Microsoft Japan Co., Ltd headquarters building 31st floor Shinagawa Grand Central Tower 2-16-3, Konan, Minato-ku, Tokyo, 108-0075 Japan RubyHiroba 2013, the play field for Rubyists Our official site is: http://rubyhiroba.org/2013. This page is to register yourself as attendee. Check the official site out to confirm the details of RubyHiroba 2013. RubyHiroba 2013 is a single day, multi-tracked(it’l