During the game, you will be able to purchase various items. On this page of the NiOh 2 guide, you will learn what Kodama Bazaar is and how to access it.
You can access Kodama Bazaar from a shrine. Then, on the "sacrifice" tab, you will find the option to go to this place. You will see a list of all available items for purchase.
Each available item has a specific price. For the Kodama Bazaar, the currency is unlocked shrines. Due to the fact that each level has a limited number of them, you will make purchases relatively rarely. For example, one potion will cost you four shrines. In main missions, you can find only three shrines.
Because of the limited resources, it is best to leave these purchases as a last resort for situations where you can't handle a certain sequence.