Attack Power is one of the main parameters describing the main character. In this section of the guide to Sekiro: Shadows Die Twice we inform you how you can increase this parameter to cause more damage to enemies.
To develop the attack power, you need to fight with the main bosses of the game. The first enemy of this kind is General Giubo Aniwa, who fights on a horse, and whom you will meet at the finishing stages of the Ashina Castle Grounds.
After destroying the final boss, you will receive a message about removing the Memory associated with this boss - an example in the attached screen.
Get to any Sculptor's Idol and select the Enhance Attack Power.
Confirm the willingness to confront the memory of the boss fight. You will receive confirmation of an increase (by 1 point) in attack power.