how can i acquire the fourth weapon of katsuie shibata from the ps2 game

[scarllette118]

"samurai warriors 2: xtreme legends"? i've already acquired the fifth weapon. i'm still having a problem acquiring the fourth weapon of katsuie shibata from the ps2 game "samurai warriors 2: xtreme legends". i've already tried 8 times but to no avail. i'm getting annoyed by the game, please help. thank you.