he did not recall any ship sending a radio message before the attack. Furthermore, Captain Kijiro, in charge of the Kido Butais three screening submarines, stated nothing of interest happened on the way to Hawaii, presumably including signals received from the supposedly radio silent . Vice Admiral Ryūnosuke Kusaka stated, "It is needless to say that the strictest radio silence was ordered to be maintained in every ship of the Task Force. To keep radio silence was easy to say, but not so easy to maintain." There is nothing in the Japanese logs or after action report indicating that radio silence was broken until after the attack. Kusaka worried about this when it was briefly broken on the way home. The appendix to the war-initiating operational order is also often debated. The message of 25 November 1941 from CinC Combined Fleet (Yamamoto) to All Flagships stated, "Ships of the Combined Fleet will observe radio communications procedure as follows: 1. Except in extreme emergency the Main Force and its attached force will cease communicating. 2. Other forces are at the discretion of their respective commanders. 3. Supply ships, repair ships, hospital ships, etc., will report directly to parties concerned." Furthermore, "In accordance with this Imperial Operational Order, the CinC of the Combined Fleet issued his operational order ... The Task Force then drew up its own operational order, which was given for the first time to the whole force at Hitokappu Bay... In paragraph four of the appendix to that document, the especially secret Strike Force was specifically directed to 'maintain strict radio silence from the time of their departure from the Inland Sea. Their communications will be handled entirely on the general broadcast communications net.'" In addition, Genda recalled, in a 1947 interview, Kido Butais communications officer issuing this order, with the task force to rely (as might be expected) on flag and blinker. Radio deception measures The Japanese practiced radio deception. Susumu Ishiguru, intelligence and communications officer for Carrier Division Two, stated, "Every day false communications emanated from Kyushu at the same time and same wavelength as during the training period." Because of this, Commander Joseph Rochefort of Hawaii Signals Intelligence concluded that the First Air Fleet remained in home waters for routine training. The ships left their own regular wireless operators behind to carry on "routine" radio traffic. Captain Sadatoshi Tomioka stated, "The main force in the Inland