Hanafuda Koikoi is a cherished traditional Japanese card game that has captivated players for generations. This is the English version of Hanafuda Koi-Koi.

Koi-Koi (Japanese: こいこい) is a widely enjoyed card game in Japan, utilizing Hanafuda cards. It represents one of the engaging ways to play Hanafuda, Japan's unique set of playing cards, designed for two players.

The primary objective of the game is to swiftly form combinations of several cards before your opponent. The term "koi-koi," which translates to "come on" in Japanese, is enthusiastically exclaimed by a player who chooses to continue the hand in hopes of scoring more points.

The essence of the game lies in creating special card combinations known as "yaku" from cards gathered in a point pile. Players accumulate cards in their point piles by matching cards from their hands or those drawn from the draw pile with cards displayed on the table. Upon forming a yaku, a player faces a strategic decision: they can either halt the game to claim the points earned or opt to continue playing (referred to as "koi-koi," giving the game its name) to attempt forming additional yaku for a higher score. While the point values of individual cards do not directly impact the score, they are crucial in assessing their importance in constructing yaku.