Pro Wrestling Secret Base (プロレスリングSECRET BASE), (also プロレスリング シークレットベース (Puroresuringu Shīkuretto Bēsu)) (Secret Base), is a Japanese professional wrestling promotion that, until 2009, was known as El Dorado Wrestling.
They run, on average, one show every month and feature their own talent as well as participation from other promotions as Freedoms and Big Japan Pro Wrestling. Some of their talent frequently appears elsewhere.
References
Secret Base Wikipedia(Text) CC BY-SA