Oicho-Kabu (おいちょかぶ) is a traditional Japanese card game that is similar to Baccarat. It is typically played with special kabufuda cards. A hanafuda deck can also be used, if the last two months are discarded. (Western playing cards can be used if the face cards are removed from the deck and aces are counted as one.) Oicho-Kabu means 8-9 and uses the Japanese kabufuda names for the numbers one to ten. As in baccarat, this game also has a dealer, who the players try to beat.
The goal of the game is to reach 9. As in baccarat, the last digit of any total over 10 makes your hand: a 15 counts as 5, a 12 as 2, and a 20 as 0. Having two of the same card makes it the card number: a 10 and a 10 = 10, 1 and a 1 = 1.
The nickname for the worst hand in oicho-kabu - an eight, a nine and a three - is phonetically expressed as "ya-ku-za" and is the origin of the Japanese word for "gangster," yakuza.