H-IIA recovers from its 2003 failure
Japan's previous flagship rocket, the H-IIA, failed on its sixth flight in November 2003 when a booster would not separate, destroying two spy satellites. JAXA grounded the rocket for more than a year to investigate.
The H-IIA returned to flight in February 2005 after design changes.
It then flew dozens of missions with a strong success rate before retiring in 2025, becoming Japan's reliable workhorse.
The H-IIA shows a rocket can recover from an early failure and become dependable. JAXA is trying to repeat that path with the H3.
