NJPW's Aaron Wolf successfully defended a 10 million yen prize by defeating six grappling challengers in a single event. The challenge consisted of consecutive four-minute matches, testing Wolf's endurance and technical skill against a series of opponents.

Rule modifications were introduced after the third round, allowing joint locks in the final three matches. This added a new dimension to the competition, increasing the risk and intensity as Wolf continued to fend off each challenger.

Wolf emerged victorious after overcoming all six opponents, maintaining control throughout the series and securing the substantial monetary prize.

Sources: https://www.wrestlinginc.com/2146220/njpw-aaron-wolf-beats-six-challengers-legitimate-10-million-yen-challenge/