In Nioh 2 you can use Ochoko Cups to summon Benevolent Graves (blue graves that call for an AI partner to help you out) and to call for a player controlled character at Shrines.
In New Game+ Ochoko Cups can be redeemed to increase the drop rate of Divine Gear (the highest level green rarity gear).
To get Ochoko Cups all you need to do is interact with Red Graves (Bloody Graves) and defeat the Revenant that spawns from it.
Some will drop only a single Ochoko Cup and others can drop five at once. It depends on how strong the Revenant is, i.e. what level it is.
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