Did Japan lose about a quarter of the aircraft sent against Pearl Harbor?
Short answerNo; the discussion totals 29 aircraft shot down plus about 20 constructive losses out of roughly 360 launched, or about fourteen percent.
NotesJapan did not lose roughly a quarter of the aircraft sent against Pearl Harbor. The discussion counts 29 aircraft shot down and another 20 constructive losses caused by battle damage and hard landings. Against approximately 360 aircraft launched from six carriers, that total is about fourteen percent. Aircraft destroyed in combat and aircraft written off after returning both reduced the carrier air groups available for later operations.