We will discuss about OSS meetups and community driven value creation. There are many active user group meetings, seminars, meetups, events, and parties in Japan. We exchange not only technical information but also tacit knowledge and we are building network of OSS professionals. We will share OSS community management tips, challenge, and show my experience. I have led an informal seminar series, known as Linux Kernel Code Reading Party with members of YLUG (Yokohama Linux Users Group) since April of 1999. Also I am a founder of Study groups study group.