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Model: LE-5. Gross Mass: 10,600 kg (23,300 lb). Empty Mass: 1,800 kg (3,900 lb). Thrust (vac): 102.900 kN (23,133 lbf). Isp: 450 sec. Burn time: 370 sec. Propellants: Lox/LH2. Isp(sl): 0 sec. Diameter: 2.49 m (8.16 ft). Span: 2.49 m (8.16 ft). Length: 10.32 m (33.85 ft). Country: Japan. No Engines: 1. Motor: LE-5. Status: Retired 1992. Cost $ : 30.000 million. First Flight: 1986. Last Flight: 1992. No Launched: 13. Other designations: LE-5.

Model: LE-5EC. Gross Mass: 16,700 kg (36,800 lb). Empty Mass: 2,700 kg (5,900 lb). Thrust (vac): 121.500 kN (27,314 lbf). Isp: 452 sec. Burn time: 600 sec. Propellants: Lox/LH2. Diameter: 4.00 m (13.10 ft). Span: 4.00 m (13.10 ft). Length: 10.60 m (34.70 ft). Country: Japan. No Engines: 1. Motor: LE-5A. Status: Retired 1999. Cost $ : 30.000 million. First Flight: 1994. Last Flight: 1999. No Launched: 12. Other designations: LE-5EC.

Model: LE-5B. Gross Mass: 19,600 kg (43,200 lb). Empty Mass: 3,000 kg (6,600 lb). Thrust (vac): 137.000 kN (30,798 lbf). Isp: 447 sec. Burn time: 534 sec. Propellants: Lox/LH2. Diameter: 4.00 m (13.10 ft). Span: 4.00 m (13.10 ft). Length: 9.20 m (30.10 ft). Country: Japan. No Engines: 1. Motor: LE-5B. Status: In production. First Flight: 2001. Last Flight: 2007. No Launched: 24.

Lower cost version of H-2 second stage.

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