Rocket family · JAXA

H series

Also known as H-I, H-II, H3

Rockets

Overview

Japan's family of liquid-hydrogen launch vehicles — the H-I, H-II, H-IIA/H-IIB, and the current H3 — developed by JAXA and Mitsubishi Heavy Industries.

Vehicles in this family

Vehicle	Country	First flight	Lift class	LEO payload	Status
H-II	Japan	1994	Medium-lift	—	Retired
H-IIA	Japan	2001	Medium-lift	—	Retired
H3	Japan	2023	Medium-lift	—	Active

Knowledge connections

Operated byJAXA (Japan Aerospace Exploration Agency)
Family includesH-II
Family includesH-IIA
Family includesH3

Sources

The primary and reference sources this topic draws on.

JAXAJapan Aerospace Exploration Agency
Japanese missions (Hayabusa, Akatsuki) and space science.