Pro Wrestling Zero1 (Japanese: プロレスリングZERO1, Hepburn: Puroresuringu Zerowan, stylized as PRO WRESTLING ZERO1), often referred to simply as Zero1 and sometimes referred to as Pro Wrestling Zero1 Catch as Catch Can (stylized as ZERO1 and PRO WRESTLING ZERO1 CATCH AS CATCH CAN, respectively), is a Japanese professional wrestling promotion founded in 2001.
Formerly known as Pro Wrestling Zero-One and Pro Wrestling Zero1-Max (stylized as Pro Wrestling ZERO-ONE and Pro Wrestling Zero1-MAX, respectively), it was affiliated with the National Wrestling Alliance (NWA) from 2001 until late 2004, and briefly reaffiliated in 2011. It was also affiliated with AWA Superstars of Wrestling (AWA) from 2005 until late 2007, the Global Professional Wrestling Alliance (GPWA) from 2006 to 2009, and has been affiliated with the United Wrestling Network (UWN) since 2017.