百 ひゃく人 にん一 いっ首 しゅ

hyakunin'isshu

1. (Ogura) Hyakunin Isshu; classical Japanese anthology of one hundred Japanese waka by one hundred poets — explanation

2. hyakunin isshu karuta; hyakunin isshu poetry cards; deck of 200 cards, the 100 waka of the Hyakunin Isshu split between them, to be matched together during the game — explanation