Jewels 12th Ring was a planned mixed martial arts (MMA) to be held by MMA promotion Jewels.

Miller's fight with Yamanaka was later announced for Jewels 11th Ring on December 17, 2010, but was officially cancelled again on December 6.

On November 16, 2008, Akano submitted Mika Harigai with an armbar in just 38 seconds at Jewels 1st Ring.

Akano faced Hiroko Yamanaka for the second time at Jewels 7th Ring on March 19, 2010.

Akano then faced Roxanne Modafferi in a bout rescheduled for Jewels 15th Ring on July 9, 2011.

Jewels 5th Ring was a mixed martial arts (MMA) event held by MMA promotion Jewels.

The semi-final and final will take place at Jewels 17th Ring.

Jewels 4th Ring was a mixed martial arts (MMA) event hosted by promotion Jewels.

Ham was slated to compete at Jewels 10th Ring, but since she decided to participate in two kickboxing matches with conflicting dates, Jewels released her.

The location and date originally planned for Jewels 14th Ring will be used for Jewels 15th Ring.