On August 1, 2003, Punk joined the Japanese promotion Pro Wrestling ZERO-ONE for the final day of their 2003 Fire Festival at Korakuen Hall. At the event, Punk teamed with C.W. Anderson, Josh Daniels, and Vansack Acid in losing effort against the team of Ikuto Hidaka, Jun Kasai, Naohiro Hoshikawa, and Tatsuhito Takaiwa.