Super Junior in 2011

From February 18 to February 20, 2011, Super Junior held their third Asia tour concert Super Show 3 at the Yokohama Arena in Japan. The ticket applicants for Super Show 3 Japan exceeded 110,000, while 36,000 people came to watch their performance.The Super Junior Japan 'Super Show 3' Opening Commemorative Album was released on February 16 ranked in at number two on Japan's Tower Records online sales charts. Super Junior Japan Limited Special Edition - Super Show 3 that contained a DVD ranked in second place and the CD was in 10th place. The album also remained at number three spot on the Oricon Daily Chart for two consecutive days and number six on Oricon Weekly Chart.

On February 24, Super Junior released a 3D movie from their third Asia tour, Super Show 3 3D in all CGV and Primus movie theaters. Super Show 3 3D was ranked sixth in box office weekly chart and became the most watched 3D movie in Korea.

On August 21, 2011, S.M. Entertainment announced that member Heechul will be enlisting to the army on September 1, 2011. On August 26, 2011, a music video for the album's supporting single, "Superman", was revealed via S.M. Entertainment's SMTOWN YouTube page, in which the music video shows various clips from their Super Show 3 tours as well as the photoshoots and music video making for "Mr. Simple". Super Junior also attended the SMTOWN Live in Tokyo Special Edition along with their SM labelmates at the Tokyo Dome on September 2nd, 3rd and 4th. Leeteuk said that the Tokyo Dome has been his long-time dream concert place and that he is very thankful he and Super Junior performed on the said venue before his army enlistment in which he indicated it to be sometime next year.

SM Entertainment announced on September 5, 2011 that Super Show 4 will commence on November 19th and 20th in Seoul and December 10th and 11th at the Kyocera Dome Osaka in Osaka, Japan. On September 19, 2011, Super Junior released a repackaged version of Mr. Simple entitled A-Cha, which comprises all thirteen tracks from Mr. Simple's B-version plus four new material — "A-Cha", "Oops!!" which features labelmate f(x), "A Day" and "Andante". On September 20th, it was announced via the group's official Japanese website that they will release their second Japanese single which is a Japanese version of their new album title track "Mr. Simple", and is slated for a December 7th release in Japan. In addition, a "Super Show 3 in Japan" DVD will be released on November 16th in Japan.