Koi-koi

Koi-koi (, lit. "come on" or "bring it"), originally known as Hanafuda (), is a card-based gambling game featured as a recurring minigame in the Like a Dragon series. It was first introduced in Ryu Ga Gotoku Kenzan!.
== Gameplay ==
A game between two people played with a hanafuda deck. At the start of a game, one of two cards is chosen by the players, and the one whose card has a lower month value is given the "dealer" role. The "dealer" is the player who goes first in each round. The round's month depends on which round it is; for example, round 2's month is month 2.
A hanafuda deck is split into 12 suits, sorted by month, with 4 cards each. Each card itself has a point value. There are twenty-four 1-point "junk" cards, ten 5-point "ribbon" cards, nine 10-point "variety" cards, and five 20-point "light" cards. The sake cup card, which is a part of the Month 9/Chrysanthemum suit, can be counted as a 1-point card depending on the ruleset. The cards' point values are factors into what hand can be made, not the player's score.
At the start of a game, 8 cards are dealt to each player and 8 cards are placed on the board. Each player must place a card from their side onto the board. If the card a player placed matches the suit of a cards on the board, the player is allowed to claim both their card and the board card. If there are two cards with a matching suit on the board, the player must choose one of the two. If there are three cards from the same suit, they are laid into a pile and whichever player has the last card of the suit is allowed to claim all four. If there are no matching cards, the card is simply placed on the board. Once the player has placed their card, the topmost card of the deck is flipped over and placed on the board. If the suit of the flipped card matches the suit of a card on the board, the player claims both those cards. The earlier conditions apply if there is more than one card of a suit on the board. After the card from the deck is flipped and placed, the player's turn ends. There is no way to take a card from the opposing player's side once it is claimed. On a players side, the claimed cards are organized into piles according to their point value, with the one-point cards on the left and the 20-point cards on the right.
The objective of the game is to gain points by forming hands. Once a hand has been formed in a round, the player who formed the hand can choose to end the round, or call koi to continue. If no hands are made by either player, the other player is made the dealer. This also occurs when a player has called koi but no hands are made by either player afterward. In this case, the player who called koi also forfeits the points they would have gained from the hands they made that round. If a hand is formed with the player's last card, the round ends automatically. If the player who formed the most recent hand chooses to end the round, they have the points made from their hand(s) added to their score, and the other player receives no points. In certain rulesets, if a player has earned at least 7 score from one round, their round score is doubled before being added to their cumulative score.
The selected difficulty affects the maximum amount of wooden tags that can be bet per round by the players. Higher difficulties are unlocked once enough rounds of the game have been played.
=== Hands ===
Name 	Cards 	Points
Five Lights (, Gokō) 	All five "light" cards. 	10
Four Lights (, Shikō) 	Four "light" cards, excluding the Rain Man. 	8
Rainy Four Lights (, Ame-shikō) 	Three "light" cards and the Rain Man. 	7
Three Lights (, Sankō) 	Three "light" cards, excluding the Rain Man. 	6
Red Poetry Ribbons (, Akatan) 	All three red ribbon cards with writing on them. 	5
Blue Poetry Ribbons (, Aotan) 	All three blue ribbon cards. 	5
Cherry Blossom Viewing1 (, Hanami-zake)	Sake Cup and Month 3/Cherry Blossom "light" card. 	5
Moon Viewing1 (, Tsukimi-zake) 	Sake Cup and Month 8/Susuki Grass "light" card. 	5
Season (, Shun) 	All four cards of the current round's suit. 	4
Variety (, Tane) 	Any five "variety" cards.One additional point per extra "variety" card.	1
Poetry Ribbons (, Tan) 	Any five "ribbon" cards.One additional point per extra "ribbon" card. 	1
Junk (, Kasu) 	Any ten "junk" cards.One additional point per extra "junk" card. 	1
1 - This hand can be disabled in settings. Available in Yakuza 5, Yakuza Kiwami, Yakuza Kiwami 2, and Yakuza: Like a Dragon.
== Cheat items ==
* Lucky Hanafuda Card - In the first round, the cards the player flips will match at least one card on the board if possible.
** Available in Yakuza 5, Yakuza Kiwami, and Yakuza Kiwami 2.
== Gallery ==
Category:Ryu Ga Gotoku Kenzan! Minigames
Category:Yakuza 3 Minigames
Category:Yakuza 4 Minigames
Category:Yakuza 5 Minigames
Category:Ryu Ga Gotoku Ishin! Minigames
Category:Yakuza 0 Minigames
Category:Yakuza Kiwami Minigames
Category:Yakuza Kiwami 2 Minigames
Category:Judgment Minigames
Category:Yakuza: Like a Dragon Minigames
Category:Lost Judgment Minigames
Category:Like a Dragon: Ishin! Minigames