International Union of Geodesy and Geophysics, International Association of Volcanology and Chemistry of the Earth's InteriorVolcanological society of Japan and National Committee of Volcanology and Chemistry of the Earth's Interior, Science Council of Japan1995
International Union of Geodesy and Geophysics, International Association of Volcanology and Chemistry of the Earth's InteriorNational Committee for Volcanology and Chemistry of the Earth's Interior, Science Council of Japan1987