This document promotes attending RubyKaigi2009, the largest Ruby conference in Japan, held July 17-19, 2009 in Tokyo. It provides details on the history and growth of the conference since 2006. It encourages more international attendees and speakers to help reduce language barriers and share knowledge between Japanese and non-Japanese Rubyists. Attendees can look forward to talks from legendary Japanese Rubyists as well as international speakers from previous years who recommend attending.