Until the 1630s, it’s not impossible for that group to exist; that part is fine (though I should also fact-check the katana part since, for a long time, it was bows and maybe even guns by that point).
A well made katana is still going to be a status symbol. They might still keep it for keepsake and for reminding them of home that they cannot return to. And if you have marshal prowess why not be a mercenary? And if you’re in foreign land and they are already using firearms, you have to adapt.
Until the 1630s, it’s not impossible for that group to exist; that part is fine (though I should also fact-check the katana part since, for a long time, it was bows and maybe even guns by that point).
A well made katana is still going to be a status symbol. They might still keep it for keepsake and for reminding them of home that they cannot return to. And if you have marshal prowess why not be a mercenary? And if you’re in foreign land and they are already using firearms, you have to adapt.
It sounds plausible to me at least.
Portugese firearms were introduced to Japan in 1543 and Samurai used them.
You could have a Samurai with his katana and his heirloom matchlock rifle… in theory.