The Imperial Japanese Navy Aviation Bureau (海軍航空本部 , Kaigun Kōkū Hombu ) of the Ministry of the Navy of Japan was responsible for the development and training of the Imperial Japanese Navy Air Service. In 1941 it was headed by Vice-Admiral Katagiri and was organized as follows: Using only the above description and what you know about the world, "The Imperial Japanese Navy Air Service was not headed by Vice-Admiral Katagiri in 1941. " is definitely correct, incorrect, or inconclusive? 