The year 2011 is the 4th year in the history of Jewels, a mixed martial arts promotion based in Japan.
Jewels 12th Ring[1] was a cancelled event that would have been held on March 11, 2011 at Shinjuku Face in Tokyo, Japan.
Jewels 15th Ring[12] was an event held on July 9, 2011 at Shinjuku Face in Tokyo, Japan.
Jewels 16th Ring[13] was an event held on September 11, 2011 at Shin-Kiba 1st Ring in Tokyo, Japan.
Jewels 17th Ring[17] was an event held on December 17, 2011 at Shinjuku Face in Tokyo, Japan.