Secret Number


  • Category: Arithmetic, Card game
  • Playing Time: 10 - 30 min.
  • Number of Players: 2 - 5
  • Designer: Yusuke Sato
  • Illustrator: Kyu Takai
  • Brand: New Board Game Party

Out of stock



For transport reasons, reservations are not accepted,
Please purchase at Japon Brand booth during SPIEL Essen 2023.
[Booth Number 4H120]

Target Audience

General gamers. People who like logical reasoning.


  • The newest card game from the author of “Time Bomb” or “Tempel des Schreckens”.
  • Players each add, subtract, multiply or divide the numbers on the 2 cards dealt to them and show the partial result of the calculation as a clue.
  • These clues are used to deduce each other’s hands in order to guess the “secret number” on an undealt card.


  • The game is played over 3 rounds, and additional clues are provided each round. The earlier the round one guesses the number correctly, the higher the score.
  • There is also a way to give clues that can earn you additional points as an element to facilitate a tactical gameplay in addition to deduction.

Additional information

  • The clues to deduce one’s hands, and eventually the “secret number”, are indicated by placing different types of cards on top of each other.