Samurai Warriors 3 - Kai's Story 4 - The Kasai-Osaki Uprising

This is a unique battle just to Kai. Now on the Toyotomi's side, this battle has you fight against peasants and a large number of not so subtle Date troops. Kai and Masamune pretty much equally chew each other out in this stage, for both their story modes. Nothing too difficult here, and you get quite a few reinforcements.