(based on hand count by kakutani, they spelled their affiliation in inconsistent way. thanks to sprk2012 team for providing *.yml!)
- 5: Eiwa System Management, Inc.
- 4: COOKPAD Inc.
- 3: Network Applied Communication Laboratory Ltd.
- 3: paperboy&co., Inc.
- 2: ClearCode Inc.
- 2: Enishi Tech Inc.
- 2: GitHub
- 3: Heroku
- 1: Appcelerator, Inc. / FrogApps, Inc.
- 1: Applicake
- 1: Codecademy
- 1: Engine Yard, Inc
- 1: everyleaf.com
- 1: Microsoft Japan
- 1: National Institute of Advanced Industrial Science and Technology (AIST)
- 1: Nomura Research Institute, Ltd.
- 1: Pivotal Labs (NYC)
- 1: Safew Labs
- 1: salesforce.com,inc
- 1: University of New South Wales.
(There are many speakers wrote more than one community in their profile.)
- 4: Asakusa.rb
- 3: Ruby Sapporo
- 1: JRuby/Nokogiri Project
- 1: Rails Girls
- 1: Ruby no Kai(Japan Ruby Group)
- 1: Ruby User Group Bangalore
- 1: Ruby User Group Mumbai
- 1: Sapporo.js
- 1: shinjuku.rb
- 1: Team OyasumiSupport#end_of_day
- 1: team.pasra.tk
- 1: Tokyu.rb
- 1: Openstack India
- 1: Ubuntu India
- 1: #tkbb(Tokyo Bouldering Club)
- 1: #tkbjs(Online Study TokyoBouldering.js)