This document summarizes the story of OpenSource Cafe, a coworking space and library in Shimokitazawa, Tokyo started by Tsutomu Kawamura. It began as a monthly meetup space for open source software events in 2009. In 2011, Kawamura converted his mother's garage into a small coworking cafe open on Wednesdays, which grew in popularity. It now hosts regular events and clubs for WordPress, coding, art, and more. The cafe also functions as a library through the Librize app, allowing local book sharing.