The Japanese game of karuta (a corruption of the word "carta" "card" in Portuguese) is a memory game where you flip cards which are divided in pairs, each one of the pair contains half of a Waka, a poem, contained in the Hyakunin Isshu (One Hundred Poems, a watermark collection of 100 most well known Heyan poets)
The cards are memorized, and flipped over again. Then, someone reads a waka, and players have to remember where the cards are and protect their half or whack the opponent's card to flip it over and claim them.
The US translated version was thus named.
