Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

H3 (rocket): Art, Development & Overview

The H3 is a Japanese medium-lift launch vehicle developed by JAXA and Mitsubishi Heavy Industries (MHI). A hydrolox-fuelled rocket, it is the successor to the H-IIA and H-IIB launch vehicles. The H3 uses the LE-9 main engine, which was designed to be less expensive to produce as part of a broader effort to lower launch costs. The rocket has a modular…

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

H3 (rocket) topic overview

The analysis highlights Art, Development and Overview as prominent areas in the source structure around H3 (rocket).

Related topics
40
Source areas
5
Connected nodes
45
Extracted relationships
64
Concept neighborhoods
20
Bridge connections
45

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 15 topics
Development · 14 topics
Variants · 5 topics
Vehicle description · 4 topics
Future upgrades · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Altitude
420 km (260 mi) · 500 km (310 mi)
Based on
H-IIA · H-IIB
Burn time
110 seconds · 300 or 225 seconds · 699 seconds
Carries passengers or cargo
ALOS-4 · HTV-X · IGS · QZSS
Comparable
Ariane 6 · Atlas V · Falcon 9 · Long March 7 8 12 · 7
Cost per launch
H3‑30: ¥5 billion (2023) (equivalent to ¥5.13 billion or US$33.92 million in 2024)

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Development

Vehicle description

Variants

Future upgrades

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How H3 (rocket) connects Entity context

The extracted context around H3 (rocket) shows recurring relationship patterns in the source. For example, H3 (rocket) → 12, 7, 8, Ariane 6, Atlas V, Falcon 9, Long March 7 8 12, LVM3, Soyuz-2, Vulcan Centaur Another extracted example is H3 (rocket) → H3‑22: 420 t (930,000 lb), H3‑24: 16,000 kg (35,000 lb), H3‑24: 575 t (1,268,000 lb), H3‑24: 7,900 kg (17,400 lb), H3‑30: 271 t (597,000 lb), H3‑30: 4,000 kg (8,800 lb). Use these groups to spot repeated connection types before inspecting the individual relationships.

H3 (rocket)

Top relations

Comparable · 10
H3 (rocket) → 12, 7, 8, Ariane 6, Atlas V, Falcon 9, Long March 7 8 12, LVM3, Soyuz-2, Vulcan Centaur
Mass · 6
H3 (rocket) → H3‑22: 420 t (930,000 lb), H3‑24: 16,000 kg (35,000 lb), H3‑24: 575 t (1,268,000 lb), H3‑24: 7,900 kg (17,400 lb), H3‑30: 271 t (597,000 lb), H3‑30: 4,000 kg (8,800 lb)
Height · 5
H3 (rocket) → 12 m (39 ft), 15 m (49 ft), 37 m (121 ft), With L or W fairing: 63 m (207 ft), With S fairing: 57 m (187 ft)
Carries passengers or cargo · 4
H3 (rocket) → ALOS-4, HTV-X, IGS, QZSS
Burn time · 3
H3 (rocket) → 110 seconds, 300 or 225 seconds, 699 seconds
Gross mass · 3
H3 (rocket) → 241 t (531,000 lb), 28 t (62,000 lb), 76.2 t (168,000 lb) each
Maximum thrust · 3
H3 (rocket) → 137 kN (31,000 lbf), 2,300 kN (520,000 lbf) each, 2,942 or 4,413 kN (661,000 or 992,000 lbf)
Propellant mass · 3
H3 (rocket) → 226 t (498,000 lb), 24.6 t (54,000 lb), 67.2 t (148,000 lb) each
Specific impulse · 3
H3 (rocket) → 283.6 s (2.781 km/s), 425 s (4.17 km/s), 448 s (4.39 km/s)
Altitude · 2
H3 (rocket) → 420 km (260 mi), 500 km (310 mi)

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

h3 launch le-9 first vehicle engine flight rocket used jaxa engines second stage boosters launches mhi 000 lb development planned

H3 (rocket) relationships Subject–Predicate–Object triples

TTTA extracted 64 structured relationships around H3 (rocket). Examples in this analysis include H3 (rocket) → Altitude → 420 km (260 mi) and H3 (rocket) → Altitude → 500 km (310 mi). The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
H3 (rocket)Altitude420 km (260 mi)1.00infobox
H3 (rocket)Altitude500 km (310 mi)1.00infobox
H3 (rocket)Based onH-IIA · H-IIB1.00infobox
H3 (rocket)Burn time110 seconds1.00infobox
H3 (rocket)Burn time300 or 225 seconds1.00infobox
H3 (rocket)Burn time699 seconds1.00infobox
H3 (rocket)Carries passengers or cargoALOS-41.00infobox
H3 (rocket)Carries passengers or cargoHTV-X1.00infobox
H3 (rocket)Carries passengers or cargoIGS1.00infobox
H3 (rocket)Carries passengers or cargoQZSS1.00infobox
H3 (rocket)ComparableAriane 61.00infobox
H3 (rocket)ComparableAtlas V1.00infobox
H3 (rocket)ComparableFalcon 91.00infobox
H3 (rocket)ComparableLong March 7 8 121.00infobox
H3 (rocket)Comparable71.00infobox
H3 (rocket)Comparable81.00infobox
H3 (rocket)Comparable121.00infobox
H3 (rocket)ComparableLVM31.00infobox
H3 (rocket)ComparableSoyuz-21.00infobox
H3 (rocket)ComparableVulcan Centaur1.00infobox
H3 (rocket)Cost per launchH3‑30: ¥5 billion (2023) (equivalent to ¥5.13 billion or US$33.92 million in 2024)1.00infobox
H3 (rocket)Country of originJapan1.00infobox
H3 (rocket)Diameter5.27 m (17.3 ft)1.00infobox
H3 (rocket)Diameter2.5 m (8 ft 2 in)1.00infobox
H3 (rocket)Failure21.00infobox
H3 (rocket)First flight7 March 20231.00infobox
H3 (rocket)FunctionMedium-lift launch vehicle1.00infobox
H3 (rocket)Gross mass76.2 t (168,000 lb) each1.00infobox
H3 (rocket)Gross mass241 t (531,000 lb)1.00infobox
H3 (rocket)Gross mass28 t (62,000 lb)1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around H3 (rocket) bring nearby vocabulary together. In this analysis, examples include Solid, Boosters and Four. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • H3 (rocket)
    • Solid
    • Boosters
    • Four
    • Srb-3
    • Launch
    • Mhi
    • Second
    • Configuration
    • Designed
    • Planned
    • Engines
    • Jaxa
  • h3 (rocket)
    • Solid
    • Boosters
    • Four
    • Srb-3
    • Launch
    • Two
    • Stage
    • Mhi
    • Three
    • Used
    • Engines
    • Second
  • medium-lift launch vehicle
    • Launch
    • Vehicle
    • Flight
    • Planned
    • First
    • Boosters
    • Heavy
    • Fairing
    • Lb
    • Mhi
    • Engines
    • Jaxa
  • solid rocket boosters
    • Solid
    • Srb-3
    • Boosters
    • Rocket
    • Four
    • Two
    • Engines
    • First
    • Stage
    • Heavy
    • Three
    • Le-9
  • vehicle description
    • Launch
    • Flight
    • Heavy
    • First
    • Fairing
    • Lb
    • Boosters
    • Mhi
    • Engines
    • Jaxa
    • Le-9
    • Htv-x
  • le-9
    • Engines
    • Three
    • Two
    • First
    • Four
    • Solid
    • Boosters
    • Rocket
    • Stage
    • Srb-3
    • Development
    • Fairing
  • mitsubishi heavy industries
    • Boosters
    • Mhi
    • Vehicle
    • Htv-x
    • Le-5b-3
    • H-iia
    • Configuration
    • Development
    • Fairing
    • Launches
    • Lb
    • Planned
  • h-iia
    • Lb
    • Engines
    • Htv-x
    • Le-5b-3
    • Heavy
    • Less
    • Designed
    • Development
    • Fairing
    • Launches
    • Orbit
    • Planned

Connections between topic areas Semantic bridges

For H3 (rocket), one of the stronger structural bridges in this analysis connects H3 (rocket) with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
H3 (rocket) — Overview · splits 30 ⟂ 16
H3 (rocket) — Development · splits 31 ⟂ 15
H3 (rocket) — Variants · splits 40 ⟂ 6
H3 (rocket) — Vehicle description · splits 41 ⟂ 5
H3 (rocket) — Future upgrades · splits 43 ⟂ 3

Map overview Semantic statistics

H3 (rocket)

Nodes46
Edges45
Triples64
Avg. degree1.96
Density0.043478
Components1

Source & methodology

TTTA analyzes the structure around H3 (rocket) to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Art, Development & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — H3 (rocket) · EN edition · Analysis: TopicsToTalkAbout

For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.