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Rocket file · LV-204

H3-24

Mitsubishi Heavy Industries · H3 · IN SERVICE

H3-24 is an expendable launch vehicle built by Mitsubishi Heavy Industries. It stands 63.0 m tall, first flew on 26 October 2025. It has flown 2 times with 2 successes, a success rate of 100.0%. Its next flight is H3-24 | HTV-X2 for Mitsubishi Heavy Industries, no earlier than 2027.

Specification

Vehicle spec sheet

ON FILE
Height63.0 m
Diameter5.3 m
Payload to LEONOT ON FILE
Payload to GTO7,900 kg
Maiden flight26 October 2025
ReusableNo, expendable
Launch cost$50M
StatusIN SERVICE

As listed by Launch Library 2. The cost is Launch Library’s figure, not a quoted price. Figures for rockets outside the sixty most-flown were last read on 2026-11-05.

Flight record

Reliability

ON RECORD
Total flights2
Successful2
Failed0
Success rate100.0%
Landing attempts0
Landing successN/A
Scheduled4
Variant24

About H3-24

The H3 Launch Vehicle is a Japanese expendable launch system. Each H3 booster configuration has a two-digit and a letter designation that indicates the features of that configuration. The first digit represents the number of LE-9 engines on the main stage, either "2" or "3". The second digit indicates the number of SRB-3 solid rocket boosters attached to the base of the rocket, and can be "0", "2" or "4". All layouts of solid boosters are symmetrical. The letter in the end shows the length of the payload fairing, either short "S" or long "L". For example, an H3-24L has two engines, four solid rocket boosters, and a long fairing, whereas an H3-30S has three engines, no solid rocket boosters, and a short fairing.

Upcoming flights

H3-24 in the archive

From NASA's public image library and Wikimedia Commons. Each photo shows the credit its licence asks for and links back to where it came from.

The new HTV-X1 approaches the International Space Station
The new HTV-X1 approaches the International Space StationNASA / JSC · public domainNASA ↗
Mechanism imatinib-arabic text
Mechanism imatinib-arabic textOriginal uploader was Sodium at en.wikipedia Later versions were uploaded by Jfdwolff at en.wikipedia . · CC BY-SA 3.0Wikimedia Commons ↗
H3 on East End Road. - geograph.org.uk - 990919
H3 on East End Road. - geograph.org.uk - 990919Martin Addison · CC BY-SA 2.0Wikimedia Commons ↗

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Common questions

How many times has H3-24 flown?
2 times, with 2 successes and 0 failures. Another 4 flights are scheduled.
What is H3-24's success rate?
100.0%. That's 2 successful flights out of 2 attempts.
When is the next H3-24 launch?
H3-24 | HTV-X2, flown by Mitsubishi Heavy Industries. It's set for no earlier than 2027 from Yoshinobu Launch Complex LP-2.
How much can H3-24 lift to orbit?
Launch Library 2 lists H3-24 at no figure to low Earth orbit and 7,900 kg to geostationary transfer orbit.
Is H3-24 reusable?
No. Launch Library 2 lists H3-24 as expendable, so no stage is recovered to fly again.