General Equilibrium Theory Workshop in Asia (GETA) was held at Keio University on June 11, 2004. As the name suggests, the main topic of GETA is the general equilibrium analyses of market economies and its direct applications to economic problems, such as finance theory and dynamic macroeconomics theory. However, this should not be taken as a restriction: GETA is also interested in related fields, such as the analyses of the nexus between market and non-market institutions, the aim of our 21st Century COE program. This year, we had nine presentations by four Japanese economists and five guests from foreign countries including prominent economists, Bernard Cornet, Laurent Calvet, and In-Koo Cho.