[O-11] Overview of the recent activity of Nishinoshima and volcanoes in Ogasawara Islands

Sun. May 24, 2026 10:45 AM - 12:15 PM 201A (International Conference Hall, Makuhari Messe)

Chairperson:Yoshida K Kenta(Japan Agency for Marine-Earth Science and Technology), Tada Noriko(Japan Agency for Marine-Earth Science and Technology)

The Izu and Ogasawara Islands, extending southward from the Kanto coast, hold numerous active volcanoes, including Nishinoshima that has been erupting intermittently since 2013. Particularly in the Ogasawara Islands, located over 800 km from Honshu, volcanic activity has been observed in recent years not only at Nishinoshima but also at multiple other volcanoes such as Ioto (Iwo-Jima) and Fukutoku-Oka-no-Ba. These volcanic islands and submarine volcanoes, isolated far from land in the open ocean, serve as natural laboratories where unique phenomena can be observed not only in earth science but also in biology.
Researching remote island volcanoes in the open ocean presents numerous challenges, but researchers from diverse fields are collaborating to advance studies. This session aims to share the current state of volcanic activity on Nishinoshima and the Ogasawara Islands, as seen through the perspectives of researchers across various earth science disciplines and beyond. It seeks to bring the activity of distant volcanoes closer to the audience. Volcanic activities in the Ogasawara Islands offers several points of interest, such as Nishinoshima that is occasionally featured on TV programs, and drift pumice stranded on nearby beaches. While primarily targeting the general public interested in these phenomena, we welcome participation from all interested individuals.

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10:45 AM - 11:05 AM

[O11-01] Geologic history of Nishinoshima volcano: from the past to future?

*Kenta K Yoshida¹ (1. Japan Agency for Marine-Earth Science and Technology)

11:05 AM - 11:25 AM

[O11-02] Do changes in volcanic activity promote the diversity of initial processes in oceanic island ecosystems? : Biotic changes associated with the eruption of Nishinoshima Island

*Hideaki Mori¹, Kazuto Kawakami², Masataka Kawaguchi³ (1. Japan Wildlife Research Center, 2. Forestry and Forest Products Research Institute, 3. Earthquake Research Institute, the University of Tokyo)

11:25 AM - 11:45 AM

[O11-03] The Evolution of Scientific Observation at Nishinoshima and the Multifaceted Roles of Unmanned Aerial Vehicles (UAVs)

*Katsuya Noguchi¹ (1. JDRONE Inc.)

11:45 AM - 12:05 PM

[O11-04] Traces of volcanic activity from the Izu-Ogasawara arc on the coast

*Reona Hiramine¹ (1. National Museum of Japanese History)

Discussion (12:05 PM - 12:15 PM)