Yari-Tori (遣り取り, lit. ‘give and take’) is a quick gambling game played with the 6 “dead cards” set aside during the deal in Tensho. It is a game for 2 players, and is closely related to the game Tokotoko.
¶ Setup
First, prepare the deck as you would for Tensho or Hon-Bana by removing the 3 Chaff of 
Paulownia, leaving a deck of 45 cards.
As a side-game to Tensho, the 6 “dead cards” set aside during the deal will be used for a 2-player game of Yari-Tori at the conclusion of the round. Then, 3 cards are dealt to each player.
¶ Gameplay
Once both players have looked at their hands, players come to an agreement as to how much money to bet; all players must put up the same amount before the game can progress.
Once all players have put up the appropriate amount of money, each player then chooses any 1 of the 3 cards in their hand that they want to exchange to the other player, and then the players exchange cards, and proceed to the showdown.
The winner is the player whose hand has the highest value in the ones digit when the 3 card values are summed. That player earns all the money that was wagered. In the case of a tie, the pot may be split evenly among the winners.
Note that the card values follow the Nagoya suit order used in such games as Hiyoko and Isuri. For instance, 
Pine cards have a value of 1, while the Phoenix counts as a 6, and 
Peony cards each count as 11. Only the suit order matters, not any other characteristics of the card.
¶ Bibliography
- Tobaku Ni Kansuru Chōsa. vol. 121, Shihōshō Chōsaka, 1927, National Diet Library, dl.ndl.go.jp/info:ndljp/pid/1269696. pp. 68-69.