The Combined Exhibition of Advanced Technologies (commonly known as CEATEC) is the largest annual IT and electronics trade show in Japan. It is held in early October at the Makuhari Messe convention center just outside of central Tokyo. Virtually every major Japanese electronics maker has a presence at the show, which serves as a platform to introduce cutting-edge achievements in information and electronic technologies.
CEATEC is open to the public on all but the first day of the exhibition, on which special invitations or registrations for members of the industry and press are required. Visitors to the show will have the chance to check out and try new innovative technologies and the latest, unreleased gadgets made by both Japanese and international electronics makers. The exhibition space is divided into several zones covering themes of business, industry and home.
CEATEC is held at the Makuhari Messe convention center, a 5-10 minute walk from JR Kaihin-Makuhari Station. From Tokyo Station, Kaihin-Makuhari Station can be reached by rapid (30 minutes) or local trains (40 minutes) along the JR Keiyo Line (550 yen). There are also a few limited express trains covering the distance in 25 minutes (unreserved seat: 1060 yen).
Note that the platform of the JR Keiyo Line at Tokyo Station is located a ten minute walk from the station's other platforms.
information source: japan-guide.com
Free (advance online registration required)