What is "koi-koi"

is a popular card game in Japan played with Hanafuda cards. The phrase "koi-koi" means "come on" in Japanese which is said when the player wants to continue the hand.

The object of the game is to form special card combinations called "yaku" from cards accumulated in a point pile. Players can gain cards in their point piles by matching cards in their hands, or drawn from the draw pile, with cards on the table. Once a yaku has been made, a player can stop to cash in points, or keep going (referred to as "koi-koi", hence the name of the game) to KOI KOI