N-I
JPN Wikipedia 
Built & Operated By
Mitsubishi Heavy Industries
Commercial · founded 1884
Maiden Flight
9 SEP 1975
About
The N-I or N-1 was a derivative of the American Thor-Delta rocket, produced under licence in Japan. It used a Thor-ELT first stage, a Mitsubishi Heavy Industries-designed LE-3 engine was used as a second stage, and three Castor SRMs. Seven were launched between 1975 and 1982, before it was replaced by the N-II.
Vehicle Specifications
Height
34 m
Diameter
2.44 m
Launch Mass
131 T
Stages
2–3
Configuration
Expendable
Launch Record
Total Launches
7
Successful
6
Failed
1
Consecutive
2
Performance
To LEO
1,200 kg
To GTO
360 kg