- 2002-2009 : Titular member of the Commission on Isotopic Abundances and Atomic Weights, the International Union of Pure and Applied Chemistry (IUPAC)
- 1998-2001: Associate member of the Commission on Isotopic Abundances and Atomic Weights, the International Union of Pure and Applied Chemistry (IUPAC)
- 1998-1999, 2002-2005: Councilor of The Geochemical Society of Japan
Shigekazu Yoneda
Activities in academic conferences