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University · Yokosuka · Japan

National Defense Academy of Japan

In research, National Defense Academy of Japan stands highest in Physical Sciences (#5,905 of 12,888 worldwide), Engineering (#4,356 of 6,636 worldwide) and Aerospace Engineering (#746 of 795 worldwide), 2022–2025. Relative to its size it is most specialised in Aerospace Engineering — Aerospace Engineering is 10.2× its share of world research.

mod.go.jp/ndaROR OpenAlex
World rank, 2022–2025
#10,976
of 28,054 · #3,497 all time
Rank in Japan
#272
of 1,070
Research works
5.4k
▼ 9% vs 2013–17
Citations
59k
10.8 per fractional work
Top-10% rate
7.2%
record average 16.5%
Open access
22%
world 28%

What is National Defense Academy of Japan known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #5,905 of 12,888 6.8%442 #2123
EngineeringField #4,356 of 6,636 7.0%231 #1297
Aerospace EngineeringSubfield #746 of 795 13.1%61 #583
Computer ScienceField #4,421 of 4,667 9.7%68 #3898

Each strip is that field’s whole ranked pool, with the notch where National Defense Academy of Japan sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022–2025. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Physical Sciences#2,123 #5,905
  2. Engineering#1,297 #4,356
  3. Aerospace Engineering#583 #746
  4. Computer Science#3,898 #4,421
all time2022–2025, better2022–2025, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

What does National Defense Academy of Japan specialise in?

Where its research is concentrated relative to its size: Aerospace Engineering takes 10.2× the share of its output that it takes of world research.

  1. Aerospace EngineeringSubfield · 60.7 works10×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.04× its world share, 1 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.26× its world share, 7 worksBiochemistry, Geneti…Immunology and Microbiology: 0.06× its world share, 0 worksImmunology and Micro…Neuroscience: 0.32× its world share, 3 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.05× its world share, 2 worksPharmacology, Toxico…Chemical Engineering: 6.59× its world share, 12 worksChemical EngineeringChemistry: 2.12× its world share, 17 worksChemistryComputer Science: 1.72× its world share, 68 worksComputer ScienceEarth and Planetary Sciences: 0.95× its world share, 8 worksEarth and Planetary …Energy: 0.15× its world share, 1 worksEnergyEngineering: 3.01× its world share, 231 worksEngineeringEnvironmental Science: 0.50× its world share, 13 worksEnvironmental ScienceMaterials Science: 2.79× its world share, 50 worksMaterials ScienceMathematics: 1.78× its world share, 11 worksMathematicsPhysics and Astronomy: 2.89× its world share, 33 worksPhysics and AstronomyDentistry: 0.18× its world share, 0 worksDentistryHealth Professions: 0.06× its world share, 1 worksHealth ProfessionsMedicine: 0.13× its world share, 13 worksMedicineNursing: 0.02× its world share, 0 worksNursingArts and Humanities: 0.12× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.10× its world share, 2 worksBusiness, Management…Decision Sciences: 0.53× its world share, 3 worksDecision SciencesEconomics, Econometrics and Finance: 0.33× its world share, 4 worksEconomics, Econometr…Psychology: 0.17× its world share, 3 worksPsychologySocial Sciences: 0.44× its world share, 29 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Chemical Engineering, 6.6×. Every wedge is a field page.

Who are the top researchers at National Defense Academy of Japan?

Ranked on the composite score, Kiyoshi Okazaki, Yoshikazu Nakamura and Hiroshi Satō lead among researchers whose main affiliation is National Defense Academy of Japan.

  1. 1 Kiyoshi Okazaki Japan · #143,426 worldwide 217 citations · 47 works
  2. 2 Yoshikazu Nakamura Japan · #183,546 worldwide 122 citations · 32 works
  3. 3 Hiroshi Satō Japan · #302,317 worldwide 599 citations · 150 works
  4. 4 Junjiro Kubo Japan · #312,038 worldwide 5 citations · 29 works
  5. 5 Nobuaki Takahashi Japan · #373,367 worldwide 212 citations · 95 works
  6. 6 Junya YAMAKAWA Japan · #382,236 worldwide 49 citations · 23 works
  7. 7 Kunihiro Nagata Japan · #419,703 worldwide 121 citations · 16 works
  8. 8 Hitoshi Matsumoto Japan · #420,116 worldwide 272 citations · 112 works
  9. 9 Tamotsu IGARASHI Japan · #434,718 worldwide 195 citations · 66 works
  10. 10 Tsuyoshi Yoshida Japan · #474,560 worldwide 46 citations · 33 works
All ranked researchers at National Defense Academy of Japan

Which keywords describe research at National Defense Academy of Japan?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Deep Learning, IoT Security, Numerical Simulation, Ionic Liquids, Wireless Communications, Machine Learning, Antenna and Microstrip.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Deep Learning38▲ 2.2×30 topics
  2. Machine Learning26▲ 1.58×27 topics
  3. IoT Security14▲ 8.3×3 topics
  4. Catalysis13▲ 3.7×18 topics
  5. Numerical Simulation13▲ 8.4×8 topics
  6. Ionic Liquids12▲ 8.4×6 topics
  7. Wireless Communications12▲ 13×2 topics
  8. Heat Transfer12▲ 4.7×11 topics
  9. Antenna10▲ 24×1 topic
  10. Microstrip10▲ 24×1 topic
  11. Green Chemistry10▲ 11×5 topics
  12. Collision Avoidance10▲ 10×4 topics
  13. Detection10▲ 6.3×4 topics
  14. Behavioral Analysis9▲ 15×2 topics
  15. Path Planning9▲ 14×3 topics
  16. Security Analysis9▲ 10×3 topics
  17. Anomaly Detection9▲ 5.8×3 topics
  18. Fluid-Structure Interaction8▲ 11×4 topics
  19. Autonomous Vehicles8▲ 7.8×4 topics
  20. CO2 Capture8▲ 10×4 topics
  21. Sustainable Technology8▲ 14×2 topics
  22. Electrochemistry8▲ 6.8×3 topics
  23. Frequency Selective Surfaces8▲ 22×1 topic
  24. Metasurfaces8▲ 22×1 topic
  25. Deep Eutectic Solvents8▲ 46×1 topic
  26. Solvents8▲ 46×1 topic
  27. Dynamic Analysis8▲ 12×2 topics
  28. Unmanned Aerial Vehicles7▲ 7.6×3 topics
  29. Multi-Agent Systems7▲ 7.3×3 topics
  30. Android Malware7▲ 16×1 topic
  31. Lab-on-a-Chip7▲ 11×4 topics
  32. Permission Analysis7▲ 16×1 topic
  33. Maxwell's Equations6▲ 44×2 topics
  34. Social Influence6▲ 5.7×3 topics
  35. Dynamic Behavior6▲ 10×2 topics
  36. Modernization6▲ 6.5×2 topics
  37. Intrusion Detection6▲ 8.0×1 topic
  38. Network Security6▲ 8.9×1 topic
  39. Signal Processing6▲ 8.5×3 topics
  40. International Trade Law5▲ 8.0×2 topics

Which research topics does National Defense Academy of Japan publish most on?

By volume in 2022–2025: Antenna Design and Analysis, Advanced Antenna and Metasurface Technologies, Ionic liquids properties and applications and Advanced Malware Detection Techniques.

Antenna Design and Analy…10Antenna Design and Analysis: 10 fractional worksAdvanced Antenna and Met…8Advanced Antenna and Metasurface Technologies: 8 fractional worksIonic liquids properties…8Ionic liquids properties and applications: 8 fractional worksAdvanced Malware Detecti…7Advanced Malware Detection Techniques: 7 fractional worksNetwork Security and Intrusion Detection: 6 fractional worksRobotic Path Planning Algorithms: 5 fractional worksMilitary Technology and …5Military Technology and Strategies: 5 fractional worksLinguistic, Cultural, and Literary Studies: 5 fractional worksLegal and Regulatory Analysis: 5 fractional worksHigh-Velocity Impact and…5High-Velocity Impact and Material Behavior: 5 fractional works
Aerospace EngineeringCatalysisSignal ProcessingComputer Networks and Communications4 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Antenna Design and Analysis Aerospace Engineering 10 works
  2. 2 Advanced Antenna and Metasurface Technologies Aerospace Engineering 8 works
  3. 3 Ionic liquids properties and applications Catalysis 8 works
  4. 4 Advanced Malware Detection Techniques Signal Processing 7 works
  5. 5 Network Security and Intrusion Detection Computer Networks and Communications 6 works
  6. 6 Robotic Path Planning Algorithms Computer Vision and Pattern Recognition 5 works
  7. 7 Military Technology and Strategies Aerospace Engineering 5 works
  8. 8 Linguistic, Cultural, and Literary Studies Sociology and Political Science 5 works
  9. 9 Legal and Regulatory Analysis Transportation 5 works
  10. 10 High-Velocity Impact and Material Behavior Materials Chemistry 5 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available21.9%not open78.1%

World: 28% of research is openly available.

with international co-authors11.4%domestic only88.6%

World: 19% is written across borders.

How has National Defense Academy of Japan's research output changed?

Output in 2018–2022 was 9% lower than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Yokosuka

All research institutions in Yokosuka

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.