Over time, I’ve read much of the literature pertaining to the Japanese decision to initiate hostilities against the United States by launching a preemptive strike against the American fleet (and facilities) at Pearl Harbor. I believe that one factor that contributed to the tactical success of the Japanese attack was the failure of American intelligence to focus on the ‘capabilities’ of the Japanese, particularly their ability to conduct multi- carrier operations. Here’s my question: Has anyone seen a comprehensive study of the information available to US intelligence prior to December 1941 which should have indicated that the advances made in Japanese tactics, techniques, and procedures increased the capabilities of the Kido Butai to the level that brought strike aircraft within attack range of Pearl Harbor on 7 Dec 1941? I’ve read a few “Oh, by the way”, comments to the effect that the Navy didn’t believe that the Japanese planes- nor their pilots- were very good, etc. but I’ve wondered if there exists any real pre-war analysis that gives a clear picture of what the US, particularly the US Navy, believed about the capabilities of the Imperial Japanese Navy, especially in the capabilities of naval aviation, and the information that supported this perception? NOTE: I’m basically familiar with MAGIC, the 14 part message, etc. No need to go that direction.