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J-I Launch Vehicle

J-I was a Japanese three-stage all-solid launch vehicle assembled from existing systems for rapid, lower-cost small-satellite launch development. It combined the H-II solid rocket booster developed by NASDA with upper-stage technology from ISAS's M-3SII; only the first vehicle flew before further development was suspended.

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Identity

Aliases
J-1J IJ-Iロケット
Family Name
J-I
Full Name
J-I Launch Vehicle
Status
retired
Type
rocket

Details

Description
J-I was a Japanese three-stage all-solid launch vehicle assembled from existing systems for rapid, lower-cost small-satellite launch development. It combined the H-II solid rocket booster developed by NASDA with upper-stage technology from ISAS's M-3SII; only the first vehicle flew before further development was suspended.
Dimensions
Diameter
…
Height
…
First Flight Year
1,996
Last Flight Year
1,996
Rocket Specs
Liftoff Mass
…
Payload Capacity
LEO
…
Reusability
expendable
Stages Count
3

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Creation Time
July 13, 2026 at 12:23:38 UTC
Updated Time
July 13, 2026 at 12:23:38 UTC