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安川要平/Yohei Yasukawa
@yasulab
Co-founder of @CoderDojoJapan & @MitouJr. CEO @YassLab, developing @RailsTutorialJP & @RailsGuidesJP. YouTube→youtube.com/yasulab
CASE Shinjuku, Tokyo
yasslab.jp
Joined June 2009
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