長谷川健のプロフィール
研究業績
＜公表論文（査読あり）＞
（１）Kamiyama, H., Yamamoto, A.,
Hasegawa, T., Kajiwara, T., Mogi, T. (2005) Gravity and density variations of the
tilted Tottabetsu plutonic complex, Hokkaido, northern Japan: implications
for subsurface intrusive structure and pluton development, Earth Planets
and Space, 57, 21-24.
（２）
長谷川健・中川光弘（2007）北海道東部，阿寒カルデラ周辺の前-中期更新世火砕堆積物の層序，地質学雑誌，113，53-72.
（３）石井英一・安江健一・大平寛人・古澤 明・
長谷川健・中川光弘（2008）北海道北部，大曲断層近傍の背斜成長の開始時期，地質学雑誌，114，286-299．
（４）
長谷川健・石井英一・中川光弘 （2008）北海道東部阿寒火砕堆積物中に挟在する複数の広域火山灰層と北海道中央部に 分布する大規模火砕流堆積物との対比，地質学雑誌，114，366-381.
（５）岸本博志・
長谷川健・中川光弘・和田恵冶（2009）最近約1万2千年間の摩周火山のテフラ層序と噴火様式，火山，54，15-36．
（６）
Hasegawa, T., Yamamoto, A., Kamiyama, H., Nakagawa, M. (2009) Gravity structure of
Akan composite caldera, eastern Hokkaido, Japan: Application of lake water
corrections, Earth Planets and Space, 61, 933-938.
（７）
長谷川健・岸本博志・中川光弘・伊藤順一・山元孝広（2009）北海道東部，根釧原野および斜里平野における約3万5千～1万2千年前のテフラ層序と後屈斜路カルデラ火山の噴火史，地質学雑誌，115，369-390．
（８）山元孝広・伊藤順一・中川光弘・
長谷川健・岸本博志（2010）北海道東部，屈斜路・摩周カルデラ噴出物の放射炭素年代値，地質調査研究報告，61，161-170．
（９）
長谷川健・藤縄明彦・伊藤太久（2011）磐梯・吾妻・安達太良：活火山ランクBの三火山．地質学雑誌，117，補遺，33-48．
（１０）
Hasegawa, T., Nakagawa, M., Yoshimoto, M., Ishizuka, Y., Hirose, W., Seki, S., Ponomareva,
V., Alexander, R. (2011) Tephrostratigraphy and petrological study of Chikurachki
and Fuss volcanoes, western Paramushir Island, northern Kurile Islands:
Evaluation of Holocene eruptive activity and temporal change of magma system.
Quaternary International, 246, 278-297.
（１１）
長谷川健・中川光弘・伊藤順一・山元孝広（2011）北海道東部，釧路地域に分布する第四系の年代：高分解能テフラ層序に基づく対比と編年，地質学雑誌，117，686-699．
（１２）
Hasegawa, T., Nakagawa, M., Kishimoto, H. (2012) The eruption history and silicic magma systems of caldera-forming eruptions in eastern Hokkaido, Japan. Journal of Mineralogical and Petrological Sciences, 107, 39-43.
（１３）重野聖之・七山 太・須藤雄介・嵯峨山積・
長谷川健・安藤寿男（2013）北海道東部厚岸沿岸低地の完新世バリアーシステムと海水準変動の復元，地質学雑誌，119，171-189．
（１４）
Hasegawa, T., Nakagawa, M., Kishimoto, H. (2013) Calderas and Active Volcanoes in
Central to Eastern Hokkaido, Bull. Volcanol. Soc. Jpn., 58, 392i-
（１５）
長谷川健・宮村淳一・伏谷祐二・高橋裕二（2013）樽前山Ｂ噴気孔群で見られた高温ガス噴出現象，地質学雑誌，119．
（１６）
長谷川健・花岡正光・古川竜太・重野聖之・七山 太・中川光弘・安藤寿男（2013）北海道東部，釧路地域における樽前d降下火砕堆積物の発見とその意義，地質学雑誌，119，446-456．
（１７）中谷咲子・
長谷川健・藤縄明彦・照井肇子（2013）東北日本，仙岩地熱地域南部，高倉火山の山体形成史とマグマ供給系，地質学雑誌，119，457-473．
（１８）Yokoyama, M., Fujimura, K., Ishikawa, S., Kimura, M.,
Hasegawa, T., Kawasaki, I., Tenya, K., Kono Y., Sakakibara, T. (2014) Possible Evolution
of Antiferromagnetism in Zn-Doped Heavy-Fermion Superconductor CeCoIn5,
J. Phys. Soc. Jpn. 83, 033706 (5 Pages).
（１９）藤原健一郎・
長谷川健・藤縄明彦（2014）安達太良火山，12万年前噴火における噴火推移の復元：火口近傍露頭と山麓火砕流との対比による推察，火山，59．229-239.
（２０）
長谷川健・中川光弘（2014）岩石学的特徴を利用した対比・同定の有効性：北海道東部,阿寒・屈斜路火山における大規模火砕流堆積物の露頭情報，火山，59．269-274.
（２１）
長谷川健・下司信夫・石川敦代（2015）第５回陥没カルデラワークショップ報告，火山，60．251-256．
（２２）
Hasegawa, T., Nakagawa, M. (2016) Large scale explosive eruptions of Akan volcano, eastern Hokkaido, Japan: A geological and petrological case study for establishing tephro-stratigraphy and -chronology around a caldera cluster, Quaternary International, 398, 39-51. DOI: 10.1016/j.quaint.2015.07.058 .
（２３）
長谷川健・猪狩俊哉・大平達雄・田切美智雄・向井正幸・和田恵治（2016）茨城県日立市，宮脇A・泉前遺跡から出土した黒曜石製石器の産地推定，考古学と自然科学，70，13-20．
（２４）Otaka, R., Yokoyama, M., Mashiko, H.,
Hasegawa, T., Shimizu, Y., Ikeda, Y., Tenya, K., Nakamura, S., Ueta, D., Yoshizawa,
H., Sakakibara, T. (2016) Superconductivity and Non-Fermi-Liquid Behavior
in the Heavy-Fermion Compound CeCo1-xNixIn5. Journal of the Physical Society
of Japan, 85, 094713 (8 Pages).
（２５）
Hasegawa, T., Matsumoto, A., Nakagawa, M. (2016) Evolution of the 120 ka caldera-forming
eruption of Kutcharo volcano, eastern Hokkaido, Japan: Geologic and petrologic
evidence for multiple vent systems and rapid generation of pyroclastic
flow. Journal of Volcanology and Geothermal Research, 321, 58-72. DOI:
10.1016/j.jvolgeores.2016.04.030
（２６）
長谷川健・中川光弘・宮城磯治（2017）北海道東部，アトサヌプリ火山における水蒸気噴火の発生履歴：炭素年代および気象庁ボーリングコアからの検討，地質学雑誌，123，269-281．
（２７）橋本武志・
長谷川健・小園誠史・萬年一剛・中道治久・隅田まり 鈴木由希・田島靖久・高木朗充・田中 良・上澤真平・山田大志（2017）IAVCEI （国際火山学地球内部化学協会）2017年大会参加報告，火山，62，189-196
（２８）
Hasegawa, T., Mochizuki, M., Oiwane, H. (2018) Methods of Estimating the Durations of Super Large Eruptions Based on Pyroclastic Deposits. JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI, 127, 273-288.
（２９）
Hasegawa, T., Matsumoto, A., Tomiya A., Nakagawa, M. (2018) Large-scale Caldera-forming
Eruption and Active Post-caldera Volcano: General Geology and Representative
Outcrops of Toya Caldera and Usu Volcano, Southwestern Hokkaido, Japan.
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI, 127, 289-301.
（３０）Aka, F.T.,
Hasegawa, T., Nche, L.A., Asaah, A.N.E., Mimba, M.E., Teitchou, I., Ngwa, C., Miyabuchi, Y., Kobayashi, T., Kankeu, B., Yokoyama, T., Tanyileke, G., Ohba, T., Hell, J.V., Kusakabe, M. (2018) Upper Triassic mafic dykes of Lake Nyos, Cameroon (West Africa) I: K-Ar age evidence within the context of Cameroon Line magmatism, and the tectonic significance, Journal of African Earth Sciences, 141, (2018) 49-59.
（３１）Matsumoto, A.,
Hasegawa, T., Nakagawa, M. (2018) Petrology of the 120 ka Caldera-Forming Eruption
of Kutcharo Volcano, Eastern Hokkaido, Japan: Coexistence of Multiple Silicic
Magmas and their Relationship with Mafic Magmas, Journal of Petrology,
59, 771–793.
（３２）
Hasegawa, T., Aka, F.T., Miyabuchi, Y., Nche, L.A., Kobayashi, T., Kaneko, K. Asaah,
A.N.E., Boniface, K., Issa, Ohba, T., Kusakabe, M., Hell, J.V. (2019) Eruption
history and petrogenesis of rocks from Nyos volcano (NW Cameroon): Evidence
from lithostratigraphy and geochemistry. Journal of Volcanology and Geothermal
Research, 378, 51-71.
（３３）Asaah, A.N.E., Yokoyama, T., Aka, F.T., Iwamori, H., Kuritani, T.,
Usui, T., Gountie Dedzoi, M., Tamen, J.,
Hasegawa, T., Fozing, E.M., Wirmvem, M.J., Nche, L.A. (2020) Major/trace elements
and Sr–Nd–Pb isotope systematics of lavas from lakes Barombi Mbo and Barombi
Koto in the Kumba graben, Cameroon volcanic line: Constraints on petrogenesis,
Journal of African Earth Sciences, 161
（３４）菊地瑛彦・
長谷川健（2020）栃木県北部，余笹川岩屑なだれ堆積物の層序・年代と運搬過程，地質学雑誌, 126, 293-310.
（３５）Pitcher, B.W., Gualda, G.A.R.,
Hasegawa, T. (2021) Repetitive duality of rhyolite compositions, timescales, and storage
and extraction conditions for Pleistocene caldera-forming eruptions, Hokkaido,
Japan, Journal of Petrology, 62, 1-30.
（３６）Nche, L.A,
Hasegawa, T., Aka, F.T., Kobayashi, T., Nemeth, K., Asaah, A.N.E., Kaneda, Y., Nishihara,
A., Etakah, B-T.E, Lebga, A.K., Tiabou, A.F., Ngwa, C.N., Suh, C.E. (2021)
Lithostratigraphy and geochemistry of Aojiki volcano and Sumiyoshiike and
Yonemaru maars, Kamo Volcanic Field (Southern Kyushu), Japan, Journal of
Volcanolgy and Geothermal Research, 412, 107170.
（３７）吉川昌伸・鈴木三男・佐藤雅俊・小林和貴・
長谷川健・吉川純子・戸田博史（2021）ヤチカンバ花粉の識別と北海道東部の西別湿原における6500年前以降の植生史，植生史研究 , 29, 37-52.
（３８）
長谷川健・柴田翔平・小林哲夫・望月伸竜・中川光弘・岸本博志（2021）北海道東部，摩周火山の7.6 kaカルデラ形成噴火過程：地質学・岩石学・古地磁気学的手法による高分解能推移復元とLow
aspect ratio ignimbrite（LARI）の認定，火山，66，187-210．
（３９）Mochizuki, N., Fujii, S.,
Hasegawa, T., Yamamoto, Y., Hatakeyama, T., Yamashita, D., Okada, M., Shibuya, H.
(2021) A tephra-based approach to calibrating relative geomagnetic paleointensity
stacks to absolute values, EPSL, 572, 117119.
（４０）Asaah, A.N.E., Yokoyama, T., Iwamori, H., Aka, F.T., Kuritani, T.,
Usui, T., Tamen, J., Gountié Dedzo, M., Chako-Tchamabé, B.,
Hasegawa, T., Nche, L.A., Ohba, T. (2021) High–μ signature in lavas of Mt. Oku: Implications
for lithospheric and asthenospheric contributions to the magmatism of the
Cameroon Volcanic Line (West Africa), Lithos, 400–401, 106416.
（４１）Plunkett, G., Sigl, M., Schwaiger, H.F., Tomlinson, E., Toohey, M.,
McConnell, J.R., Pilcher, J.R.,
Hasegawa, T., Siebe, C. (2022) No evidence for tephra in Greenland from the historic
eruption of Vesuvius in 79 CE: Implications for geochronology and paleoclimatology,
Climate of the Past.
（４２）金田泰明・
長谷川健（2022）北海道南西部，濁川火山におけるカルデラ形成期～後カルデラ期の噴出物層序及び噴火推移，火山，火山, 67, 1-19
（４３）Schmidt,C., Laag, C., Whitehead, M., Profe, J., Aka, F.,
Hasegawa, T., Kereszturi, G. (2022) The complexities of assessing volcanic hazards
along the Cameroon Volcanic Line using spatial distribution of monogenetic
volcanoes, Journal of Volcanology and Geothermal Research, 427, 107558.
（４４）柴田翔平・
長谷川健（2022）北海道東部，屈斜路火山40 kaカルデラ形成噴火（Kp I）の推移：大規模水蒸気プリニー式噴火の発生機構，火山, 67, 149-169
（４５）
Hasegawa, T., Nakagawa, M. Kamiyama, H., Yamamoto, A. (2022) Geological, geophysical and geochemical constraints on the time-space evolution
of Akan composite caldera, Hokkaido, Japan. Frontiers in Earth Sciences,
DOI: 10.3389/feart.2022.953152
（４６）
Hasegawa, T., Greve, A., Gravley, D.M., Kusu, C., Kaneda, Y., Shibata, S., Okada, M.,
Kósik, S., Mochizuki, M., Turner, G. (2023) Paleomagnetic constraint of
the age and duration of the Taupō Eruption, New Zealand. Earth, Planets
and Space, 75:23
（４７）西野佑紀・
長谷川健・伊藤久敏・菊地瑛彦・大井信三（2023）栃木県北部，塩原カルデラ噴出物の編年とマグマ変遷．地質学雑誌，129, 61-73.
（４８）渡部将太・
長谷川健・小畑直也・豊田 新・今山武志（2023）福島県南部，二岐山火山の噴火史とマグマ供給系．地質学雑誌，129，307-324 ．
（４９） Wakana, I., Kadono, Y., Urabe, J., Tamura, Y., Suzuki, Y., Yamada,
H., Oyama, Y., Wada, K.,
Hasegawa, T., Ohara, M. (2023) Varying Ecological Successions in Lakes Subdivided by
Volcanic Eruption at Akan Caldera, Japan. Hydrobiologia, 850, 1-15
（５０）
長谷川健・松本恵子・橋本武志・畑 真紀・岩橋くるみ・無盡真弓・村松 弾, ・大橋正俊・三反畑修・嶋野岳人・田中 良・安田裕紀（2023）IAVCEI（国際火山学地球内部化学協会）2023年大会参加報告（その１）：セッションとワークショップの概況，火山,
68, 105-113.
（５１）松本恵子・コンウェイ クリス・畑 真紀・伊藤久敏・岩橋くるみ・片岡香子・森田雅明・西原 歩・三反畑修・渡部将太・山﨑誠子・長谷川健（2023）IAVCEI（国際火山学地球内部化学協会）2023年大会参加報告（その２）：巡 検と学会参加の感想 ，火山, 68, 115-123.
（５２）Kósik, S.,
Hasegawa, T., Danišík, M., Németh, K., Okada, M., Friedrichs, B., Schmitt, A.K. (2023)
Multi-method constraints on the age and timescale of silicic small-volume
eruptions of Puketerata Volcanic Complex, Taupō Volcanic Zone, New Zealand,
Earth, Planets and Space, 75: 107.
（５３）
長谷川健・菊池文太・柴田翔平・井村 匠・伴 雅雄・常松佳恵・山本裕二・大場 司・鈴木和馬・戸丸淳晴・楠 稚枝・岡田 誠（2023）福島県，吾妻―浄土平火山の1893年明治噴火はマグマ放出を伴っていた：燕沢火口列周辺に分布する巨大な火山弾の古地磁気年代測定による推察，火山，68.
189-196.
（５４）
Hasegawa, T., Kikuchi, B., Shibata, S., Yamamoto, Y., Imura, T., Ban, M., Tsunematsu,
K., Kusu, C., Okada, M., Ohba, T., (2023) Paleomagnetism and paleomagnetic dating to
large volcanic bombs: An example from the historical eruption of Azuma-Jododaira
volcano, NE Japan, Earth, Planets and Space, 75: 172.
（５５）金田泰明・長谷川健,・井村 匠（2023）北海道南西部，濁川火山カルデラ噴火の軽石礫に認められる高Ba異常とその成因：岩石組織および化学組成からの検討．地質学雑誌
129, 615-631．
＜投稿中＞
Evolution of a large-scale phreatoplinian eruption: Constraints from 40
ka caldera-forming eruption of Kutcharo volcano, eastern Hokkaido, Japan.
JVGR
=> 査読1回目終了（大修正後掲載可）
A new method of oriented drill coring and tephra cubing, its application
to the paleomagnetic analysis of Akan caldera-forming eruption deposits
(eastern Hokkaido, Japan), and identification of the Matuyama-Brunhes geomagnetic
reversal in sequential tephra and loess layers, EPS special issue
＜投稿準備（執筆）中＞
Upper Triassic mafic dykes of Lake Nyos, Cameroon (West Africa) II, Chemical
Geology
Evaluation on the Durations of Large-scale caldera-forming Eruptions Based
on Paleomagnetic Method 1: Examples from Shikotsui Ignimbrite, Hokkaido,
Japan, EPS special issue
Evaluation on the Durations of Large-scale caldera-forming Eruptions Based
on Paleomagnetic Method 2: Examples from Mamaku/Ohakuri Ignimbrites, New
Zealandn, EPS special issue
Evaluation on the Durations of Large-scale caldera-forming Eruptions Based
on Paleomagnetic Method 3: Examples from Aira cladera-forming eruptions,
Kyushu, Japan, EPS special issue
ResearchGate
＜著書＞
（１）
長谷川健・中川光弘（2010）第8章4節2項「阿寒カルデラ」．日本地質学会編『日本地方地質誌 北海道地方』，朝倉書店．
（２）宝田晋治・
長谷川健・和田恵治（2010）第8章4節3項「屈斜路火山とアトサヌプリ・摩周火山」．日本地質学会編『日本地方地質誌 北海道地方』，朝倉書店．
（３）
長谷川健（2012）「能取岬の地質学」．Arctic Circle, 83, 14-17．財団法人北方文化振興協会．ISSN 0917-9003．
（４）
Takeshi Hasegawa (2012) Catastrophic volcanic events in the early Holocene: successive large-scale
caldera-forming eruptions in Japan. Holocene: Perspectives, Environmental
Dynamics and Impact Events, Nova Science Publishers.
（５）中川光弘・
長谷川健・松本亜希子（2014）北海道東部，阿寒～屈斜路火山群の成り立ち─小型カルデラが複合した大型カルデラの形成，特集「日本をおそった巨大噴火」，雑誌『科学』１月号，岩波書店．
（６）
長谷川健・和田恵治・尾山洋一・占部城太郎・若菜 勇・田村由紀・山田浩之・佐藤 謙・坂本洋典・照井滋晴・本田優子（2016）フィールド活用ハンドブック「阿寒の自然と文化－阿寒の魅力再発見 自然史の最新研究を学ぶ―」，釧路市教育委員会．
（７）
長谷川健（2017）第I部 第１章「阿寒火山におけるカルデラの成り立ち」，釧路叢書，The Great Nature of Akan 阿寒の大自然誌，釧路市教育委員会．
（８）廣瀬 亘・川上源太郎・
長谷川健・林 圭一・渡辺真人（2018）５万分の一地質図幅および説明書「網走」，地質調査所．
（９）中川光弘・
長谷川健・松本亜希子（2023）北海道東部，阿寒～屈斜路火山群の成り立ち─小型カルデラが複合した大型カルデラの形成，「富士山噴火に備える」,『科学』編集部 編，岩波書店．
＜国際会議講演＞
（１）Hasegawa, T., Nakagawa, M. (2002) Preliminary Geologic and Petrologic Study of the Caldera-Forming Eruption Related to Akan Caldera, East Hokkaido, Japan. 3rd Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs (JKASP). Fairbanks, July 2002.
（２）Kamiyama, H., Yamamoto, A., Hasegawa, T., Kajiwara, T., Mogi, T. (2005) Development of a cylindrical pluton: combined field and gravity evidence from the tilted Miocene Tottabetsu plutonic complex, Hokkaido, Japan. American Geophysical Union (AGU) Fall meeting, San Francisco, December 2005.
（３）Hasegawa, T., Kamiyama, H., Nakagawa, M., Yamamoto, A. (2006) Incremental evolution of the Akan Caldera, east Hokkaido, Japan. 5th Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs (JKASP), Sapporo, June 2006.
（４）Hasegawa, T., Nakagawa, M., Kamiyama, H., Yamamoto, A. (2006) Origin of Rectangular Shape of Akan Caldera, Eastern Hokkaido, Japan: Composite Caldera Inferred from Lithic Component Analysis, Petrology of Juvenile Materials and Bouguer Anomaly. American Geophysical Union (AGU) Fall meeting, San Francisco, December 2006.
（５）Gravley, D.M., Hasegawa, T., Nakagawa, M., Wilson, C.J.N. (2006) Composite Calderas: The Long and Short of It. American Geophysical Union (AGU) Fall meeting, San Francisco, December 2006.
（６）Hasegawa, T., Kamiyama, H., Nakagawa, M. and Yamamoto, A. (2007) Formation
processes and structure of Akan composite caldera, eastern Hokkaido, Japan.
International Scientific Russian-Japanese Symposium, Kunashir, October
2007.
（７）Okumura, K., Hasegawa, T., Ishii, E., Nakagawa, M. (2010) Extended and Revised Quaternary Tephrochronology of Hokkaido, North Japan with Special Reference to Micro-probe Technique. INTAV International Field Conference and Workshop on Tephrochronology, Volcanism and Human Activity, Kagoshima, May 2010.
（８）Matsumoto, A., Hasegawa, T., Nakagawa, M. (2011) Role of Mafic magmas, for Formation, Evolution and Eruption of Large Silicic magma system: in the case of the Largest Caldera-forming eruption of Kutcharo volcano (KpIV), Hokkaido, Japan. International Union of Geodesy and Geophysics (IUGG) General Assembly, Melbourne, June-July 2011.
（９）Hasegawa, T., Nakagawa, M., Yoshimoto, M., Ishizuka, Y., Hirose, W., Seki, S., Ponomareva, V., Alexander, R. (2011) Tephrostratigraphy and petrological study of Chikurachki and Fuss volcanoes, western Paramushir Island, northern Kurile Islands. 7th Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs (JKASP), Petropavlovsk-Kamchatsky, August 2011.
（１０）Ishizuka, Y., Nakagawa, M., Baba, A., Hasegawa, T., Kosugi, A., Uesawa, S., Matsumoto, A., Alexander, R. (2011) Along-arc variations of K-Ar ages for the submarine volcanic rocks in the Kurile Islands. 7th Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs (JKASP), Petropavlovsk-Kamchatsky, August 2011.
（１１）Ishizuka, Y., Nakagawa, M., Baba, A., Hasegawa, T., Kosugi, A., Uesawa, S., Matsumoto, A., Alexander, R. (2011) Geological structure of Kurile Islands: New insights from K-Ar ages of submarine volcanic rocks. Kuril Biocomplexity Project (KBP) Synthesis Workshop, Seattle, October-November 2011.
（１２）Nakagawa, M., Baba, A., Ishizuka, Y., Hasegawa, T., Ponomareva, V., Alexander, R. (2011) Two periods of synchronized, large, explosive eruptions after the last glacial stage in Kuril- Kamchatka are inferred from wide‐spread tephra: Possible effect to climate and human history during Holocene. Kuril Biocomplexity Project (KBP) Synthesis Workshop, Seattle, October-November 2011.
（１３）Hasegawa, T., Nakagawa, M., Yoshimoto, M., Ishizuka, Y., Hirose, W., Seki, S., Ponomareva, V., Alexander, R. (2011) Eruption history and temporal change of magma systems of Chikurachki and Fuss volcanoes, western Paramushir Island, northern Kurile Islands. Kuril Biocomplexity Project (KBP) Synthesis Workshop, Seattle, October-November 2011.
（１４）Amma-Miyasaka, M., Hasegawa, T., Nakagawa, M., Matsumoto, A. (2011) Change of magmatic system of caldera−forming eruptions of Kutcharo volcano, Eastern Hokkaido, Japan: Crustal melting and modification by mafic magma. American Geophysical Union (AGU) Fall meeting, San Francisco, December 2011.
（１５）Hasegawa, T., Matsumura, T. (2013) Transportation and deposition processes in pyroclastic flow and co-ignimbrite ash deposits from Mashu caldera volcano, eastern Hokkaido, Japan, inferred from grain size distribution, IAVCEI 2013 Scientific Assembly, Kagoshima, July 2013.
（１６）Hasegawa, T., Matsumoto, A., Nakagawa, M. (2013) The 120 ka Largest Caldera-forming eruption of Kutcharo volcano (Kp IV), eastern Hokkaido, Japan (Part 1): Implications for successive pyroclastic flows from multiple vent system, IAVCEI 2013 Scientific Assembly, Kagoshima, July 2013.
（１７）Matsumoto, A., Hasegawa, T., Nakagawa, M. (2013) The 120 ka Largest Caldera-forming eruption of Kutcharo volcano (Kp IV), east Hokkaido, Japan (Part 2): Generation and Preeruptive processes of Large Silicic magma system with Multiple Silicic magmas, IAVCEI 2013 Scientific Assembly, Kagoshima, July 2013.
（１８）Fujii, S., Mochizuki, N., Hasegawa, T., Okada, M., Shibuya, H. (2013) Further absolute paleointensity determination of welded tuffs correlated with widespread tephras: Absolute calibration of a relative paleointensity stack, American Geophysical Union (AGU) Fall meeting, San Francisco, December 2013.
（１９）Yokoyama, M., Kimura, M., Fujimura, K., Hasegawa, T., Tenya, K., Kawasaki, I., Kono, Y., Sakakibara, T. (2014) Superconductivity and magnetism in heavy-fermion compound CeCo(In1-xZnx)5, SCES2014, Grenoble, France, July 2014.
（２０）Nanayama, F., Shigeno, K., Hasegawa, T., Watanabe, K., Ishiwata, K., Ikeda, Y., Uchida, Y. (2014) Geomorphological Evolution of the Furenko Barrier System Due to Scismotectonics Along the Southern Kuril Subduction Zone, AOGS 2014, Sapporo, July 2014.
（２１）Miyabuchi, Y., Kobayashi, T., Hasegawa, T., Kaneko, K., Aka, F.T., Ohba, T., Kusakabe, M., Tanyileke, G., Hell, J.V. (2014) Pyroclastic Sequence in and Around Lake Nyos, Northwestern Cameroon, AOGS 2014, Sapporo, July 2014.
（２２）Fujii, S., Mochizuki, N., Hasegawa, T., Okada, M., Shibuya, H. (2014) Absolute paleointensity determinations of welded tuffs correlated with widespread tephras in marine sediment cores, JKASP 2014, Sapporo, September 2014.
（２３）Bergal-Kuvikas, O., Nakagawa, M., Muravyev, Y., Malik, N., Ovsyannikov, A., Ishizuka, Y., Hasegawa, T., Uesawa, S. (2014) Japanese-Russian project of study Klyuchevskoy volcano (Kamchatka, Russia): First results of the geological and petrological investigations, JKASP 2014, Sapporo, September 2014.
（２４）Hasegawa, T., Matsumoto, A., Nakagawa, M. (2014) Evolution of the 120 ka caldera-forming eruption from Kutcharo volcano (Kp IV), eastern Hokkaido, Japan: Geological and petrological evidence for multiple vent systems and rapid column collapse, 5th International Workshop on Collapse Calderas, Taupo, December 2014.
（２５）Nanayama, F., Shigeno, K., Hasegawa, T. (2015) Geomorphological evolution of Hashirikotan barrier spits resulting from seismotectonics along the Southern Kuril Subduction Zone, INQUA 2015, Nagoya, July 2015.
（２６）Hasegawa, T., Miyabuchi, Y., Kobayashi, T., Aka, F.T., Boniface, K., Issa, Nche, L.A., Nguemhe, C.S.F., Kaneko, K., Ohba, T., Kusakabe, M., Tanyileke, G., Hell, J.V. (2016) Eruption history of Nyos volcano, northwestern Cameroon. 9th International Conference on Volcanic Lakes, Yaounde, March 2016.
（２７）Otaka, R., Yokoyama, M., Mashiko, H., Hasegawa, T., Tenya, K., Kono, Y., Shimizu, Y., Ikeda, Y., Yoshizawa, H., Sakakibara, T. (2016) Superconductivity and non-Fermi liquid behavior in Ce(Co1-xNix)In5, International Conference on Strongly Correlated Electron Systems (SCES2016), Hangzhou, May 2016,.
（２８）Hasegawa, T., Mochizuki, N., Oiwane, H. (2016) Duration of the caldera-forming eruptions of Kikai volcano, Japan: preliminary estimation from paleomagnetic directions and secular variation, 6th International Workshop on Collapse Calderas, Hokkaido, September 2016.
（２９）Sekine, D., Hasegawa, T. (2016) Stratigraphy of pyroclastic deposits and debris avalanche deposit from Kamafusayama Volcano, Fukushima prefecture, Japan, 6th International Workshop on Collapse Calderas, Hokkaido, September 2016.
（３０）Hasegawa, T., Hasegawa, H., Kobayashi, T. (2016) Eruption sequence of BC 5,600 Mashu caldera-forming eruption, 6th International Workshop on Collapse Calderas, Hokkaido, September 2016.
（３１）Shibuya, H., Mochizuki, N., Hasegawa, T., Okada, M. (2017) Connecting marine and on-land paleoinitensity studies, 2017 GSA Cordilleran Section Meeting, Honolulu, May 2017 (Invited).
（３２）Nanayama, F., Shigeno, K., Watanabe, K., Hasegawa, T., Uchida, Y., Ikeda, Y. (2017) Geomorphological Evolution of Hashirikotan barrier spit controlled by Seismotectonics along the Southern Kuril Subduction Zone, JpGU-AGU Joint Meeting 2017, Chiba, May 2017.
（３３）Hasegawa, T., Hasegawa, H., Kobayashi, T. and Gravley, D.M. (2017) Emplacement of highly mobile and ‘cool’ block-rich PDCs from the Mashu caldera-forming eruption, eastern Hokkaido, Japan, IAVCEI 2017 Scientific Assembly, Portland, August 2017.
（３４）Sekine, D., Hasegawa, T. (2017) Eruption history and magma processes of pyroclastic deposits around Kamafusayama, southern Fukushima, Japan, IAVCEI 2017 Scientific Assembly, Portland, August 2017.
（３５）Suzuki, K., Yokoyama, M., Oshima, Y., Hasegawa, T., Tenya, K., Nakamura, S., Kittaka, S., Sakakibara, T., kawasaki, I., Higemoto, W., Watanabe, I., (2018) Non-Fermi-liquid behavior in heavy-fermion compound CeCo1-xNixIn5, ICM (International Conference on Magnetism) 2018, San Francisco, July 2018.
（３６）Hasegawa, T., Miyabuchi, Y., Kobayashi, T., Aka, F.T., Boniface, K., Issa, Nche, L.A., Nguemhe, C.S.F., Kaneko, K., Ohba, T., Kusakabe, M., Tanyileke, G., Hell, J.V. (2018) Eruption history of Nyos volcano, Eruption history and magma systems of Nyos volcano, northwestern Cameroon. Cities on Volcanoes 10, Naples, September 2018.
（３７）Nche, L.A., Hasegawa, T., Nemeth, K., Kobayashi, T., Aka, F.T. (2019) Petrographic and geochemical features of tephras from the Kamo monogenetic volcanic group, southern Kyushu, Japan. IAVCEI 5th Volcaic geology workshop, Palmerston North, Palmerstone North, February 2019.
（３８）Shibata, S., Hasegawa, T. (2020) Stratigraphy and eruption styles of 40 ka Kp I eruption, Kutcharo Volcano, Eastern Hokkaido, Japan. JpGU-AGU Joint Meeting 2020.
（３９）Kaneda, Y., Hasegawa, T. (2020) Geological and petrological studies at Nigorikawa Volcano, southwestern Hokkaido. JpGU-AGU Joint Meeting 2020.
（４０）Watanabe, S., Hasegawa, T., Oikawa, T., Geshi, N. (2020) Eruptive stratigraphy and magma compositions of the Tsubota stage (4.0-2.5 ka) in the southern part of the Miyakejima Volcano, Japan. JpGU-AGU Joint Meeting 2020.
（４１）Hasegawa, T., Mochizuki, N., Gravley, D.M., Kusu, C., Okada, M., Geshi, N., Kosik, S., Shibata, S., Kaenda, Y. (2020) Evaluation on the Durations of Large-scale caldera-forming Eruptions Based on Paleomagnetic Method: Examples from Aira caldera, Japan and Mamaku/Ohakuri Ignimbrites, New Zealand. JpGU-AGU Joint Meeting 2020.
（４２）Hasegawa, T., Greve, A., Gravley, D.M., Kusu, C., Okada, M., Kósik,
S., Mochizuki, N., Kaneda, Y. (2021) Paleomagnetic Estimations of the Duration
and Age of the Taupō Eruption, New Zealand, AGU Fall meeting 2021, New
Orleans & Online, December 2021.
（４３）Kósik, S., Hasegawa, T., Danisik, M., Nemeth, K., Okada, M., Schmitt, A.K., Friedrichs, B., (2022) New constraints on the age and timescale of activity of the Puketerata maar-lava dome complex, Taupō Volcanic Zone, New Zealand. Geoscience Society of New Zealand Annual Conference 2022, Palmerston North, November 2022.
（４４）Hasegawa, T., Aka, F.T., Watanabe, S., Nche, L.A., Asaah, A.N.E., Iwamori, H., Yokoyama, T., Sumino, H., Ichihara, M., Ohba, T. (2023) Upper Triassic mafic dykes of Lake Nyos II (comparisons with other dykes): Geochemical evidence for paleosubduction-modified mantle beneath Cameroon Line. IAVCEI 2023 Scientific Assembly, Rotorua (+ Online), January 2023.
（４５）Aka, F.T., Hasegawa, T., Watanabe, S., Asaah, A.N.E., Nche, L.A., Iwamori, H., Sumino, H., Yokoyama, T., Ichihara, M., Ohba, T. (2023) Did CAMP magmatism extend to the proto–Cameroon Volcanic Line in the Gulf of Guinea? IAVCEI 2023 Scientific Assembly, Rotorua (+ Online), January 2023.
（４６）Watanabe, S., Hasegawa, T., Oikawa, T., Geshi, N. (2023) Temporal development from crystal mush to melt-dominated reservoirs in Miyakejima volcano, Izu-Bonin arc, Japan. IAVCEI 2023 Scientific Assembly, Rotorua (+ Online), January 2023.
（４７）Shibata, S., Hasegawa, T. (2023) Generation process of large-scale phreatoplinian eruption, Kutcharo volcano, eastern Hokkaido, Japan: Inferred from stratigraphy and water content of volcanic glass, IAVCEI 2023 Scientific Assembly, Rotorua (+ Online), January 2023.
（４８）Gravley, D.M., Hasegawa, T., Mochizuki, N., Kusu, C., Okada, M. (2023) Recording the time interval between twin caldera-forming eruptions during a geomagnetic excursion: a paleomagnetic study in the Taupō Volcanic Zone. IAVCEI 2023 Scientific Assembly, Rotorua (+ Online), January 2023.
（４９）Imayama, T., Sato, A., Dripta, D., Kaneda, Y., Watanabe, S., Hasegawa, T., Minami, M., Wakasugi, Y., Wakaki, S., Keewook, Y., (2023) Magmatic response to the subduction initiation of Early Cretaceous Nidar Ophiolite complex, eastern Ladakh, NW Himalaya, EGU General Assembly 2023, Vienna (+ Online), 23–28 April 2023
（５０）
Gravley, D.M., Hasegawa, T., Mochizuki, N., Kusu, C., Okada, M. (2023) Closing the gap! A paleomagnetic solution to an enduring problem in decoding caldera-forming eruption timescales? 8th International Workshop on Collapse Calderas, Bolzano-Bozen, Italy, September 2023.
（５１）
Shibata, S., Hasegawa, T., Tanimoto, A., Mochizuki, N., Okada, M. (2023)
Paleomagnetic chronology for constraining the time scales of caldera-forming eruptions: case studies from Kutcharo ignimbrite I to Ⅱ/Ⅲ and Aso-4 tephra, eastern Hokkaido, Japan. 8th International Workshop on Collapse Calderas, Bolzano-Bozen, Italy, September 2023.
（５２）
Hasegawa, T., Shibata S., Kaneda, Y., Salazar, R., Kusu, C., Yamasaki, T., Madison, M., Wilson, C.J.N., Okada, M. (2023) Preliminary results of paleomagnetic chronology for estimating the duration of the 2.08 Ma Huckleberry Ridge Tuff from Yellowstone. 8th International Workshop on Collapse Calderas, Bolzano-Bozen, Italy, September 2023.