Rock Paper Scissor Poker (じゃんけんポーカー) is a game in the Kakegurui manga played in the tournament during the Election and supervised by the real Kurara Kurokura. The eight participants are Yumeko Jabami, Mary Saotome, Midari Ikishima, Yuriko Nishinotouin, Yumemi Yumemite, Erimi Mushibami, Miyo Inbami, and Ibara Obami.
The game is played with a deck of 63 cards - 21 each of rock, paper, and scissors. Each player receives five cards and is given a discard round. Players then put a card on the table - the "head card". After a betting round, there is the showdown. The rules are the same as a normal rock, paper, scissors game. In case of a tie, however, the game is switched to poker mode: whoever has more cards matching their head card wins. There are five rounds, but during each one players have to pay a mandatory participation fee that is doubled every turn. In turn one, the minimum bet is 10 votes, then in turn two 20 votes and so on.
Round OneYumeko Jabami played against Erimi Mushibami in the first match. With a hand of five scissors, Yumeko won.
The second match was played by Midari Ikishima and Yuriko Nishinotouin. Midari won with the same hand as Yumeko.
The third round was played by Mary Saotome against Yumemi Yumemite. After struggling because of Yumemi's raises and being forced to fold, Mary won by playing scissors against Yumemi's paper.
Finally, Ibara Obami played against Miyo Inbami in the final match. During the game, Miyo commented that she didn't want to kill anyone from her family. Later, she revealed that she had already "sprinkled her poison" on him. Ibara looked shocked and ended up losing the game.
Yumeko played against Midari. Midari cheated however by picking out cards from her discarded pile. Yumeko figured that out and deliberately cheated and won against her.