This application is the game of "scissors-paper-rock". It is well done in Japan, like the coin toss.
You can play the game ZYANKEN with one or two , and ACHI-MUITE-HOI , TENKATORI-ZYANKEN.
These games are the dear play to remember the time of the child in Japan.
The basic rule of ZYANKEN is following.
A victory or defeat is decided by the strength relation of the hand to have chosen as the 3rd.
The hand has (Goo) (Choki) (Pa). It is says "Zyan-Ken-Pon" or "Ai-Kode-Syo" when choosing a hand.
In "ATTI-MUITE-HOI", NYAN of the cat serves as the companion.
"TENKATORI-ZYANKEN" competes in the order with unique characters.