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Photo: Occitandu34 · Wikimedia Commons · Public domain
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N-II

Military Space Launch Vehicles · Japan · 1981
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N-II

N-II
N-II Photo: Occitandu34 · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Payload Capacity
45
Reliability
85
Cost-Efficiency
60
Responsiveness / Cadence
30
Reusability
10
Orbit Versatility
50
Precision
65
Technology
55
Strategic Value
40
Human-Rating
20
Origin Japan
CategoryMilitary Space Launch Vehicles
EraCold War
In service1981–1987
Operators1 countries
Quantity8
Data Quality83%
48
Military Space Launch Vehicles MASS Rating
22/96
Cold War
96/296
All-Time
Military Space Launch Vehicles · 10 axes scored
Payload Capacity
45
Reliability
85
Cost-Efficiency
60
Responsiveness / Cadence
30
Reusability
10
Orbit Versatility
50
Precision
65
Technology
55
Strategic Value
40
Human-Rating
20
ⓘ Regardless of era, the same scoring system applies to all units in the military space launch vehicles category.
01 / Overview
N-II
Country
Production
1981–1987
Quantity
8
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MILITARY SPACE LAUNCH VEHICLES · COLD WAR
22
PERFORMANCE/PRICE
65
UNIT COST (2025 USD)
—
48
military space launch vehicles category
ⓘ Performance/Price and MASS score are computed across all units in the military space launch vehicles category, regardless of era.
02 / Specs & Design
◎General6MOD.6
  • Vehicle TypeSpace launch vehicle
  • First Flight1981
  • ManufacturerMcDonnell Douglas (design); Mitsubishi Heavy Industries (production)
  • Stages2
  • StatusRetired
  • In ServiceNo
◈Performance7MOD.7
  • Payload to LEO2,000 kg
  • Payload to GTO730 kg
  • Liftoff Thrust2,848.6
  • Liftoff Mass132.69 t
  • Height35 m
  • Diameter2.44 m
  • Success Rate1
▣Propulsion5MOD.5
03 / History
SERVICE LIFESPANRetired
  1. 1981Production started
  2. 1987Entered service
45
years in service
6
years in production
8
units produced
0
countries operating
ⓘ The producing country no longer actively operates it. 1 countries retired it.
04 / Operators
Operator Countries1country
📚 Sources
📖 ENCYCLOPEDIA Browse the Military Space Launch Vehicles entry →