Impossible to know for sure but effective use of musketry by the Japanese made a huge impression on Korean and Ming soldiers during the Imjin Wars in Korea. Dedicated musketeer units were formed in both countries (although Ming most likely already possessed some musketeers even before the war), however Japanese muskets were works of art, well made by master sword blacksmiths and well appreciated. China and Korea tried to imitate the Japanese use of muskets but corruption ensured that most muskets were useless on the battlefield as they were not well maintained nor constantly practiced with. The worse thing for a soldier is to have an unreliable weapon.