Web20 Expo Tokyo December 2, 2008

Web 2.0 EXPO Tokyo is designed to be the major annual Japanese gathering of the technical, design, marketing, and business professionals who are building the next generation web.
The event will have three major components: an educational conference, including both traditional seminar formats and elements of peer-to-peer learning; a major tradeshow showcasing the sellers of tools, technologies, services and infrastructure; and networking events targeted at internet entrepreneurs, venture capitalists, and business development executives.

Official Website: http://tokyo.web2expo.com/