officially mentioned on May 5, 2022, when Mayu Iwatani became the second wrestler in the company to achieve the feat, after Io Shirai. List of World Wonder Ring Stardom Grand Slam winners Explosive Pro Wrestling (2018) In Explosive Pro Wrestling (EPW), the Grand Slam consists of the EPW Heavyweight Championship, the EPW Tag Team Championship, the EPW Coastal Championship and the EPW Hardcore Championship. List of Explosive Pro Wrestling Grand Slam winners References Professional wrestling slang Professional wrestling accomplishments