When collecting all Kenpo, it takes plenty of time. You should look for generals (the old men who seem to have powerful attacks) and keep attacking them. Alos, break the Clan Rocks, which have a Dragon (Seiryu), Phoenix (Suzaku), Tiger (Byakko), Turtle (Genbu), and Kirin (yellow), to get as much Kenpo as possible.
First, stock up on 10x of each healing item (Holy, Recovery, Vita, and Refresh Drops, also Do, Ya, Ma and Madoya powders and some essences will not hurt) and 11 Soul Talismans. You can complete the game with just 8 if you trained correctly (15 in normal and 17 in hard), and used the downloaded items. You must use the Ginmei against the five Gods.
After each fight, you can swing your sword when there are no enemies. This works similar to the Chi Hack, but also allows you to make the last intermission sequence of Xui Yu where she destroys the last Kirin Chi Gate invisible if you have already have completed the game and have the Kirin Chi.
Charge up your Chi gauge to the maximum level. When you enter a battle, kill all the enemies except for one using sword attacks, then weaken the last one. Next, use the Chi attack to kill the weakened enemy. After you start the Chi attack, hold Square. Once the enemy is dead, you will begin to charge your Chi gauge, but will still be in Attack mode, even though there are no enemies. When the gauge is charged, tap Square(2), then hold it down again (requires precise timing). If done correctly, you will execute the Chi attack and begin charging up again. You will gain Chi experience for each Chi attack. Repeat this as many times as desired. Note - If the timing of the Square double tap is incorrect, you will exit Battle mode and be unable to attack with your Chi.
Earn the following Freestyle Scrolls by searching the corresponding locations:
FREESTYLE SCROLL - LOCATION Freestyle Scroll 1 - Given to you Freestyle Scroll 2 - In Suzaku by the inn. Freestyle Scroll 3 - In Chikuan at the end of the town to the left. Freestyle Scroll 4 - In Western Byakko to the right and under a bridge inside the first part of the town near the Blacksmith and curse remover.