Jewels 15th Ring was a mixed martial arts (MMA) event held by promotion Jewels on July 9, 2011 at Shinjuku Face in Kabukicho, Tokyo, Japan.

Valkyrie , sometimes styled VALKYRIE in capitals, was a women's mixed martial arts (MMA) promotion. It was the sister of Japanese MMA promotion Cage Force, both operated by Greatest Common Multiple (GCM) Communication. Contrary to other Japanese women MMA promotions at the time, it featured a cage instead of a ring and used the same venues as Cage Force.