Presentations

Conference Presentations (First Author)

2025

  • Keiichi Ishizu, Resource exploration using electrical and electromagnetic surveys, Young Researchers Symposium on Resources 2025, 2025.01
  • Keiichi Ishizu, Yasuo Ogawa, Norihiro Kitaoka, Kuo Hsuan Tseng, Sohei Serita, Takuto Minami, Takahiro Kunitomo, Hiroshi Ichihara, Grant Caldwell, Electromagnetic monitoring survey at Kusatsu-Shirane Volcano, JpGU 2025, Makuhari, Chiba, 2025.5.
  • Keiichi Ishizu, Norihiro Kitaoka, Yasuo Ogawa, Akihiko Terada, Development of a frequency-domain drone-borne electromagnetic survey system, Volcanological Society of Japan 2025 Fall Meeting, Matsumoto, 2025.10.1-3
  • Keiichi Ishizu, Norihiro Kitaoka, Yasuo Ogawa, Akihiko Terada, Prototype development of a drone-borne electromagnetic survey system, SGEPSS, Kobe University, 2025.11

2024

  • Keiichi Ishizu, Ogawa, Y., Kitaoka, N., Tseng, K.H., Serita, S., Minami, T., Ichihara, H., Kunitomo, T., Caldwell, G., Bertrand, E.A., Heise, W., Controlled-source electromagnetic survey for investigating Kusatsu-Shirane volcano, Japan, EMIW 2024, Beppu, Japan, 2024.9
  • Keiichi Ishizu, Kasaya, T., Goto, T. N., Koike, K., Siripunvaraporn, W., Iwamoto, H., … & Ishibashi, J. I., Effective towed receiver offsets for controlled-source electromagnetic survey for imaging both seafloor and embedded massive sulfides, Japan, EMIW 2024, Beppu, Japan, 2024.9

2023

  • Keiichi Ishizu, Yasuo Ogawa, Kuo Hsuan Tseng, Takahiro Kunitomo, Norihiro Kitaoka, Grant Caldwell, Takuto Minami, Sohei Serita, Hiroshi Ichihara, Ted Bertrand, Wiebke Heise, 3D inversion of onshore controlled source electromagnetic data in the Kusatsu-Shirane Volcano, 3DEM7, 2023.11.15
  • Keiichi Ishizu, Yasuo Ogawa, Hiromi Fukino, Masahiro Ichiki, Three-dimensional resistivity imaging of supercritical geothermal reservoir in Onikobe area, Japan, Water-Rock Interaction (WRI-17), 2023.8.17
  • Keiichi Ishizu, Takafumi Kasaya, Tadanori Goto, Katsuaki Koike, Weerachai Siripunvaraporn, Hisanori Iwamoto, Yoshifumi Kawada, Jun-ichiro Ishibashi, Development of a marine electromagnetic survey method capable of mapping both mound-type and embedded seafloor massive sulfide deposits, GEOINFORUM-2023, 2023.6.23
  • Keiichi Ishizu, Yasuo Ogawa, Kuo Hsuan Tseng, Sohei Serita, Takahiro Kunitomo, Takuto Minami, Hiroshi Ichihara, Grant Caldwell, Wiebke Heise, Ted Bertrand, Application of EM-ACROSS to investigate underground structures of the Kusatsu-Shirane Volcano, Japan, JpGU 2023, 2023.5.24

2022

  • Keiichi Ishizu, Yasuo Ogawa, Hiromi Fukino, Masahiro Ichiki, Investigation of supercritical geothermal reservoir in Onikobe area by MT method, Geothermal Research Society of Japan 2022 Annual Meeting, 2022.11.8
  • Keiichi Ishizu, Distribution survey of seafloor massive sulfide deposits by electrical and electromagnetic exploration, Young Researchers Symposium on Seafloor Resource Exploration, 2022.8.8
  • Keiichi Ishizu, Yasuo Ogawa, Resistivity imaging of coastal freshwater: A feasibility study, International Workshop on Offshore Freshened Groundwater Research, 2022.6.27
  • Keiichi Ishizu, Takafumi Kasaya, Tadanori Goto, Katsuaki Koike, Weerachai Siripunvaraporn, Hisanori Iwamoto, Improvement of resistivity imaging of seafloor massive sulfide deposits by integrated inversion of CSEM data measured by towed and seafloor receivers, The 33rd Annual Meeting of Japan Society of Geoinformatics, 2022.6.23
  • Keiichi Ishizu, Yasuo Ogawa, Keishi Nunohara, Noriyoshi Tsuchiya, Masahiro Ichiki, Hideaki Hase, Wataru Kanda, Shinya Sakanaka, Yoshimori Honkura, Yuta Hino, Kaori Seki, Kuo Hsuan Tseng, Yusuke Yamaya, Toru Mogi, Investigation of supercritical geothermal reservoir by MT method, JpGU 2022, 2022.5.24

2021

  • Keiichi Ishizu, Yasuo Ogawa, A feasibility study of offshore–onshore resistivity imaging of freshwater using a controlled source electromagnetic method, AGU Fall Meeting 2021, 2021.12.15
  • Keiichi Ishizu, Yasuo Ogawa, Keishi Nunohara, Noriyoshi Tsuchiya, Masahiro Ichiki, Hideaki Hase, Wataru Kanda, Shinya Sakanaka, Yoshimori Honkura, Yuta Hino, Kaori Seki, Kuo Hsuan Tseng, Yusuke Yamaya, Toru Mogi, Estimation of spatial distribution and fluid fraction of a potential supercritical geothermal reservoir by magnetotelluric data: a case study from Yuzawa geothermal field, NE Japan, AGU Fall Meeting 2021, 2021.12.15
  • Keiichi Ishizu, Weerachai Siripunvaraporn, Tadanori Goto, Katsuaki Koike, Takafumi Kasaya, Hisanori Iwamoto, Efficient 3D marine electromagnetic survey method, The 145th SEGJ Conference, 2021.11.24
  • Keiichi Ishizu, Yasuo Ogawa, Keishi Nunohara, Noriyoshi Tsuchiya, Masahiro Ichiki, Hideaki Hase, Wataru Kanda, Shinya Sakanaka, Yoshimori Honkura, Yuta Hino, Kaori Seki, Kuo Hsuan Tseng, Yusuke Yamaya, Toru Mogi, Estimation of spatial distribution and fluid fraction of a supercritical geothermal reservoir using MT data: A case study in the Yuzawa geothermal field, NE Japan, The 145th SEGJ Conference, 2021.11.24
  • Keiichi Ishizu, Yasuo Ogawa, Keishi Nunohara, Noriyoshi Tsuchiya, Masahiro Ichiki, Hideaki Hase, Wataru Kanda, Shinya Sakanaka, Yoshimori Honkura, Yuta Hino, Kaori Seki, Kuo Hsuan Tseng, Yusuke Yamaya, Toru Mogi, Estimation of spatial distribution and fluid fraction of a supercritical geothermal reservoir using MT data: A case study in the Yuzawa geothermal field, NE Japan, Geothermal Research Society of Japan 2021 Annual Meeting, 2021.10.29
  • Keiichi Ishizu, Ogawa, Y., Coastal resistivity imaging of freshwater using a controlled source electromagnetic method, The 14th SEGJ International Symposium, 2021.10
  • Keiichi Ishizu, Weerachai Siripunvaraporn, Tadanori Goto, Katsuaki Koike, Takafumi Kasaya, Hisanori Iwamoto, Cost-effective 3D marine electromagnetic survey method, MMIJ 2021 Fall Meeting (Online), 2021.9
  • Keiichi Ishizu, Ogawa, Y., Offshore–onshore resistivity imaging of freshwater using a controlled source electromagnetic method, IAGA-IASPEI 2021, 2021.8
  • Keiichi Ishizu, Ogawa, Y., Offshore–onshore seamless resistivity imaging of freshwater using a controlled source electromagnetic method, JpGU 2021, 2021.6
  • Keiichi Ishizu, Yasuo Ogawa, Toru Mogi, Yusuke Yamaya, Toshihiro Uchida, Imaging capability of a deep low-resistivity body using the MT method: An example of supercritical geothermal resource exploration, The 144th SEGJ Conference, 2021.6
  • Keiichi Ishizu, Yasuo Ogawa, Toru Mogi, Yusuke Yamaya, Toshihiro Uchida, Imaging capability of a deep low-resistivity body using the MT method: An example of supercritical geothermal resource exploration, JpGU 2021, 2021.6

2020

  • Keiichi Ishizu, Yasuo Ogawa, Feasibility study for elucidating seamless offshore-onshore geological structures using the CSEM method, The 143rd SEGJ Conference, 2020.11
  • Keiichi Ishizu, Yasuo Ogawa, Keishi Nunohara, Noriyoshi Tsuchiya, Geothermal resource exploration in the southern area of the Sanzugawa Caldera, Akita Prefecture, using the MT method (Preliminary report), Geothermal Research Society of Japan 2020 Annual Meeting, 2020.11
  • Keiichi Ishizu, Tadanori Goto, Katsuaki Koike, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, 3D inversion of CSEM data measured by towed and seafloor receivers, The 143rd SEGJ Conference, 2020.10

2019

  • Keiichi Ishizu, T. Goto, W. Siripunvaraporn, K. Koike, T. Kasaya, H. Iwamoto, Imaging of seafloor massive sulfide deposits using a 3-D data-space Occam inversion algorithm for marine CSEM survey data, AGU Fall Meeting 2019, 2019.12
  • Keiichi Ishizu, Tadanori Goto, Chatchai Vachiratienchai, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, Imaging of seafloor massive sulfide deposits using 3D CSEM inversion method, The 146th SGEPSS Fall Meeting, 2019.10
  • Keiichi Ishizu, Tadanori Goto, Katsuaki Koike, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, Imaging of seafloor massive sulfide deposits based on 3D marine electromagnetic inversion using geostatistical constraints, MMIJ 2019 (Kyoto) Annual Meeting, 2019.9
  • Keiichi Ishizu, Tadanori Goto, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, Exploration of seafloor massive sulfide deposits using 3D CSEM inversion method, The 140th SEGJ Conference, 2019.5

2017

  • Keiichi Ishizu, Tadanori Goto, Chatchai Vachiratienchai, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, Two-Dimensional Inversion of Marine DC Resistivity Survey using FCM Clustering Constraint, The 142nd SGEPSS Fall Meeting, 2017.10
  • Keiichi Ishizu, Tadanori Goto, Chatchai Vachiratienchai, Weerachai Siripunvaraporn, Takafumi Kasaya, Hisanori Iwamoto, 2D inversion of marine towed DC resistivity survey using FCM clustering constraints, The 136th SEGJ Conference, 2017.6
  • Keiichi Ishizu, T. Goto, C. Vachiratienchai, W. Siripunvaraporn, T. Kasaya, H. Iwamoto, Resistivity structure around off-Okinawa hydrothermal area using two-dimensional inversion of marine resistivity survey, Japan Geoscience Union Meeting 2017, 2017.5

2016

  • Keiichi Ishizu, C. Vachiratienchai, W. Siripunvaraporn, T. Goto, T. Kasaya, H. Iwamoto, Development and Exploration Test of Two-Dimensional Inversion of Marine DC Resistivity Survey, International Symposium on Earth Science and Technology 2016, 2016.12
  • Keiichi Ishizu, C. Vachiratienchai, W. Siripunvaraporn, T. Goto, Development of Two-Dimensional Inversion of Marine DC resistivity survey, The 23rd Electromagnetic Induction Workshop, 2016.8
  • Keiichi Ishizu, C. Vachiratienchai, W. Siripunvaraporn, Tadanori Goto, Trial of seafloor massive sulfide deposit exploration using marine DC resistivity survey, The 27th Annual Meeting of Japan Society of Geoinformatics, 2016.6
  • Keiichi Ishizu, C. Vachiratienchai, W. Siripunvaraporn, T. Goto, Development of Two-dimensional Inversion of Marine DC resistivity survey, Japan Geoscience Union Meeting 2016, 2016.5

2015

  • Keiichi Ishizu, H. Mikada, T. Goto, J. Takekawa, Accuracy evaluation of MT response calculated with Particle Method, Japan Geoscience Union Meeting 2015, 2015.5
  • Keiichi Ishizu, Tadanori Goto, Study on accuracy evaluation of particle method in MT responses, The 132nd SEGJ Conference, 2015.5

Conference Presentations (Co-authored)

2025

  • Yasuo Ogawa, Keiichi Ishizu, Norihiro Kitaoka, Kuo Hsuan Tseng, Takuto Minami, Grant T. Caldwell, Alison Kirkby, Resistivity structure imaging and monitoring of volcanoes using electromagnetic induction, The 72nd JSAP Spring Meeting