You can download this logo in SVG/PNG/JPG format. Right click on this logo with Chrome or Firefox on a desktop PC. You need a wonderful Google Noto Sans for correct rendering.
Open Data Day is a gathering of citizens in cities around the world to write applications, liberate data, create visualizations and publish analyses using open public data to show support for and encourage the adoption open data policies by the world's local, regional and national governments. Each logo of the city has a different styles made from city's name, lat and lng. Made by Yuichi Yazaki for Internationl Open Data Hackathon from Tokyo with love :-)