https://rubykaigi.org/2023/ May 11th - 13th, 2023 Matsumoto Performing Arts Centre (まつもと市民芸術館), Nagano, Japan 再生リスト https://www.youtube.com/playlist?list=PLbFmgWm555yYvWS7VGTFipF7ckduvSeT- RubyKaigi 2