The first matches to qualify for the Emperor\'s cup begin anywhere from April to August of that year, and varies year to year. For the 97th Emperor\'s Cup (2017), the games were played from 22 April 2017 and ended with the final on 1 January 2018. The knockout phase of the competition begins towards the end of the year. This phase is composed of all teams from J1 League (J1) and J2, the winners from each of the 47 prefectural championships (consist of amateur teams ranging from J3 League to college teams), and 1 organizer-nominated team among all amateur teams (this was assigned to the collegiate champion until 2011).
J1 teams, and sometimes J2 team(s) also receive bye(s) in the knockout phase. In 2016, all J1 teams and the previous year\'s J2 champions received a bye, and AFC Champions League participants received 3 byes. In 2017, all J1 and J2 teams received a bye. However, they lose home advantage starting from the third round, unless they are facing a higher-tier or higher ranked team.
From 1965 to 1971, the top 4 JSL clubs at the end of the season qualified for the Cup and the other four spaces allotted were taken by finalists from universities. From 1972 to 1995, as the League increased in size, the entire top division teams were entered automatically, while the second tier\'s member clubs participated in regional stages with other clubs. Beginning in 1996, the second-tier clubs (at the time, the old Japan Football League) began to be admitted automatically instead of having to play regional stages, which in turn became prefectural stages.
Before 2008, 48 teams took part in the first two rounds – the winner from each of the 47 prefectural championships and the collegiate champion. The top team in the JFL standings and all thirteen J2 teams joined in the third round. Finally, the eighteen J1 teams joined in the fourth round, making a total of 80 participating teams.