N-I
The N-I or N-1 was a derivative of the American Thor-Delta rocket, produced under license in Japan. The N stood for "Nippon" (Japan). It used a Long Tank Thor first stage, a Mitsubishi Heavy Industries-designed LE-3 engine on the second stage, and three Castor SRMs.
Missions: 7
Successes: 6
Partial Failures: 0
Failures: 1
Success Streak: 2
Success Rate: 85.7%