noun
Regional Civil Aviation Bureau
Official name of a government body under the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) responsible for regional civil aviation matters.
地方航空局は空港の安全を監督している。
The Regional Civil Aviation Bureau oversees airport safety.
The parent ministry; 地方航空局 is one of its regional bureaus.
Compound of 地方 (region) + 航空 (aviation) + 局 (bureau).