Training order "B" issued by Governor of Hyogo Prefecture on 6 June 1944 on training districts, training, fire fighting and operations. Report No. 7zz, USSBS Index Section 2

Hyogo Prefecture air-defense Order No. 570 on matters pertaining to the use of sirens for the transmission of security warning and all-clear signals (Japanese). Report No. 7hhh, USSBS Index Section 2