Research on multibody dynamics in engineering and science is developing at a high pace in Japan and in the world. These activities provide efficient and powerful solution tools for solving complicated dynamic problems with control via theoretical or high performance in-house and/or general purpose computer programs in academic and industrial fields. Thus, advancement of research is an important index for measuring competitiveness in education and industry in terms of “dynamics and control”. The aim of this paper is to present an overview of the various research activities of multibody dynamics in Japan.