PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN

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[title in Japanese]

Pages i-xiii
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_i

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Paleomagnetic Study of the Omuroyama Volcano, Izu Peninsula

A. Baba, Y. Yamamoto

Session ID: A1-01
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_1

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Development of Fumarolic Activity Indices Based on Mountaineering Records: A Case Study of Temporal Variations over the Past 150 Years at Mount Iwate Volcano Area

ITOH Jun'ichi

Session ID: A1-02
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_2

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Tephra Stratigraphy and Magma compositional variations over the past 20,000 years of Eastern part of Kuju Volcano, Kyushu, Japan.

Masashi Fukuoka, Takehiro Ohta, Tomohiro Tsuji

Session ID: A1-03
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_3

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An overview of methods for dating andesitic lava flows

Chris Conway, Pedro Doll, Seiko Yamasaki, Osamu Ishizuka

Session ID: A1-04
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_4

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Geological reexamination of Bunka (1813) and Meiji (1884-1885) eruptions of Suwanosejima volcano

Tetsuo Kobayashi, Takaaki Hirayoshi

Session ID: A1-05
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_5

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New documentaly records of eruptions prior to the Bunka eruption (1813) of Suwanosejima volcano

Takaaki Hirayoshi, Tetsuo Kobayashi

Session ID: A1-06
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_6

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Temporal changes in volcanic plume activity of Kusatsu-Shirane volcano, Japan, using historical bird?s-eye views of the Kusatsu spa area

Akihiko Terada, Akiko Sekido

Session ID: A1-07
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_7

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The environmental impact of magmatic activity of Ontong Java Pleau

Takashi Sano, Osamu Ishizuka, Hironao Matsumoto, Masao Nakanishi

Session ID: A1-08
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_8

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Cretaceous Volcanic Activity of Okayama, SW Japan:Geology of Cretaceous Volcanic Rocks distributed in Asakuchi City, Okayama City, Bizen City, Tsuyama City

Motoki MOURI, Terumitu KITANO

Session ID: A1-09
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_9

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Long-term evolution of Toya caldera, Hokkaido, Japan

Yoshihiko Goto, Ryota Suzuki, Ralf Gertisser

Session ID: A1-10
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_10

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The last eruption of Daisen volcano: Age and eruption sequence

Mitsuru Okuno, Satoshi Ishiga, Reina Nakaoka, Andreas Auer, Tetsuo Kob ...

Session ID: A1-11
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_11

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Sequence of the 2019-2020 Eruption of Aso Volcano Revealed by Sulfur Isotope Analysis

Aoi HIRATA, Tsukasa OHBA, Yasuo MIYABUCHI, Ryohei TAKAHASHI, Pearlyn C ...

Session ID: A1-12
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_12

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Development of a Machine Learning-Based Method for Automatic Analysis of Pumice Texture -BSD Extraction via Weakly Supervised Learning for Region Segmentation-

Akane Kinoshita, Nobuo Geshi

Session ID: A1-13
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_13

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Density measurements for porous volcanic rocks using a simple water-displacement method

Takeuchi, S., Suwa, Y.

Session ID: A1-14
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_14

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The origin of the dark enclaves in the pumice of the Fukutoku-Oka-no-Ba 2021 eruption

Kanon Nishioka, Hidemi Ishibashi, Karin Nonoyama, Kenta Yoshida, Natsu ...

Session ID: A1-15
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_15

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Petrology and timescales of the Naruko caldera system: insight from orthopyroxene and quartz mineral zoning

Kotov A., Tsuchiya N., Okumura S., Bayarbold M., Ban M., Uno M., Miyag ...

Session ID: A1-16
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_16

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A model for gas-flushing controls on the eruption cycle at Sakurajima Volcano

Haruto Abe, Michihiko Nakamura, Naoki Araya, Mayumi Mujin, Daisuke Mik ...

Session ID: A1-17
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_17

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Water-rock interaction based on the hot spring water in Unzen-Jigoku Geothermal Area

Hikaru Sakamoto, Tomoharu Miyamoto, Kei Ikehata, Jun-ichiro Ishibashi, ...

Session ID: A1-18
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_18

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Gesis of the four end-member magmas of Daisen vocano, Soutwest Japan arc.

Tomoyuki. Shibata, Shunsuke Munechika, Ikuo Okada, Tomoaki Morishita, ...

Session ID: A1-19
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_19

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Reappraisal of the origin of boninites and the history of Chichijima

Yoshihiko Tamura, Iona M. McIntosh, Shuichi Kodaira, Narumi Takahashi, ...

Session ID: A1-20
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_20

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Development of an eruption prediction system incorporating ensemble prediction methods

Atsushi Yasuda

Session ID: A2-01
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_21

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Volcanic Disaster Risk Reduction Research Initiative for Response to a Large-Scale Eruption of Sakurajima Volcano

Iguchi, M., Kuramoto, Y., Wakita, H.

Session ID: A2-02
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_22

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Volcanic Eruptions and Advances of Sabo works in Volcanic Disaster Prevention Technology

Yasuhiro FUJISAWA

Session ID: A2-03
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_23

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Concerns regarding the "National Guidelines for Countermeasures against Widespread Ash Fall" and JMA's "Volcanic Ash Alerts and Advisories"

Masato Koyama

Session ID: A2-04
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_24

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Volcanic hazard risk assessment at ski resorts located on active volcanoes in northeast Japan

Nanako Tanaka, Kyoko Kataoka

Session ID: A2-05
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_25

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The 24th Children's Summer School on Seismology, Volcanology, and Geology: Why is Mt. Ontake so large?

Yamamoto, J., Arakura, K., Kawakami, A., Kondo, Y., Kim, H., Takeshita ...

Session ID: A2-06
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_26

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The primary factor causing volcanic H₂S accumulation in the lower atmosphere

Urumu Tsunogai, Yuuya Mizuno, Yutaka Miyagi, Yukihiro Nishioka, Fumiko ...

Session ID: A2-07
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_27

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Deep Hydrothermal Reservoir in Midagahara Volcano

Watanabe, T

Session ID: A3-01
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_28

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Magma-hydrothermal system inferred from fumarolic activity of Yakedake Volcano

Takeshi Saito, Shunsuke Nakayama, Kazuhiro Amita, Ryunosuke Kazahaya, ...

Session ID: A3-02
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_29

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Volcanic unrest with tilt deformation at Yakedake volcano in March 2025

Harutou Tanabe, Yoto Katano, Ryokei Yoshimura, Shiro Ohmi

Session ID: A3-03
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_30

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The 2024-25 volcanic unrest of Mt. Ontake

Ayumu Ishikawa, Tsukasa Kobayashi, Naoki Kudo

Session ID: A3-04
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_31

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The role of volcanic earthquakes in the hydrothermal circulation system of Mt. Ontake

Toshiko Terakawa, Yuta Maeda, Shinichiro Horikawa

Session ID: A3-05
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_32

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Vertical Deformation Detected by the Precise Levelling Survey after the 2014 Mt. Ontake Eruption (2016-2025)

Masayuki Murase, Yuta Maeda, Shinichiro Horikawa, Misaki Asai, Satoshi ...

Session ID: A3-06
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_33

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Comments on lahars and suspended sediment transportation related with the 2014 eruption at Ontake volcano

Kyoko S. Kataoka

Session ID: A3-07
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_34

CONFERENCE PROCEEDINGS FREE ACCESS

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Similarity of repeating trapdoor faulting at submarine calderas: Insights from broadband tsunami and seismic waveform comparison

Osamu Sandanbata, Shunsuke Takemura

Session ID: A3-08
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_35

CONFERENCE PROCEEDINGS FREE ACCESS

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Preliminary report of volcano observations in Tonga using DAS via seafloor cables during communication use

Shunsuke Nakao, Mie Ichihara, Masaru Nakano, Taaniela Kula, Rennie Vai ...

Session ID: A3-09
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_36

CONFERENCE PROCEEDINGS FREE ACCESS

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Seismic background level at Klyuchevskoy volcano group and Shiveluch volcano in 2022-2023

Galina Nataliya, Ichihara Mie, Nishida Kiwamu, Kaneko Takayuki, Dmitry ...

Session ID: A3-10
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_37

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Analyses of volcanic eruption tremors, harmonic tremor and explosion earthquakes, recorded in May 2025 by DAS observation

Takeshi Nishimura, Takashi Hirose, Kimiko Taguchi, Hisashi Nakahara, H ...

Session ID: A3-11
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_38

CONFERENCE PROCEEDINGS FREE ACCESS

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Activity of long-period earthquakes during the 2004 eruption at Asama Volcano

Takeo, M.

Session ID: A3-12
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_39

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Seismicity and focal mechanisms of deep low frequency earthquakes in the Iwate volcano

Genki Oikawa

Session ID: A3-13
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_40

CONFERENCE PROCEEDINGS FREE ACCESS

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Characteristics of Debris Flow after Ash fall and the effect of Volcanic Ash

Akihiko IKEDA

Session ID: A3-14
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_41

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Development of a numerical method for snowmelt type volcanic mudflows

Yuichi SAKAI, Hiroyuki A. SHIMIZU, Norifumi HOTTA

Session ID: A3-15
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_42

CONFERENCE PROCEEDINGS FREE ACCESS

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Muon flux measurements of the Nirasaki debris avalanche by using compact cosmic ray muon detectors

Goto, S., Obata, S., Goto, M., Kimoto, T., Gotoh, T.

Session ID: A3-16
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_43

CONFERENCE PROCEEDINGS FREE ACCESS

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How to create stories that help kindergarten children understand the mechanisms of volcanic eruptions and eruption prediction

Shintaro Hayashi

Session ID: A3-17
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_44

CONFERENCE PROCEEDINGS FREE ACCESS

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The Role Played by Mr. Saburō Mimatsu in the Volcanological Community

Hiroshi Sato, Shinichi Sugimoto, Shinichiro Ikebe, Toshiya Tanabe, Hik ...

Session ID: A3-18
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_45

CONFERENCE PROCEEDINGS FREE ACCESS

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Current status and issues of the Miyakejima- volcano summit caldera tour

Tomoki Aotani, Yasuto Isogaya, Hitomi Kamakura

Session ID: A3-19
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_46

CONFERENCE PROCEEDINGS FREE ACCESS

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Survey of audio coverage range using broadcasting equipment on Mt. Ontake

Yousuke Miyagi, Hideaki Shoji, Shun Nagafusa

Session ID: A3-20
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_47

CONFERENCE PROCEEDINGS FREE ACCESS

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Consideration of eruptive sequence at Sakurajima volcano by colorimetric values of bulk ash samples

Taketo Shimano, Taishi Yamada

Session ID: B1-01
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_49

CONFERENCE PROCEEDINGS FREE ACCESS

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Relationship Between the Cl/K Ratio of River Water and Volcanic Activity at Mt. Hakone, Japan

N. Numanami, T. Ohba, M. Yaguchi

Session ID: B1-02
Published: 2025
Released on J-STAGE: February 03, 2026

DOIhttps://doi.org/10.18940/vsj.2025.0_50

CONFERENCE PROCEEDINGS FREE ACCESS

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