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.

H3 ロケットは日本の使い捨て打ち上げシステム。各構成は 2 桁の数字と 1 文字で特徴を表す。1 桁目は第 1 段の LE-9 エンジン数 (2 または 3)、2 桁目は機体下部に付ける固体ロケットブースター SRB-3 の本数 (0、2、4) で、固体ブースターの配置はすべて対称。末尾の文字はフェアリング長 (S = ショート、L = ロング)。例えば H3-24L はエンジン 2 基・固体ブースター 4 本・ロングフェアリング、H3-30S はエンジン 3 基・固体ブースターなし・ショートフェアリングとなる。

Wikipedia

Info

H3-22

Launch success.

Spacecraft separation.

Refined launch window.

Delayed to NET August 10 UTC due to launch site weather.

Rescheduled for NET August 9 UTC.

Delayed due to launch site weather (effects of Typhoon Dolphin).

NET August 6 UTC.

Delayed to TBD due to previous H3 launch failure.

GO for launch.

NET 2025.

H3 launches navigation satellite

Space Force delivers second U.S. payload to be hosted on Japanese satellite

YouTube

YouTube (Short)

2026.8.11　3:30～ H３ロケット9号機 「みちびき7号機」打上げ　H3 Rocket F9 QZS-7 Launch

QZSS (Quasi Zenith Satellite System) is a Japanese satellite navigation system operating from inclined, elliptical geosynchronous orbits to achieve optimal high-elevation visibility in urban canyons and mountainous areas. The navigation system objective is to broadcast GPS-interoperable and augmentation signals as well as original Japanese (QZSS) signals from a three-spacecraft constellation.

The navigation system objective is to broadcast GPS-interoperable and augmentation signals as well as original Japanese (QZSS) signals from a three-spacecraft constellation in inclined, elliptical geosynchronous orbits.

QZS-5 to 7 Patch

みちびき7号(QZS-7)

H3-22 | みちびき7号(QZS-7)

Launch failure.

Official Webcast by JAXA | 宇宙航空研究開発機構 has started

Rescheduled for December 22.

Scrubbed for the day.

Tweaked T-0.

Tweaked launch window.

Rescheduled for December 17.

Launch delayed due to problems with the Inertial Measurement Unit (IMU) on the H3 2nd stage, new launch date TBD.

Tweaked approximate launch date per launch manifest (P.129 of source).

H3 rocket suffers upper stage anomaly, fails to correctly deploy navigation satellite

Japan’s H3 suffers second-stage anomaly, QZS-5 satellite lost

みちびき5号(QZS-5)

H3-22 | みちびき5号(QZS-5)

Delayed to February 2 due to launch site weather.

Launch planned NLT Q1 2025.

Rocket Report: A blue mood at Blue; Stoke Space fires a short over the bow

Japan launches Michibiki 6 navigation satellite with fifth H3 rocket

みちびき6号(QZS-6)

H3-22S | みちびき6号(QZS-6)

Launch success with satellite solar panels deployed and in proper attitude control.

Delayed to July 1st due to launch site weather.

NET June 2024; launch vehicle variant TBD.

Japan's H3 Rocket Successfully Launches ALOS-4

H3 Launches ALOS-4 Earth Observation Satellite

H3 launches ALOS-4 advanced Earth observation satellite

先進レーダ衛星「だいち4号」（ALOS-4）／H3ロケット3号機打上げライブ中継

Advanced Land Observing Satellite-4 (ALOS-4)

H3-22S | Advanced Land Observing Satellite-4 (ALOS-4)

JAXA | Advanced Land Observing Satellite-3 “DAICHI-3” (ALOS-3)

Apparent failure at 2nd stage ignition;FTS initiated.

Webcast live

24 hours slip due to weather.

March 6 new launch date confirmed by JAXA.

NET March 6 per local news reports and air-space closure notices.

NET early March

Launch aborted post main engine ignition due to 1st stage problem; roll back to VAB required.

hold at engine ignition

Webcast started

2 days slip due to weather.

February 15 launch date confirmed.

Delayed to NET February 15. Launch window TBC.

1 day slip due to one day slip of the previous H-IIA launch that flew today

Launch window confirmed.

NET February 12, 2023

Japan delays H2A launch in the wake of H3 failure

H3 failure could delay Japanese science missions

After nearly a decade in development, Japan’s new rocket fails in debut

Japan’s H3 rocket launch fails after second stage malfunction

Japan’s flagship H3 rocket fails on first test flight

Japan's H3 Rocket Fails During Inaugural Launch

Japan’s maiden launch of H3 rocket fails during second stage flight

Japan’s new H3 rocket ready for another launch attempt after last-second abort

Japan aborts H3 launch moments before liftoff

First launch of Japan’s H3 rocket aborted moments before liftoff

Launch of the First H3 Launch Vehicle with Advanced Land Observing Satellite-3 “DAICHI-3” onboard

H3ロケット試験機1号機／先進光学衛星「だいち3号」（ALOS-3）打上げライブ中継

ALOS-3 (Maiden flight)

H3-22S | ALOS-3 (Maiden flight)

Added launch.

H3 to launch next ispace lunar lander mission

ispace Mission 3 will be the first mission to feature ispace’s new ULTRA lunar lander, a larger and more capable lander design than the HAKUTO-R that attempted to land on the Moon twice before. 

The lander will carry payloads for Science Tokyo, TASA, ispace, UEL, JALUX and Magna Petra Corp.

ispace Mission 3 ULTRA

H3-22 | ispace Mission 3 ULTRA

状態	運用中
製造元	三菱重工
系列	H3
国	Japan
種別	Commercial
初飛行	2023年3月7日
全長	63 m
直径	5.3 m
打ち上げ質量	-
離昇推力	7,542 kN
段数	2 段
補助ブースター	2 本
LEO 投入能力	4 kg
GTO 投入能力	5,400 kg
GEO 投入能力	-
SSO 投入能力	-
フェアリング直径	5.3 m
フェアリング高さ	10.3 m
到達高度	-
再使用	使い捨て
最短再飛行間隔	90日 1時間 42分
打ち上げ価格	50,000,000 USD
バリアント	22

H3-22

通算成績

諸元

解説

関連リンク

打ち上げ予定・履歴

打ち上げ予定

打ち上げ履歴