian Palaeontological Congress (APC 2019)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K03822
[Presentation] 陸には恐竜、海には？：中生代の海生爬虫類2019
- Author(s)
  佐藤たまき
- Organizer
  第34回国際生物学賞記念シンポジウム
- Invited
- Data Source
  KAKENHI-PROJECT-18K03822
[Presentation] 恐竜時代の海2018
- Author(s)
  佐藤たまき
- Organizer
  日本化学会第98春季年会市民公開講座「太古から未来へ～超えるかがく」
- Invited
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 北海道小平町から産出した基盤的なモササウルス類2018
- Author(s)
  佐藤たまき、小西卓哉、西村智弘、吉村健
- Organizer
  日本古生物学会第 167 回例会
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 北海道小平町の上部白亜系蝦夷層群から産出したウミガメ類（カメ目：ウミガメ上科）化石2017
- Author(s)
  吉田将崇・平山廉・吉村健・佐藤たまき・西村智弘
- Organizer
  日本古生物学会第166回例会
- Place of Presentation
  早稲田大学（東京都・新宿区）
- Year and Date
  2017-01-27
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 香川県さぬき市多和兼割の上部白亜系和泉層群から産出した脊椎動物化石2017
- Author(s)
  原巧輔、金澤芳廣、林昭次、佐藤たまき
- Organizer
  日本古生物学会2017年年会
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 絶滅した生物"首長竜"2017
- Author(s)
  佐藤たまき
- Organizer
  日本生物教育学会第101回全国大会
- Place of Presentation
  東京学芸大学（東京都・小金井市）
- Year and Date
  2017-01-07
- Invited
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] A Turonian polycotylid plesiosaur (Reptilia; Sauropterygia) from Hokkaido, Japan, and its biostratigraphic and histological significance.2017
- Author(s)
  Tamaki Sato, Tomoya Hanai, Shoji Hayashi, Tomohiro Nishimura
- Organizer
  Society of Vertebrate Paleontology 76th Annual Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 化石の出る幕～古生物学と教育の出会い2017
- Author(s)
  佐藤たまき
- Organizer
  東京学芸大学大学院連合学校教育学研究科2017年度（第一回）広域科学教育学会大会研究発表会
- Invited
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] 北海道中川町産出上部白亜系産出のサメ化石 Echinorhinus priscus と Cretodus borodini2017
- Author(s)
  徳丸沙耶夏、中島保寿、疋田吉識、佐藤たまき
- Organizer
  日本古生物学会2017年年会
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] Ontogeny of Yunguisaurus (Sauropterygia; Pistosauroidea)2015
- Author(s)
  Sato, T., Zhao, L.-j., Li, C., Xu, L., and Wu, X.-c.
- Organizer
  75th Anniversary meeting of the Society of Vertebrate Paleontology
- Place of Presentation
  Hyatt Regency Dallas （アメリカ合衆国テキサス州ダラス市）
- Year and Date
  2015-10-14
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] The evolution of plesiosaur bone histology: new evidence from new finds2015
- Author(s)
  Sander, P. M., Hayashi, S., Houssaye, A., Nakajima, Y., Sato, T., and Wintrich, T.
- Organizer
  3rd International Symposium of Paleohistology
- Place of Presentation
  University of Bonn（ドイツ国ボン市）
- Year and Date
  2015-07-02
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] The evolution of plesiosaur bone histology: evidence from long bones and vertebrae.2015
- Author(s)
  Sander, P. M., Hayashi, S., Houssaye, A., Nakajima, Y., Sato, T., and Wintrich, T.
- Organizer
  75th Anniversary meeting of the Society of Vertebrate Paleontology
- Place of Presentation
  Hyatt Regency Dallas （アメリカ合衆国テキサス州ダラス市）
- Year and Date
  2015-10-14
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K05327
[Presentation] Late Cretaceous plesiosaurian fauna of Manitoba Escarpment, Canada.2010
- Author(s)
  Sato, T., X.-c.Wu
- Organizer
  International Symposium on Triassic and later Marine Vertebrate Faunas
- Place of Presentation
  北京(中国)
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Braincase of a polycotylid plesiosaur (Reptilia : Sauropterygia) from the Upper Cretaceous of Manitoba, Canada2010
- Author(s)
  Tamaki Sato, Xiao-chun Wu, Alex Tirabasso, Paul Bloski
- Organizer
  Society of Vertebrate Paleontology
- Place of Presentation
  David L.Lawrence Convention Center(アメリカ)
- Year and Date
  2010-10-17
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Braincase of a polycotylid plesiosaur (Reptilia: Sauropterygia) from the Upper Cretaceous of Manitoba, Canada.2010
- Author(s)
  Sato, T., X.-c.Wu
- Organizer
  Society of Vertebrate Paleontology 70thAnnual Meeting.
- Place of Presentation
  ピッツバーグ(アメリカ合衆国)
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] A new skeleton of Miodentosaurus brevis(Diapsida : Thalattosauria)2009
- Author(s)
  Sato, T., 他3名
- Organizer
  9^<th> North American Paleontological Convention
- Place of Presentation
  University of Cincinnati(アメリカ・オハイオ州)
- Year and Date
  2009-06-26
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Review of Cretaceous marine reptiles of Japan2009
- Author(s)
  Sato, T.
- Organizer
  4^<th> International Symposium of the IGCP 507
- Place of Presentation
  熊本大学
- Year and Date
  2009-12-04
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Review of Cretaceous marine reptiles of Japan.4^<th> International Symposium of the IGCP 5072009
- Author(s)
  Sato, T.
- Organizer
  Paleoclimates of the Cretaceous in Asia and their global correlation
- Place of Presentation
  熊本
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] A new skeleton of Miodentosaurus brevis (Diapsida: Thalattosauria).2009
- Author(s)
  Sato, T., L.-j.Zhao, J.Liu, C.Li
- Organizer
  9^<th> North American Paleontological Convention
- Place of Presentation
  シンシナティ(アメリカ合衆国)
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Osteology of Yunguisaurus (Sauropterygia, Pistosauroidea)2008
- Author(s)
  Sato, T., 他3名
- Organizer
  68^<th> Meeting of Society of Vertebrate Paleontology
- Place of Presentation
  Renaissance Cleveland Hote1(アメリカ・オハイオ州)
- Year and Date
  2008-10-18
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Diversity of plesiosaurs.2008
- Author(s)
  Sato, T.
- Organizer
  5^<th> Conference of Secondary Adaptation of Tetrapods to Life in Water.
- Place of Presentation
  東京
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Osteology and phylogeny of Miodentosaurus (Diapsida: Thalattosauria).2008
- Author(s)
  Sato, T., X.-c.Wu
- Organizer
  Canadian Paleontology Conference 2008
- Place of Presentation
  ウィニペグ(カナダ国)
- Data Source
  KAKENHI-PROJECT-20684023
[Presentation] Osteology and Phylogeny of Miodentosaurus (Diapsida : Thalattosauria)2008
- Author(s)
  Sato, T., 他3名
- Organizer
  Canadian Paleontological Conference 2008
- Place of Presentation
  The Manitoba Museum (カナダ・マニトバ州)
- Year and Date
  2008-09-20
- Data Source
  KAKENHI-PROJECT-20684023

1. 石黒章夫 (90232280)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
2. 福原洸 (10827611)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
3. 鈴木朱羅 (80968222)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
4. 加納剛史 (80513069)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

Sato Tamaki 佐藤 たまき

SATO Tamaki 佐藤 たまき

Research Projects

Research Products

Co-Researchers

古生物運動制御学：絶滅動物の運動様式の革新的復元方法の創成

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Biostratigraphic distribution of marine vertebrates in the Japanese Upper CretaceousPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Taxonomic study of the Plesiosauria and other marine reptiles of the Upper Cretaceous Yezo GroupPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Comparative anatomy and field survey of the Late Cretaceous plesiosaursPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Santonian-Campanian neoselachian faunas of the Upper Cretaceous Yezo Group in Nakagawa Town, Hokkaido, Japan2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Estimation of the Age of Nodules Containing Macrofossills Using Radiolaria2021

Author(s)

Journal Title

NAID

Data Source

[Journal Article] 北海道むかわ町穂別から産出した上部白亜系海棲爬虫類標本の 層序分布の分析2020

Author(s)

Journal Title

Data Source

[Journal Article] A New Hadrosaurine (Dinosauria: Hadrosauridae) from the Marine Deposits of the Late Cretaceous Hakobuchi Formation, Yezo Group, Japan2019

Author(s)

Journal Title

DOI

Data Source

[Journal Article] 香川県さぬき市に分布する和泉層群引田累層（カンパニアン）から産出した爬虫類・板鰓類化石。2018

Author(s)

Journal Title

NAID

Data Source

[Journal Article] A Turonian polycotylid plesiosaur (Reptilia; Sauropterygia) from Obira Town, Hokkaido, and its biostratigraphic and paleoecological significance.2018

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] A basal mosasauroid from the Campanian (Upper Cretaceous) of Hokkaido, northern Japan.2018

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] Sphenodus (Chondrichthyes, Neoselachii) from the Upper Cretaceous in Nakagawa Town, Hokkaido, Japan2017

Author(s)

Journal Title

DOI

NAID

Data Source

[Journal Article] New information on Wumengosaurus delicatomandibularis Jiang et al., 2008 (Diapsida: Sauropterygia), with a revision of the osteology and phylogeny of the taxon.2011

Author(s)

Journal Title

Data Source

[Journal Article] New Information on Wumengosaurus delicatomandibularis Jiang et al., 2008 (Diapsida : Sauropterygia), with a Revision of the Osteology and Phylogeny of the Taxon2011

Author(s)

Journal Title

Data Source

[Journal Article] Braincase of a polycotylid plesiosaur (Reptilia : Sauropterygia) from the Upper Cretaceous of Manitoba, Canada2011

Sato Tamaki 佐藤たまき

SATO Tamaki 佐藤たまき

[Journal Article] 北海道むかわ町穂別から産出した上部白亜系海棲爬虫類標本の層序分布の分析2020