Journal Paper

• Jian Li, Jianxin Liu, Yasuo Ogawa, Rongwen Guo, Xulong Wang, Yongfei Wang, Keke Zhou, Jingdao Xu. 3D magnetotelluric inversion using an adaptive algebraic multi-resolution sampling approach, Geophysics, 90, 6, E225–E239, Nov. 2025.  Official location  
• Usui, Y., Uyeshima, M., Shinya Sakanaka, Yusuke Yamaya, Ogawa, Y., Ichiki, M., Honkura, Y., Kuroki, H., Group for MT observation around the Northern Kanto area. Crustal fluids and their relation to seismic activities in the Nikko-Ashio area of Northeastern Japan inferred by electrical resistivity imaging, Tectonophysics, Oct. 2025.
• Puwis Amatyakul, Songkhun Boonchaisuk, Patchawee Nualkhao, Yasuo Ogawa, Weerachai Siripunvaraporn. Retrospective earthquake spatial forecasting:magnetotelluric insights into fluid-driven intraplate seismicity in northern Thailand from 1994 to 2024, Earth, Planets and Space, Springer Nature, 77, Oct. 2025.
• Usui, Y., Uyeshima, M., Sakanaka, S., Hashimoto, T., Ichiki, M., Kaida, T., Yamaya, Y., Ogawa, Y., Masuda, M., Akiyama, T.. Application of the fast and robust bootstrap method to the uncertainty analysis of the magnetotelluric transfer function, Geophysical Journal International, ggaf162, May 2025.
• Hikaru Iwamori, Yasuo Ogawa, Tomomi Okada, Tohru Watanabe, Hitomi Nakamura, Tatsu Kuwatani, Kenji Nagata, Atsushi Suzuki, Masahiro Ichiki. Geofluid mapping reveals the connection between magmas, fluids, and earthquakes, communications earth & environment, Springer Nature, Vol. 6, May 2025.
• Keiichi Ishizu, Yasuo Ogawa, Kuo Hsuan Tseng, Takahiro Kunitomo, Norihiro Kitaoka, Grant Caldwell, Takuto Minami, Sohei Serita, Hiroshi Ichihara, Edward Alan Bertrand, Wiebke Heise. Controlled-source electromagnetic survey in a volcanic area: relationship between stacking time and signal-to-noise ratio and comparison with magnetotelluric data, Geophysical Journal International, Royal Astronomical Society, Volume 240, Issue 2, Page 1107-1121, Feb. 2025.

International Conference (Not reviewed / Unknown)

• Hill, G.J., Moorkamp, M., Bedrosian, P.A., Avram, Y., Cimarelli, C., Schultz, A., Ogawa, Y., Kamm, J., Kiyan, D., Comeau, M., Caricchi, L. New developments in electromagnetic investigations of magmatic systems, AGU fall meeting, Dec. 2025.
• Kitaoka, N., Ogawa, Y., Caldwell, T.G., Ishizu, K., Minami, T., Kirkby, A.. Monitoring a Dynamic Vapour-Dominated Geothermal System: A CSEM Study at Inferno Crater Lake, New Zealand, Dec. 2025.
• Watanabe, A., Uyeshima, M., Ogawa, Y., Ichiki, M., Yamaguchi, S., Usui, Y., Murakami, H., Ogawa, T., Oshiman, N., Yoshimura, R., Aizawa, K., Shiozaki, I., Kasaya, T.. Analysis of the Network-MT and conventional MT data measured in the Kii Peninsula, Southwestern Japan, International Joint Workshop on Slow-to-Fast Earthquakes 2025, Sept. 2025.
• Wakao, N., Ichiki, M., Motoyama, A., Ogawa, Y., Uyeshima, M., Asamori, K., Uchida, T., Hase, H., Koyama, T., Sakanaka, S., Yamaya, Y., Aizawa, K., Boonchaisuk, S., Kaida, T., Okada, T.. Vertical geofluid volume fraction profiles through the seismic swarm zones in NE Japan, inverted from electrical resistivity and P-wave velocity, IAGA-IASPEI, Sept. 2025.
• Watanabe, A., Uyeshima, M., Ogawa, Y., Ichiki, M., Yamaguchi, S., Usui, Y., Murakami, H., Ogawa, T., Oshiman, N., Yoshimura, R., Aizawa, K., Shiozaki, I., Kasaya, T.. Combined analysis of network-MT data and conventional long-period and wide-band MT data obtained around the source area of the Deep Low-Frequency Earthquakes in the Kii Peninsula, Southwestern Japan, AOGS, July 2025.

Domestic Conference (Not reviewed / Unknown)

• Makoto Uyeshima, 市來雅啓, 畑真紀, 海田俊輝, Yoshiya Usui, 渡部煕, Yasuo Ogawa, Norihiro Kitaoka. LEMI長周期MT観測装置の周波数特性の検定について, 地球電磁気・地球惑星圏学会, Nov. 2025.
• Norihiro Kitaoka, Yasuo Ogawa, Grant Caldwell, Keiichi Ishizu, Takuto Minami, Alison Kirkby. 3 次元節点変位を用いたアダプティブ六面体有限要素法によるCSEM モデリングと熱水系の変動解析への応用, 地球電磁気・地球惑星圏学会, Nov. 2025.
• Sakika Hoshino, Takuto Minami, Yuki Harada, Naoki Terada, Masahiko Sato, Yasuo Ogawa, Masaki Matsushima, Hisayoshi Shimizu. Induction Vector Analysis of InSight Magnetic Data to Constrain Martian Mantle Structure, 地球電磁気・地球惑星圏学会, Nov. 2025.
• Keiichi Ishizu, Norihiro Kitaoka, Yasuo Ogawa, Akihiko Terada. 周波数領域ドローン電磁探査システムの開発, 地球電磁気・地球惑星圏学会, Nov. 2025.
• Hiroki Nagaike, Wataru Kanda, Shohei Narita, 牧野雅彦, Yasuo Ogawa. 草津白根火山広域及び山頂域における 3 次元密度構造解析, 日本火山学会 2025 年度秋季大会, Oct. 2025.
• 重松弘道, koki aizawa, 井上智裕, 田辺暖柊, 松永佳大, 河野太紀, 中村謙佑, 平田一聖, 松原鈴, 勝山あすみ, 室伏龍真, 内田和也, Makoto Uyeshima, 小山崇夫, 橋本匡, 西本太郎, 秋山峻寛, 渡邊篤志, 阿部英二, 村松弾, Yasuo Matsunaga, 大石健登, 吉村令慧, 小松信太郎, 米田格, 三浦勉, 達山康人, 長岡愛理, 名田彩乃, 中川潤, 冨坂和秀, 吉川昌宏, 市原寛, Yasuo Ogawa, Shiyogo Masuda, Norihiro Kitaoka, 山下凪, 大中心, 櫻井未久, 吉澤史尚, 千馬竜太郎, 佐々木康気, 萬年一剛. 箱根火山の三次元比抵抗構造推定, 日本火山学会 2025 年度秋季大会, Oct. 2025.
• Hikaru Iwamori, Yasuo Ogawa, Geofluid Mapping Team. 地震波速度と電気伝導度に基づく Geofluid Mapping, 日本火山学会 2025 年度秋季大会, Oct. 2025.
• Hiromichi Shigmatsu, Koki Aizawa, Tomohiro Inoue, Harutou Tanabe, Keita Matsunaga, Taiki Kono, Kensuke Nakamura, Issei Hirata, Rin Matsubara, Asumi Katsuyama, Murofushi Ryuma, Kazunari Uchida, Makoto Uyeshima, Takao Koyama, Tasuku M. Hashimoto, Taro Nishimoto, Takahiro Akiyama, Atsushi Watanabe, Hideji Abe, Dan Muramatsu, Yasuo Matsunaga, Oishi Tatsuto, Ryokei Yoshimura, Shintaro Komatsu, Itaru Yoneda, Tsutomu Miura, Yasuto Tatsuyama, Nagaoka Airi, Ayano Nada, Nakagawa Jun, Kazuhide Tomisaka, Masahiro Yoshikawa, Hiroshi Ichihara, Yasuo Ogawa, Shogo Masuda, Norihiro Kitaoka, Nagi Yamashita, Miku Sakurai, Kokoro Onaka, Fumihisa Yoshizawa, Ryutaro Semba, Koki Sasaki, Kazutaka Mannen. Three-dimensional resistivity structure of Hakone volcano, Japan, JPGU, May 2025.
• Norihiro Kitaoka, Yasuo Ogawa, Caldwell T. Gtant, Keiichi Ishizu, Takuto Minami, Alison Kirkby. ニュージーランド国インフェルノ火口湖におけるEM-ACROSS法連続観測により検出された蒸気層変動, JPGU, May 2025.
• Keiichi Ishizu, Yasuo Ogawa, Norihiro Kitaoka, 曾 國軒, Sohei Serita, Takuto Minami, 國友 孝洋, 市原 寛, Grant Caldwell. 草津白根山での電磁モニタリング調査, JPGU, May 2025.
• Yoshiya Usui, Makoto Uyeshima, 坂中伸也, 橋本匡, 市來雅啓, 海田俊輝, 山谷祐介, Yasuo Ogawa, 増田正孝, 秋山峻寛. Three-dimensional electrical resistivity structure beneath the Nikko-Ashio area, Northeastern Japan, JPGU, May 2025.
• Yoshiya Usui, Makoto Uyeshima, 坂中伸也, 橋本匡, 市來雅啓, 海田俊輝, 山谷祐介, Yasuo Ogawa, 増田正孝, 秋山峻寛. Three-dimensional electrical resistivity structure beneath the Nikko-Ashio area, Northeastern Japan, JPGU, May 2025.
• Yoshiya Usui, Makoto Uyeshima, 坂中伸也, 橋本匡, 市來雅啓, 海田俊輝, 山谷祐介, Yasuo Ogawa, 増田正孝, 秋山峻寛. Three-dimensional electrical resistivity structure beneath the Nikko-Ashio area, Northeastern Japan, JPGU, May 2025.
• 若尾 尚幸, 市來 雅啓, 本山 葵, Yasuo Ogawa, Makoto Uyeshima, 浅森 浩一, 内田 利弘, Hideaki Hase, 小山 崇夫, 坂中 伸也, 山谷 祐介, koki aizawa, Boonchaisuk Songkhun, 海田 俊輝. 東北地方南部地殻比抵抗構造の再解析と比抵抗と地震波速度を用いた地殻流体量の推定, JPGU, May 2025.
• Sakika Hoshino, Takuto Minami, Yuki Harada, Naoki Terada, Masahiko Sato, Yasuo Ogawa, Masaki Matsushima, Hisayoshi Shimizu. On the feasibility of the Horizontal Spatial Gradient method for inference of Martian subsurface resistivity structure, JPGU, May 2025.
• Watanabe, A., Uyeshima, M., Ogawa, Y., Ichiki, M., Yamaguchi, S., Usui, Y., Murakami, H., Ogawa, T., Oshiman, N., Yoshimura, R., Aizawa, K., Shiozaki, I., Kasaya, T.. Analysis of Long-Period MT Data and Wideband MT Data in the Kii Peninsula, Southwestern Japan, JPGU, May 2025.
• Norihiro Kitaoka, Yasuo Ogawa, Grant Caldwell, Alison Kirkby, Keiichi Ishizu, Takuto Minami. インフェルノ火口湖におけるEM-ACROSS法連続観測により推定される蒸気層変動, CA研究会, Mar. 2025.
• Yasuo Ogawa, Keiichi Ishizu, Norihiro Kitaoka, 曾 國軒, Takuto Minami, Caldwell T. Gtant, Kirkby Alison. 電磁誘導による火山の比抵抗構造イメージングとモニタリング, 第72回応用物理学会春季学術講演会, Mar. 2025.
• 畑真紀, Grant Caldwell, Makoto Uyeshima, Alex Caldwell, Yasuo Ogawa, Ted Bertrand, Stewart Bennie, Wiebke Heise, 吉村令慧. ニュージーランド北島の火山・非火山地域における長周期MT法観測（２）, CA研究会, Mar. 2025.
• Yoshiya Usui, Makoto Uyeshima, 坂中伸也, Masahiro Hashimoto, 市來雅啓, 海田俊輝, 山谷祐介, Yasuo Ogawa, masataka masuda, 秋山峻寛. Fast and robust bootstrap法を用いたMT応答関数の誤差推定, CA研究会, Mar. 2025.
• Keiichi Ishizu, Norihiro Kitaoka, Yasuo Ogawa, Akihiko Terada. 周波数領域ドローン電磁探査システムの開発, 日本火山学会 2025 年度秋季大会, 2025.

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