The IWGP U-30 Openweight Championship was a professional wrestling openweight championship in New Japan Pro-Wrestling for younger wrestlers who were under the age of 30. It was proposed as part of a tournament called the G2 U-30 Climax by Hiroshi Tanahashi, who ended up winning the tournament in April 2003. The U-30 Openweight Championship became officially recognized as an IWGP title in November 2004.

Hiroshi Tanahashi is a Japanese professional wrestler, sports executive and podcaster. He is signed to New Japan Pro-Wrestling (NJPW), where he serves as the president and representative director of the promotion, and is also an active wrestler, being one-third of the NEVER Openweight 6-Man Tag Team Champions alongside Toru Yano and Oleg Boltin.