How do you get 5Th weapons in samurai warriors 2 empires?

In Samurai Warriors 2: Empires, to obtain 5th weapons, you need to complete specific conditions for each character. This typically involves achieving a certain level of proficiency with the character, completing their individual missions, and often winning specific battles or scenariOS. Additionally, you may need to unlock and fulfill criteria related to the character's story or relationships. Once these conditions are met, you can find the weapon in the designated mission or area.