Here are photos from a 28mm Imjin War Game using my Sengoku house rules between samurai and the Royal Korean Army:
I ran a 28mm Japanese samurai game against Don Cox's Koreans. And I got hammered by musket fire. In fact, Korean firepower and missile weapons made the difference in this game. My troops got whittled down so much, they had no sustaining power when they got into melee with the Koreans. So I chalked it up to another Korean victory as I continue tinkering with these house rules.