First of all, a big thanks to my employer, HDE Inc., for sending me to YAPC::EU 2015 in Granada. I think I was able to make new friends, and leave a good impression about Japan. My Main TalkOn the second day, I gave my talk, “YAPC::Asia Tokyo Behind The Scenes, Or How We Organize A Conference For 2000 Attendees” This was basically the same talk I did in YAPC::NA 2015, but I redid the whole sequenc