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Ōdachi: History & Applications
An ōdachi (大太刀, large/great sword) or nodachi (野太刀, field sword) is a type of traditionally made Japanese sword (日本刀, nihontō) used by the samurai class of feudal Japan. The Chinese equivalent of this type of sword in terms of weight and length is the miaodao or the earlier zhanmadao, and the Western battlefield equivalent (though less similar) is the…
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Ōdachi topic overview
The analysis highlights History and Applications as prominent areas in the source structure around Ōdachi.
Related topics
54
Source areas
6
Connected nodes
64
Extracted relationships
74
Concept neighborhoods
27
Bridge connections
64
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.
History · 22 topics
Overview · 11 topics
Etymology · 6 topics
Method of use · 6 topics
Notable ōdachi · 5 topics
Production · 4 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.
Blade length
approx. 90.9 cm (35.8 in) (3 shaku)–226.7 cm (89.3 in) (7 shaku, 5 sun)
Blade type
Curved, single-edged
Hilt type
Two-handed swept, with circular or squared guard. Material: wood, metal, ivory, fish skin, silk
Mass
2.2–14.5 kg (4.9–32.0 lb)
Place of origin
Japan
Produced
Kamakura period (1185－1333) to present
Explore all related topics Closing gaps
A structured outline of related entities, concepts and subtopics. Open any item to build a new map centered on it.
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.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
How Ōdachi connects Entity context
Entity context groups extracted connections by relationship type. Counts show recurrence in the analyzed source; the examples are research signals, not claims about importance.
The extracted context around Ōdachi shows recurring relationship patterns in the source. For example, Ōdachi → Around, August, Bishū, Bizen, It, Japan, Japanese, Kibitsu, Kibitsu Shrine, Niigata Prefecture, Nishikanbara District, Norimitsu, Norimitsu Osafune, Odachi Norimitsu, Oei Bizen, Okayama Prefecture, One, The, This, Yahiko Another extracted example is Ōdachi → As, Azuchi-Momoyama, Furthermore, However, In, Japan, Japanese, Kamakura, Large, Muromachi, Nanboku-chō, Sengoku, Sōshū, The, The Kamakura, Until. Use these groups to spot repeated connection types before inspecting the individual relationships.
Ōdachi → As, Azuchi-Momoyama, Furthermore, However, In, Japan, Japanese, Kamakura, Large, Muromachi, Nanboku-chō, Sengoku, Sōshū, The, The Kamakura, Until
related to Method of use· 15
Ōdachi → An, As, Enshin-ryū, Fumon Tanaka, Hayashizaki-ryū, Iaidō, Muromachi, One, Shin, The, The Kage-ryū, The Kōden Enshin-ryū, There, While, Yagyū Shinkage-ryū
related to Haja-no-Ontachi· 9
Ōdachi → Great Evil-Crushing Blade, Haja-no-Ontachi, Hanaoka Hachiman Shrine, In, It, Its, The, Treasure House, Yamaguchi
is a· 2
Ōdachi → Haja-no-Ontachi, Odachi Norimitsu
related to Production· 2
Ōdachi → Because, The
Blade length· 1
Ōdachi → approx. 90.9 cm (35.8 in) (3 shaku)–226.7 cm (89.3 in) (7 shaku, 5 sun)
Blade type· 1
Ōdachi → Curved, single-edged
Hilt type· 1
Ōdachi → Two-handed swept, with circular or squared guard. Material: wood, metal, ivory, fish skin, silk
Mass· 1
Ōdachi → 2.2–14.5 kg (4.9–32.0 lb)
Important terminology
Frequent words and multi-word phrases across the lead, headings, infobox and body. Useful for terminology coverage.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
Relationships are represented as Subject → Predicate → Object triples. Confidence describes extraction strength, not the real-world importance of a relationship; lower-confidence rows may be contextual rather than explicit.
TTTA extracted 74 structured relationships around Ōdachi. Examples in this analysis include Ōdachi → Blade length → approx. 90.9 cm (35.8 in) (3 shaku)–226.7 cm (89.3 in) (7 shaku, 5 sun) and Ōdachi → Blade type → Curved, single-edged. The table shows each extracted connection, where it came from and its confidence.
Subject
Predicate
Object
Confidence
Src
Ōdachi
Blade length
approx. 90.9 cm (35.8 in) (3 shaku)–226.7 cm (89.3 in) (7 shaku, 5 sun)
1.00
infobox
Ōdachi
Blade type
Curved, single-edged
1.00
infobox
Ōdachi
Hilt type
Two-handed swept, with circular or squared guard. Material: wood, metal, ivory, fish skin, silk
1.00
infobox
Ōdachi
Mass
2.2–14.5 kg (4.9–32.0 lb)
1.00
infobox
Ōdachi
Place of origin
Japan
1.00
infobox
Ōdachi
Produced
Kamakura period (1185－1333) to present
1.00
infobox
Ōdachi
Scabbard/sheath
Lacquered wood
1.00
infobox
Ōdachi
Type
Sword
1.00
infobox
Ōdachi
Used by
Samurai, kenjutsu, iaido practitioners
1.00
infobox
Ōdachi
is a
Odachi Norimitsu
0.90
text
Ōdachi
is a
Haja-no-Ontachi
0.90
text
ōdachi were at their peak
instance of
huge Japanese swords
0.80
text
No triples extracted yet.
Related concept clusters Concept neighborhoods
Concept neighborhoods group terms that sit near one another in the extracted graph. They are useful for discovering adjacent language and context, but proximity does not by itself imply a factual relationship.
The concept neighborhoods around Ōdachi bring nearby vocabulary together. In this analysis, examples include Period, Samurai and Use. Use the clusters to find adjacent concepts and terminology that may deserve separate research.
Ōdachi
Period
Samurai
Use
Used
Blade
Length
Cm
Swords
Japanese
Sword
Long
Back
ōdachi
Period
Samurai
Use
Used
Blade
Length
Cm
Swords
Japanese
Sword
Long
Back
japanese sword
Type
Japanese
Sword
Swords
Miaodao
Terms
Used
Blade
Chinese
Katana
Length
Nodachi
blade
Length
Shaku
Approx
Cm
Sun
Sword
Ōdachi
Used
Japanese
Chinese
Scabbard
Katana
notable ōdachi
Period
Samurai
Use
Used
Blade
Length
Cm
Swords
Japanese
Sword
Long
Back
samurai
Japan
Kamakura
Period
Ōdachi
Back
Type
Norimitsu
Use
Used
Length
Sword
Method
the village of yahiko, nishikanbara district, niigata prefecture, japan
Kamakura
Type
Samurai
Use
Used
Method
Period
Sword
Large
Nodachi
Approx
Norimitsu
chinese character
Zhanmadao
Weight
Miaodao
Terms
Used
Katana
Sword
Type
Long
Tachi
Also
Blade
Connections between topic areas Semantic bridges
Semantic bridges connect parts of the graph that would otherwise be more separate. A bridge is a structural signal in this analysis, not a claim that the two topic areas are equivalent.
For Ōdachi, one of the stronger structural bridges in this analysis connects Ōdachi with History. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.
Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.
Ōdachi
Nodes65
Edges64
Triples74
Avg. degree1.97
Density0.030769
Components1
Source & methodology
TTTA analyzes the structure around Ōdachi to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Applications, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.
