Head to head

H-IIA vs Proton-M Briz-M

Two vehicles in the same payload class. Every figure below comes from the same two sources for both rockets, and a row appears only when both publish the input.

Payload to low Earth orbit

Relative

H-IIA: 10,000 kg

Proton-M Briz-M: 21,000 kg

Side by side

9 comparable figures

The highlighted value wins the row. Rows where neither direction is better, like length or stage count, highlight nothing.

Metric	H-IIA	Proton-M Briz-M
Flights flown	50	68
Success rate	98%	91.2%
Payload to LEO (kg)	10,000	21,000
Payload to GTO (kg)	4,100	4,500
Liftoff thrust (kN)	2,260	10,000
Length (m)	53	53
Diameter (m)	4	7.4
Launch mass (t)	285	712
Stages	2	4

H-IIA

Flight record

98% success rate49 of 50 flown · 1 failed

2001peak 2017 · 6 flights2025

Maiden flight 2001-08-29. Retired.

Proton-M Briz-M

Flight record

91.2% success rate62 of 68 flown · 6 failed

2001peak 2013 · 9 flights2023

Maiden flight 2001-04-07. Still flying.

H-IIA is built by Mitsubishi Heavy Industries of Japan (company profile on Space Index).Proton-M Briz-M is built by Khrunichev State Research and Production Space Center of Russia (company profile on Space Index).

Full specifications and the complete launch history for each: H-IIA · Proton-M Briz-M.

Specifications from Launch Library 2 by The Space Devs, launch records from Space Index. Derived figures are computed here; see sources and method.