Koto Battle: Tengai no Moribito is a card battle game. You play as a training kotodama card battler. A long time ago, the ki element kotodama wreaked havoc on the world. Five other kotodama elements joined forces to seal it away. They then spread throughout the world, and left protecting the land to the miko, who used the ten element kotodama. The player is the younger brother of one of these miko, and aspires to become a moribito, who are a group of battlers who protect the miko.
You must travel throughout the land battling wild monsters and other battlers in kotodama card battles. In battle, there are four options: “Use kotodamas,” “Kotodama history,” “Defend,” and “Escape.” Types of cards include monster cards, item cards, and magic cards.