In the immediate aftermath of the foreign settlement's establishment, the troops known as the 'Naniwatai' (Osaka Group) and the 'Torishimari Bansotsu' (Supervisory Guardsmen), who later became sections of the Osaka Metropolitan Police Department, carried out security and police duties in the settlement.
居留地設置直後は、後に大阪府警察部の警察官となる「浪華隊」や「取締番卒」が居留地の警備を行っていた。