Early 2000 saw CZW establish a connection with the death match wrestling orientated company Big Japan Pro Wrestling, credited to have popularized the death match wrestling style that CZW continued to emphasize in the United States, dubbed as "Ultraviolence". Both promotions traded talent throughout 2000 and 2001, the company vs company feud was primarily based in Japan. The "CZW warriors" in BJW included Wifebeater, Nick Gage, Trent Acid, Justice Pain, Johnny Kashmere, Nate Hatred, Ruckus, Nick Berk, as well as John Zandig as the leader.[7]