Kemari is a traditional Japanese sport that has been played since the Heian period (794-1185). It is a form of football (soccer) that is played with a small, round ball called a mari. The game is played on a flat field with two teams
From Wikipedia
Kemari (蹴鞠) is an athletic football game that was popular during the Heian (794–1185) and Kamakura (1185–1333) periods of Japan. It resembles a game of keepie uppie or hacky sack.