The below chapter provides a complete walkthrough for The Unrepentant Thief. It provides a solution to the challenges in the side quest of the game, which will allow you to complete it in the best possible way.
Braided Straw Kabuto
Smithing text: Sacred Bush
Water Amulet x3
In this mission, your task is to find incense. You are accompanied by the samurai from the house of Lord Ieasu. To find it, you have to defeat Kappa. However, before you reach him, you will have to defeat many other opponents, such as soldiers, archers, yokai, one-eyes and flaming wheels. Right after you leave the cave, it is a good idea to go to the ship. On the upper deck, there are skeletons guarding cannons. To find Kappa unbothered, you have to kill skeletons, for the cannons to be immobilized. After you have defeated the opponents and killed Kappa, the mission will end.