The 91st Emperor's Cup (第91回天皇杯) was a regular edition of an annual Japanese national cup tournament. It started on 3 September 2011 and ended on 1 January 2012 with the final at National Stadium in Tokyo, Japan, won by FC Tokyo 4–2 against Kyoto Sanga.

The cup winner were guaranteed a place in the 2012 AFC Champions League.

(*1)a total number of four games were postponed to 7 or 14 September due to tropical storm.
(*2)a total number of eight games were postponed to 12 October due to event clashes of quarterfinals of 2011 J.League Cup, and November 9 was reserved for Cerezo Osaka and Hokkaido University of Education Iwamizawa Campus in case of event clashes if Cerezo entered the 2011 AFC Champions League semi-finals (but game was not postponed as Cerezo was eliminated in quarter-finals).
(*3)Kashiwa Reysol's game was postponed to 21 December due to the participation in 2011 FIFA Club World Cup.

※Clubs that occupied two top places at the end of the 17th round (11th week) of 2011 Japan Football League.

All matches are Japan Standard Time (UTC+09:00)

Due to Tropical Storm Talas (Japanese: 台風12号, 2011 Japanese Typhoon 12), four matches were postponed.

Note: The original schedule was 3 September 13:00 but postponed due to tropical storm.

Note: The original schedule was 3 September 15:00 but postponed due to tropical storm.