Hikyō na kōmori ("Cowardly Bat") is a card game of bluffing in which players try to piggy-back on other players' cards to score the most points.
All cards are dealt to the players. Each round players take turns playing a card on the table one by one and announce whether it is a Beast or a Bird. Cards may be played face up or face down, and players are free to lie about the card they have played. After each player has a card on the table, face-down cards are revealed and the outcome of the round is determined:
Play continues until players run out of cards. The player with the most points wins.