(A) Academical societies
Co-opted: Working Group on Scour Research, International Association for Hydro-Environment Engineering and Research (IAHR) (2026-)
Associate editor: International Journal of Sediment Research (2024-)
Session organizer: Rivers, Lakes, Coastal and Marine Session of JSFM Annual Meeting, the Japan Society of Fluid Mechanics (2024-2026)
Director: International Association for Hydro-Environment Engineering and Research (IAHR) Japan Chapter (2022-)
Secretary General: Global Research Network for Indigenous Knowledge in Water Resources Management (2022-)
Secretary: Subcommittee on Fundamental Hydraulics, Committee on Hydroscience and Engineering, Japan Society of Civil Engineers (2021-2023)
Member: Subcommittee on Disaster Research, Committee on Underground Space Research, Japan Society of Civil Engineers (2019-)
Member: Subcommittee on Fundamental Hydraulics, Committee on Hydroscience and Engineering, Japan Society of Civil Engineers (2018-)
Associate editor: International Journal of Erosion Control Engineering (2011-)
Editorial board member: International Journal of Sediment Research (2011-2024)
(B) Social
activities
Chairman: Committee to Investigate Pumping-Station Operations During the Heavy Rainfall Beginning August 10, 2025, Kumamoto City (2025-2026)
Member: Committee on Rainwater Management Research, Japan Institute of Wastewater Engineering and Technology (2023-)
Member: River Technical Committee, Kyushu Regional Development Bureau, MLIT (2023-)
Advisor: Road Construction Project of Harimaya Ikku Line, Kochi Prefecture (2018-)
Expert: Committee on Disaster Mechanism of the Kuma Bridge, Kumamoto Prefecture (2023)
Instructor: JICA Training Course on Comprehensive Disaster Risk Reduction in Small Islands (Sediment Disasters: Mechanisms and Countermeasures) (2021, 2022)
Instructor: Disaster Management Training School of Kochi Prefecture on Building Preparedness for Flood and Sediment Disasters (2021)
(C) Other
activities
Key characteristics of the disasters caused by the August 2025 Kumamoto Floods, Special Lecture for the Public at the Tokushima University Disaster and Environment Cafe (Aug. 27, 2026)
KAB Special TV Program：“73 Years Since the Shirakawa Great Flood” — What If a Flood of the Same Scale Happened Today? （Jun. 26, 2026）
RKK Special TV Program：What Are “Urban Floods” in Central City Areas? （Sep. 18, 2025）
Education on Community Safety: Water-related Disasters, Special Lecture for Special Support School Attached to the Faculty of Education, Kumamoto University (Dec.10, 2024)
Understanding debris flow: mechanisms and countermeasures, Special Lecture for Kumamoto Prefectural Daini High School (Nov. 14, 2024)
