The Japanese military did not even think of the possibility of their codes being deciphered, so they believed their secrets were still intact. At that time Japan was Asia number one and they felt they would always be winning. 殺山本最大功勞是日本飛行員,因為日本參謀知道前線有多少架P38, 回航的日本飛行員報大數領功,反正不可能證實,上頭誤以為美國空中戰力微不足道,所以山本公然上前線鼓舞士氣,不誠實的隊友比豬還可怕。