All source code excluding bench/src/main/resources/large.json is licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0.
bench/src/main/resources/large.json, whose original author is Government Chief Information Officers' Portal, Japan, is licensed under CC-BY 4.0: https://creativecommons.org/licenses/by/4.0/deed.ja.