Just read a book, “Midway” Here’s a number for you... The japs were producing 160 planes a month at in Dec 41, after years of gearing up for war. In 1943 we produced 10,000 planes!!!!.... EVERY MONTH!!!!!!!!!!!!!1
And they couldn’t train pilots fast enough either. That is the reason the carrier Zuikaku wasn’t available for Midway - they had the planes to re-constitute her air group (heavy losses at the Battle of the Coral Sea and during South Pacific raids)but didn’t have the bodies to put in the planes.