Japanese engineers read foreign journals, followed international debates, and bought prototypes when opportunities arose. British, American, French, and German designers participated in the same circulation of ideas. Engineers could adopt a promising concept, reject another, or adapt it to their own requirements and manufacturing practice. The A5M belongs to that international technical conversation while remaining a domestically developed Japanese fighter. Similarity alone is poor evidence that one country simply copied another's aircraft.
Notable Point · 35:29-36:23
International aviation exchange was not simple copying
Shared journals, conferences, prototypes, and foreign ideas informed every major aviation industry while Japanese engineers still developed their own solutions.