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University · Nagaoka · Japan

Nagaoka University

In research, Nagaoka University stands highest in Physical Sciences (#10,442 of 12,888 worldwide) and Engineering (#6,100 of 6,636 worldwide), 2022–2025. Relative to its size it is most specialised in Electrical and Electronic Engineering — Electrical and Electronic Engineering is 4.3× its share of world research.

nagaokauniv.ac.jpROR OpenAlex
World rank, 2022–2025
#19,995
of 28,054 · #7,190 all time
Rank in Japan
#578
of 1,070
Research works
4.1k
▼ 17% vs 2013–17
Citations
31k
7.6 per fractional work
Top-10% rate
3.5%
record average 16.5%
Open access
50%
world 28%

What is Nagaoka University 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 #10,442 of 12,888 2.5%224 #4392
EngineeringField #6,100 of 6,636 2.3%141 #2979

Each strip is that field’s whole ranked pool, with the notch where Nagaoka University 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).

What does Nagaoka University specialise in?

Where its research is concentrated relative to its size: Electrical and Electronic Engineering takes 4.3× the share of its output that it takes of world research.

  1. Electrical and Electronic EngineeringSubfield · 44.5 works4.3×
← 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: 0.41× its world share, 6 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.51× its world share, 8 worksBiochemistry, Geneti…Neuroscience: 1.10× its world share, 5 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.43× its world share, 0 worksPharmacology, Toxico…Chemical Engineering: 1.56× its world share, 2 worksChemical EngineeringChemistry: 0.82× its world share, 4 worksChemistryComputer Science: 0.82× its world share, 18 worksComputer ScienceEarth and Planetary Sciences: 0.46× its world share, 2 worksEarth and Planetary …Energy: 1.16× its world share, 3 worksEnergyEngineering: 3.24× its world share, 141 worksEngineeringEnvironmental Science: 0.92× its world share, 13 worksEnvironmental ScienceMaterials Science: 2.72× its world share, 28 worksMaterials ScienceMathematics: 0.17× its world share, 1 worksMathematicsPhysics and Astronomy: 1.88× its world share, 12 worksPhysics and AstronomyDentistry: 0.24× its world share, 0 worksDentistryHealth Professions: 0.51× its world share, 4 worksHealth ProfessionsMedicine: 0.27× its world share, 15 worksMedicineNursing: 0.50× its world share, 1 worksNursingVeterinary: 0.28× its world share, 0 worksVeterinaryArts and Humanities: 0.21× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.39× its world share, 4 worksBusiness, Management…Decision Sciences: 0.62× its world share, 2 worksDecision SciencesEconomics, Econometrics and Finance: 0.61× its world share, 4 worksEconomics, Econometr…Psychology: 0.59× its world share, 5 worksPsychologySocial Sciences: 0.31× its world share, 11 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Engineering, 3.2×. Every wedge is a field page.

Who are the top researchers at Nagaoka University?

Ranked on the composite score, Masakazu Okazaki, Tetsuya Kimura and Masataka SHIRAKASHI lead among researchers whose main affiliation is Nagaoka University.

  1. 1 Masakazu Okazaki Japan · #754,190 worldwide 4 citations · 50 works
  2. 2 Tetsuya Kimura Japan · #1,115,787 worldwide 31 citations · 53 works
  3. 3 Masataka SHIRAKASHI Japan · #1,332,058 worldwide 20 citations · 51 works
  4. 4 Masao Matsui Japan · #1,469,273 worldwide 11 citations · 18 works
  5. 5 Matsuo Miyagawa Japan · #1,590,420 worldwide 5 citations · 21 works
  6. 6 Masaru Hattori Japan · #1,595,045 worldwide 2 citations · 16 works
  7. 7 Kouhei Noda Japan · #1,612,165 worldwide 0 citations · 21 works
All ranked researchers at Nagaoka University

Which keywords describe research at Nagaoka University?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Power Electronics, Renewable Energy Integration, Electric Vehicle Charging, DC-DC Converters, High-Frequency Power Conversion, Model Predictive Control, Fault Tolerance and Biomedical Applications.

▲ 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. Power Electronics22▲ 22×8 topics
  2. Renewable Energy Integration18▲ 18×4 topics
  3. Biomedical Applications10▲ 2.9×26 topics
  4. Electric Vehicle Charging10▲ 40×2 topics
  5. Nanoparticles8▲ 2.1×23 topics
  6. DC-DC Converters7▲ 42×1 topic
  7. High-Frequency Power Conversion7▲ 42×1 topic
  8. Model Predictive Control7▲ 9.2×4 topics
  9. Fault Tolerance7▲ 14×3 topics
  10. Mechanical Properties6▲ 2.2×22 topics
  11. Multilevel Converters6▲ 38×1 topic
  12. Voltage Source Inverters6▲ 38×1 topic
  13. Energy Efficiency6▲ 2.1×14 topics
  14. Finite Element Method6▲ 21×6 topics
  15. Additive Manufacturing6▲ 6.2×5 topics
  16. Nanocomposites6▲ 2.4×16 topics
  17. Thermal Analysis6▲ 15×5 topics
  18. Numerical Simulation5▲ 6.2×9 topics
  19. Adaptive Control5▲ 13×5 topics
  20. Thermal Management5▲ 5.3×5 topics
  21. Wireless Power Transfer5▲ 17×2 topics
  22. Energy Storage Systems4▲ 11×2 topics
  23. Efficiency Optimization4▲ 31×2 topics
  24. Failure Analysis4▲ 15×6 topics
  25. Decentralized Control4▲ 12×2 topics
  26. Material Properties4▲ 15×2 topics
  27. Polymer Composites4▲ 5.3×6 topics
  28. Distributed Power Generation4▲ 13×1 topic
  29. Materials4▲ 5.9×6 topics
  30. Microgrid Control4▲ 13×1 topic
  31. Structural Analysis4▲ 15×5 topics
  32. Electric Motor Drives4▲ 32×1 topic
  33. Permanent Magnet Machines4▲ 32×1 topic
  34. Fluid Dynamics3▲ 8.6×4 topics
  35. Biomedical Implants3▲ 21×2 topics
  36. Ceramics3▲ 7.3×4 topics
  37. Implantable Devices3▲ 21×2 topics
  38. Sintering3▲ 8.4×5 topics
  39. Pulsed Power3▲ 66×2 topics
  40. Robotic Manipulators3▲ 11×3 topics

Which research topics does Nagaoka University publish most on?

By volume in 2022–2025: Advanced DC-DC Converters, Multilevel Inverters and Converters, Microgrid Control and Optimization and Electric Motor Design and Analysis.

Advanced DC-DC Converters: 7 fractional worksMultilevel Inverters and Converters: 6 fractional worksMicrogrid Control and Op…4Microgrid Control and Optimization: 4 fractional worksElectric Motor Design an…4Electric Motor Design and Analysis: 4 fractional worksEngineering Applied Research: 3 fractional worksWireless Power Transfer Systems: 3 fractional worksAdvanced Battery Technol…3Advanced Battery Technologies Research: 3 fractional worksTeleoperation and Haptic Systems: 2 fractional worksOccupational Health and Safety Research: 2 fractional worksTopology Optimization in Engineering: 2 fractional works
Electrical and Electronic EngineeringControl and Systems EngineeringCivil and Structural EngineeringAutomotive Engineering2 others

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

  1. 1 Advanced DC-DC Converters Electrical and Electronic Engineering 7 works
  2. 2 Multilevel Inverters and Converters Electrical and Electronic Engineering 6 works
  3. 3 Microgrid Control and Optimization Control and Systems Engineering 4 works
  4. 4 Electric Motor Design and Analysis Electrical and Electronic Engineering 4 works
  5. 5 Engineering Applied Research Civil and Structural Engineering 3 works
  6. 6 Wireless Power Transfer Systems Electrical and Electronic Engineering 3 works
  7. 7 Advanced Battery Technologies Research Automotive Engineering 3 works
  8. 8 Teleoperation and Haptic Systems Mechanical Engineering 2 works
  9. 9 Occupational Health and Safety Research Radiological and Ultrasound Technology 2 works
  10. 10 Topology Optimization in Engineering Civil and Structural Engineering 2 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 available49.6%not open50.4%

World: 28% of research is openly available.

with international co-authors10.3%domestic only89.7%

World: 19% is written across borders.

How has Nagaoka University's research output changed?

Output in 2018–2022 was 17% 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 Nagaoka

All research institutions in Nagaoka

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.