http://www.m-messe.co.jp/index_e.html
Approx. 30 minutes from Tokyo Station and 12 minutes from Soga Station to Kaihin Makuhari Station by Keiyo Line, 5 minutes walk to Makuhari Messe.
Approx. 40 minutes from Akihabara Station to Makuhari Hongo Station by JR Sobu Line, 15 minutes by bus to Makuhari Messe.