the play field for Rubyists — June 2 at Microsoft Japan Co., Ltd headquarters building 31st floor RubyHiroba 2013, the play field for Rubyists — June 2 RubyHiroba 2013 is a single day, multi-tracked(it’ll be 3 - 4 tracks, we hope) Ruby related event which will be held in downtown Tokyo, in front of Shinagawa St. on the day after RubyKaigi 2013 — June 2. Hiroba(広場) means ‘play field’ in Japanese. Y