During the Muromachi period, there was a gambling game called Tocha (tea competition), where participants were made to guess the tea brand and place of production developed from the game Tosui (water competition).
室町時代においては、飲んだ水の産地を当てる闘水という遊戯から、闘茶という、飲んだ茶の銘柄を当てる一種の博打が流行した。