Taro Matsuzawa has been working for Georepublic for 10 years now. He has had experience in many open source communities since his student days, but had not yet joined the OSGeo community until he joined Georepublic. He is now a FOSS4G specialist and has presented at FOSS4G conferences in Japan. For a ten years he has been a committer for OpenMapTiles and several OpenSource projects, and has contributed more than 20 projects to Japanese companies and municipalities. In this issue, he would like to share some of the insights he has gained from his work and the OSS community. I will mainly talk about the basics and applications of Game Tile[1] technology, a small-scale map solution using pgRouting[2], and Python3 support for the ckanext-spatial plugin[3]. 1. leafletjs.com/SlavaUkraini/examples/crs-simple/crs-simple.html 2. pgrouting.org/ 3. github.com/ckan/ckanext-spatial/pull/249