The Natsu Onna Kettei Tournament (夏女決定トーナメント, Natsu Onna Kettei Tōnamento) was an annual professional wrestling tournament promoted by the JWP Joshi Puroresu promotion between 2009 and 2012. The name of the tournament was Japanese for "Summer Woman Determination Tournament" and as the name suggests, it was held during the summer. The tournament was contested in a single-elimination format, however, uniquely, every other tournament was for singles wrestlers and every other for tag teams of two wrestlers. Throughout the years, the tournament featured several outside participants, most notably from the Ice Ribbon promotion, with which JWP co-produced the . Kaori Yoneyama is the only wrestler to have won the tournament twice; once as a singles wrestler and once teaming with Command Bolshoi.