Aoshi: Low Spin Kick
Press [Down], "Kick" + "Guard". Aoshi will do a spin low kick and send his opponent kissing the ground.

Kenshin: 360 Low Slash
Press [Forward], [Forward], "Punch" + "Kick". Kenshin will do a 360 degree Low Slash instead of the 360 Mid Slash.

Easy win
Set "Punch" and "Guard" to only one button, to increase the success rate. In battle, just press [Back] repeatedly, and when your opponent comes near, press the "Punch/Guard" button. Repeat as needed.

Zanza's sword
Hold [Select] when choosing Zanza on the character select screen. Zanza's Zanbato sword will be available for use.

Fight as Kaoru
Successfully complete the game in story mode or vs. computer mode to choose Kaoru as one of the fighters.

Fight as Saito Hajime
Successfully complete the game on the hard difficulty setting to play as Saito Hajime. You will also be able to view all the FMV sequences in the game.