But after the Meiji Restoration, the Nagasaki Settlement gradually fell into decline, and it consequently became difficult to continue to maintain a police force; as a result, in 1879 the settlement relinquished its police powers to the Nagasaki Prefectural Police Department.
しかし明治維新後、長崎居留地は次第に衰退し警察の維持が難しくなったため、1879年に長崎県警察部に警察権を返上した。