IWGP U-30 Openweight Championship

Statistics
First champion(s)	Hiroshi Tanahashi
Final champion(s)	Hiroshi Tanahashi
Most reigns	Hiroshi Tanahashi (2 reigns)
Longest reign	Hiroshi Tanahashi (First reign, 622 days)
Shortest reign	Shinsuke Nakamura (117 days)
Oldest champion	Hiroshi Tanahashi (26 years, 5 months and 10 days)
Youngest champion	Shinsuke Nakamura (24 years, 10 months and 11 days)

IWGP U-30 Openweight Championship
IWGP U-30 Openweight Championship
Details
Promotion	New Japan Pro-Wrestling
Date established	April 23, 2003
Date retired	June 7, 2006
Other name(s)
	U-30 Openweight Championship; (2003–2004)
First champion(s)
Statistics
First champion(s)	Hiroshi Tanahashi
Final champion(s)	Hiroshi Tanahashi
Most reigns	Hiroshi Tanahashi (2 reigns)
Longest reign	Hiroshi Tanahashi (First reign, 622 days)
Shortest reign	Shinsuke Nakamura (117 days)
Oldest champion	Hiroshi Tanahashi (26 years, 5 months and 10 days)
Youngest champion	Shinsuke Nakamura (24 years, 10 months and 11 days)

The IWGP U-30 Openweight Championship (IWGP U-30無差別級王座, IWGP Andā Sātī Musabetsu-kyū Ōza) 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.

Only two champions between three reigns were ever crowned over its three year existence, the inaugural and two time champion Hiroshi Tanahashi, and Shinsuke Nakamura.

As his 30th birthday began to approach (which would then make him ineligible to be the champion), Tanahashi vacated the title on June 7, 2006, to focus on the IWGP Heavyweight Championship, and soon afterwards the U-30 Openweight Championship was de-emphasized and soon deactivated.