If you Google “middle age drawing” or ask a person to describe them, few will mention guns. Most will picture knights, prince was and swords, but the collective imagination of Middle Ages doesn’t include guns.
Same with samurai’s. Ask someone to cosplay, describe or draw a samurai and very few would include a gun
It has been noted before, that what people associate with a time period is not always close to what the period was actually like. I can recommend this thread by u/sirophiuchus and this one by u/ConteCorvo