Bio
Rails committer, Ruby committer, Haml committer.
Creator of Rails plugins such as Kaminari, active_decorator, action_args, stateful_enum, heavens_door, still\life, roundabout, i18n_generators, html5_validators, jb, himl, motorhead, erd, database_rewinder, etcetc.
Founder of “Asakusa.rb”, the most active Ruby community in Japan.
Chief Organizer of RubyKaigi.