The J-I rocket, which was developed during the 1990s but abandoned after just one launch, used a similar design concept, with an H-II booster and Mu-3S-II upper stages.

[22] The root cause was determined to be the "melting and scattering of a metal part from the ignition device", which damaged the propellant and insulation.

The maiden flight, carrying the SPRINT-A scientific satellite, lifted off at 05:00 UTC (14:00 JST) on 14 September 2013.

A ground-based computer had tried to receive data from the launch vehicle 0.07 seconds before the information was actually transmitted.

[9] Sources: Japanese Cabinet[48] In November 2012, JAXA reported that there had been a possible leak of rocket data due to a computer virus.