Science Explorer Back to mapMap
Discussion
University · Nagaoka · Japan

Nagaoka University

In research, Nagaoka University stands highest in Physical Sciences (#9,108 of 10,670 worldwide) and Engineering (#5,342 of 5,901 worldwide), 2022-now. Relative to its size it is most specialised in Electrical and Electronic Engineering (Electrical and Electronic Engineering is 4.1× its share of world research).

nagaokauniv.ac.jpROR OpenAlex
World rank, 2022-now
#13,149
of 22,385 · #33,453 all time
Rank in Japan
#358
of 924
Research works
4.1k
▼ 43% vs 2018-21
Citations
31k
7.6 per fractional work
Top-10% rate
3.2%
all institutions 10.0%
vs its own fields
0.71×
1.00× is exactly expected
Open access
50%
world 40%
International
10%
world 18%
Nagaoka University

What is Nagaoka University known for in research?

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

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #9,108 of 10,670 1.6%224 #17189
EngineeringField #5,342 of 5,901 1.5%141 #8176

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 average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which fields of science does Nagaoka University work in?

In 2022-now, 76% of research at Nagaoka University is in Physical Sciences, 9% in Social Sciences. Its largest fields are Engineering (47%), Materials Science (10%), Computer Science (6%). It does 1.9× the world's share of Physical Sciences.

Physical Sciences: 255 fractional works · 76.4% of its workEngineering: 155 fractional works · 46.6% of its workElectrical and Electronic Engineering: 49 fractional works · 14.6% of its workMechanical Engineering: 18 fractional works · 5.5% of its workCivil and Structural Engineering: 16 fractional works · 4.8% of its workBiomedical Engineering: 16 fractional works · 4.8% of its workControl and Systems Engineering: 15 fractional works · 4.6% of its workAerospace Engineering: 10 fractional works · 2.9% of its workAutomotive Engineering: 7 fractional works · 2.0% of its workMechanics of Materials: 6 fractional works · 1.7% of its workComputational Mechanics: 5 fractional works · 1.4% of its workOcean Engineering: 4 fractional works · 1.2% of its workBuilding and Construction: 3 fractional works · 1.0% of its workIndustrial and Manufacturing Engineering: 3 fractional works · 0.9% of its workMedia Technology: 2 fractional works · 0.6% of its workSafety, Risk, Reliability and Quality: 2 fractional works · 0.5% of its workMaterials Science: 32 fractional works · 9.7% of its workMaterials Chemistry: 15 fractional works · 4.6% of its workElectronic, Optical and Magnetic Materials: 6 fractional works · 1.8% of its workPolymers and Plastics: 4 fractional works · 1.2% of its workBiomaterials: 4 fractional works · 1.1% of its workCeramics and Composites: 2 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.4% of its workComputer Science: 21 fractional works · 6.4% of its workArtificial Intelligence: 6 fractional works · 1.9% of its workComputer Vision and Pattern Recognition: 4 fractional works · 1.1% of its workInformation Systems: 3 fractional works · 0.9% of its workComputer Networks and Communications: 3 fractional works · 0.8% of its workHuman-Computer Interaction: 2 fractional works · 0.6% of its workComputational Theory and Mathematics: 2 fractional works · 0.5% of its workComputer Graphics and Computer-Aided Design: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.4% of its workEnvironmental Science: 16 fractional works · 4.9% of its workWater Science and Technology: 2 fractional works · 0.6% of its workIndustrial and Manufacturing Engineering: 2 fractional works · 0.6% of its workManagement, Monitoring, Policy and Law: 2 fractional works · 0.6% of its workPollution: 2 fractional works · 0.6% of its workGlobal and Planetary Change: 2 fractional works · 0.6% of its workNature and Landscape Conservation: 2 fractional works · 0.5% of its workEcology: 2 fractional works · 0.5% of its workEnvironmental Chemistry: 1 fractional works · 0.3% of its workHealth, Toxicology and Mutagenesis: 1 fractional works · 0.3% of its workEnvironmental Engineering: 1 fractional works · 0.2% of its workPhysics and Astronomy: 15 fractional works · 4.4% of its workAtomic and Molecular Physics, and Optics: 5 fractional works · 1.4% of its workStatistical and Nonlinear Physics: 3 fractional works · 0.8% of its workAstronomy and Astrophysics: 3 fractional works · 0.8% of its workNuclear and High Energy Physics: 2 fractional works · 0.7% of its workCondensed Matter Physics: 1 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.3% of its workChemistry: 6 fractional works · 1.8% of its workOrganic Chemistry: 3 fractional works · 0.9% of its workInorganic Chemistry: 2 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.4% of its workEnergy: 4 fractional works · 1.2% of its workRenewable Energy, Sustainability and the Environment: 3 fractional works · 0.8% of its workEnergy Engineering and Power Technology: 1 fractional works · 0.4% of its workEarth and Planetary Sciences: 2 fractional works · 0.7% of its workChemical Engineering: 2 fractional works · 0.5% of its workCatalysis: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.3% of its workMathematics: 1 fractional works · 0.3% of its workSocial Sciences: 30 fractional works · 9.0% of its workSocial Sciences: 12 fractional works · 3.5% of its workSociology and Political Science: 5 fractional works · 1.4% of its workTransportation: 3 fractional works · 0.8% of its workEducation: 1 fractional works · 0.4% of its workSmaller subfields together: 3 fractional works · 1.0% of its workPsychology: 7 fractional works · 2.0% of its workSocial Psychology: 3 fractional works · 1.0% of its workExperimental and Cognitive Psychology: 2 fractional works · 0.5% of its workDevelopmental and Educational Psychology: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.2% of its workEconomics, Econometrics and Finance: 4 fractional works · 1.1% of its workEconomics and Econometrics: 3 fractional works · 1.0% of its workSmaller subfields together: 1 fractional works · 0.2% of its workBusiness, Management and Accounting: 4 fractional works · 1.1% of its workStrategy and Management: 1 fractional works · 0.3% of its workManagement Information Systems: 1 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.5% of its workArts and Humanities: 2 fractional works · 0.6% of its workDecision Sciences: 2 fractional works · 0.6% of its workStatistics, Probability and Uncertainty: 1 fractional works · 0.3% of its workManagement Science and Operations Research: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.0% of its workLife Sciences: 25 fractional works · 7.4% of its workBiochemistry, Genetics and Molecular Biology: 10 fractional works · 2.9% of its workMolecular Biology: 5 fractional works · 1.6% of its workBiotechnology: 2 fractional works · 0.5% of its workBiochemistry: 1 fractional works · 0.2% of its workSmaller subfields together: 2 fractional works · 0.5% of its workAgricultural and Biological Sciences: 9 fractional works · 2.7% of its workPlant Science: 3 fractional works · 1.0% of its workInsect Science: 2 fractional works · 0.6% of its workFood Science: 1 fractional works · 0.4% of its workGeneral Agricultural and Biological Sciences: 1 fractional works · 0.3% of its workAquatic Science: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.2% of its workNeuroscience: 6 fractional works · 1.7% of its workCognitive Neuroscience: 4 fractional works · 1.1% of its workSensory Systems: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workPharmacology, Toxicology and Pharmaceutics: 0 fractional works · 0.1% of its workImmunology and Microbiology: 0 fractional works · 0.1% of its workHealth Sciences: 24 fractional works · 7.2% of its workMedicine: 18 fractional works · 5.5% of its workPulmonary and Respiratory Medicine: 2 fractional works · 0.7% of its workPsychiatry and Mental health: 2 fractional works · 0.6% of its workRadiology, Nuclear Medicine and Imaging: 2 fractional works · 0.5% of its workSurgery: 2 fractional works · 0.5% of its workPhysiology: 1 fractional works · 0.3% of its workPharmacology: 1 fractional works · 0.3% of its workEpidemiology: 1 fractional works · 0.2% of its workComplementary and alternative medicine: 1 fractional works · 0.2% of its workPublic Health, Environmental and Occupational Health: 1 fractional works · 0.2% of its workEndocrinology, Diabetes and Metabolism: 1 fractional works · 0.2% of its workSmaller subfields together: 6 fractional works · 1.7% of its workHealth Professions: 4 fractional works · 1.2% of its workRadiological and Ultrasound Technology: 2 fractional works · 0.7% of its workSmaller subfields together: 2 fractional works · 0.5% of its workNursing: 1 fractional works · 0.2% of its workNutrition and Dietetics: 1 fractional works · 0.2% of its workDentistry: 1 fractional works · 0.2% of its workVeterinary: 0 fractional works · 0.0% of its workALL ITS WORKNagaokaUniversity333fractional works, 2022-now
Life Sciences7%Physical Sciences76%Health Sciences7%Social Sciences9%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 26 fields, with their numbers
    1. Engineering15546.6%
    2. Materials Science329.7%
    3. Computer Science216.4%
    4. Environmental Science164.9%
    5. Physics and Astronomy154.4%
    6. Chemistry61.8%
    7. Energy41.2%
    8. Earth and Planetary Sciences20.7%
    9. Chemical Engineering20.5%
    10. Mathematics10.3%
    1. Social Sciences123.5%
    2. Psychology72.0%
    3. Economics, Econometrics and Finance41.1%
    4. Business, Management and Accounting41.1%
    5. Arts and Humanities20.6%
    6. Decision Sciences20.6%
    1. Biochemistry, Genetics and Molecular Biology102.9%
    2. Agricultural and Biological Sciences92.7%
    3. Neuroscience61.7%
    4. Pharmacology, Toxicology and Pharmaceutics00.1%
    5. Immunology and Microbiology00.1%
    1. Medicine185.5%
    2. Health Professions41.2%
    3. Nursing10.2%
    4. Dentistry10.2%
    5. Veterinary00.0%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does Nagaoka University specialise in?

Where its research is concentrated relative to its size: Electrical and Electronic Engineering takes 4.1× the share of its output that it takes of world research.

  1. Electrical and Electronic EngineeringSubfield · 48.6 works4.1×
← 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: 0.56× its world share, 9 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.54× its world share, 10 worksBiochemistry, Geneti…Immunology and Microbiology: 0.10× its world share, 0 worksImmunology and Micro…Neuroscience: 1.05× its world share, 6 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.37× its world share, 0 worksPharmacology, Toxico…Chemical Engineering: 1.50× its world share, 2 worksChemical EngineeringChemistry: 1.12× its world share, 6 worksChemistryComputer Science: 0.82× its world share, 21 worksComputer ScienceEarth and Planetary Sciences: 0.47× its world share, 2 worksEarth and Planetary …Energy: 1.29× its world share, 4 worksEnergyEngineering: 3.10× its world share, 155 worksEngineeringEnvironmental Science: 0.98× its world share, 16 worksEnvironmental ScienceMaterials Science: 2.77× its world share, 32 worksMaterials ScienceMathematics: 0.23× its world share, 1 worksMathematicsPhysics and Astronomy: 1.97× its world share, 15 worksPhysics and AstronomyDentistry: 0.34× its world share, 1 worksDentistryHealth Professions: 0.47× its world share, 4 worksHealth ProfessionsMedicine: 0.29× its world share, 18 worksMedicineNursing: 0.51× its world share, 1 worksNursingVeterinary: 0.25× its world share, 0 worksVeterinaryArts and Humanities: 0.21× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.35× its world share, 4 worksBusiness, Management…Decision Sciences: 0.59× its world share, 2 worksDecision SciencesEconomics, Econometrics and Finance: 0.54× its world share, 4 worksEconomics, Econometr…Psychology: 0.65× its world share, 7 worksPsychologySocial Sciences: 0.28× its world share, 12 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Engineering, 3.1×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Engineering3.10×155 works
  2. Materials Science2.77×32 works
  3. Physics and Astronomy1.97×15 works
  4. Chemical Engineering1.50×2 works
  5. Energy1.29×4 works
  6. Chemistry1.12×6 works
  7. Neuroscience1.05×6 works
  8. Environmental Science0.98×16 works
  9. Computer Science0.82×21 works
  10. Psychology0.65×7 works
  11. Decision Sciences0.59×2 works
  12. Agricultural and Biological Sciences0.56×9 works
  13. Biochemistry, Genetics and Molecular Biology0.54×10 works
  14. Economics, Econometrics and Finance0.54×4 works
  15. Nursing0.51×1 works
  16. Earth and Planetary Sciences0.47×2 works
  17. Health Professions0.47×4 works
  18. Pharmacology, Toxicology and Pharmaceutics0.37×0 works
  19. Business, Management and Accounting0.35×4 works
  20. Dentistry0.34×1 works
  21. Medicine0.29×18 works
  22. Social Sciences0.28×12 works
  23. Veterinary0.25×0 works
  24. Mathematics0.23×1 works
  25. Arts and Humanities0.21×2 works
  26. Immunology and Microbiology0.10×0 works

Who are the top researchers at Nagaoka University?

Ranked on the quality score, Akira Nabae, Tsukasa Washio and Kouji Imai lead among researchers whose main affiliation is Nagaoka University.

  1. 1 Akira Nabae Japan · #2,464,927 worldwide 13k citations · 114 works
  2. 2 Tsukasa Washio Japan · #5,632,170 worldwide 929 citations · 23 works
  3. 3 Kouji Imai Japan · #6,383,832 worldwide 443 citations · 19 works
  4. 4 Shoichi Okamoto Japan · #6,639,586 worldwide 512 citations · 47 works
  5. 5 Hiroki SUGIMURA Japan · #6,658,115 worldwide 152 citations · 21 works
  6. 6 Kyohei Sakuda Japan · #6,734,876 worldwide 732 citations · 22 works
  7. 7 Ken-ichi Minato Japan · #6,756,964 worldwide 251 citations · 24 works
  8. 8 Isao Takahashi Japan · #6,807,716 worldwide 21k citations · 791 works
  9. 9 Sachio Naito Japan · #6,930,648 worldwide 57 citations · 18 works
  10. 10 Yoshiya Ohnuma Japan · #6,937,195 worldwide 485 citations · 36 works
All ranked researchers at Nagaoka University

What are the most cited papers from Nagaoka University?

The most cited paper from Nagaoka University is "Generation and Detection of Reactive Oxygen Species in Photocatalysis" (Yoshio Nosaka, Atsuko Y. Nosaka, 2017), with 4,774 citations. Next come "A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor" (3,418) and "Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components" (3,379).

Most cited papers
#PaperReleasedCitations
1 Generation and Detection of Reactive Oxygen Species in Photocatalysis Yoshio Nosaka, Atsuko Y. Nosaka · Chemical Reviews Review 4 Aug 2017 4,774
2 A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor Isao Takahashi, Toshihiko Noguchi · IEEE Transactions on Industry Applications Sep 1986 3,418
3 Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components Hirofumi Akagi, Yoshihira Kanazawa, Akira Nabae · IEEE Transactions on Industry Applications May 1984 3,379
4 Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3 R. Abbott et al. · Physical Review X Open access1,654 authors 29 Mar 2023 926
5 Control Strategy of Active Power Filters Using Multiple Voltage-Source PWM Converters Hirofumi Akagi, Akira Nabae, Satoshi Atoh · IEEE Transactions on Industry Applications May 1986 712
All 60 most cited papers, with filters and sorting

Which keywords describe research at Nagaoka University?

By fractional works in 2022-now, 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 Multilevel Converters.

▲ 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-now 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 Electronics23▲ 22×8 topics
  2. Renewable Energy Integration19▲ 17×4 topics
  3. Electric Vehicle Charging11▲ 39×2 topics
  4. Biomedical Applications11▲ 2.7×26 topics
  5. Nanoparticles9▲ 2.2×24 topics
  6. Mechanical Properties8▲ 2.4×24 topics
  7. DC-DC Converters8▲ 41×1 topic
  8. High-Frequency Power Conversion8▲ 41×1 topic
  9. Model Predictive Control8▲ 8.8×4 topics
  10. Fault Tolerance7▲ 14×3 topics
  11. Energy Efficiency7▲ 2.2×15 topics
  12. Multilevel Converters7▲ 37×1 topic
  13. Voltage Source Inverters7▲ 37×1 topic
  14. Nanocomposites6▲ 2.4×17 topics
  15. Thermal Analysis6▲ 15×5 topics
  16. Additive Manufacturing6▲ 5.9×6 topics
  17. Finite Element Method6▲ 18×6 topics
  18. Wireless Power Transfer6▲ 19×2 topics
  19. Adaptive Control6▲ 12×5 topics
  20. Numerical Simulation5▲ 5.6×9 topics
  21. Thermal Management5▲ 4.7×5 topics
  22. Efficiency Optimization5▲ 32×2 topics
  23. Material Properties5▲ 14×3 topics
  24. Polymer Composites5▲ 5.2×6 topics
  25. Energy Storage Systems4▲ 9.8×2 topics
  26. Wastewater Treatment4▲ 5.5×6 topics
  27. Decentralized Control4▲ 11×2 topics
  28. Failure Analysis4▲ 14×6 topics
  29. Distributed Power Generation4▲ 12×1 topic
  30. Electric Motor Drives4▲ 33×1 topic
  31. Microgrid Control4▲ 12×1 topic
  32. Permanent Magnet Machines4▲ 33×1 topic
  33. Biomedical Implants4▲ 22×2 topics
  34. Materials4▲ 5.3×6 topics
  35. Structural Analysis4▲ 14×5 topics
  36. Surface Modification4▲ 8.3×5 topics
  37. Implantable Devices4▲ 21×2 topics
  38. Pulsed Power4▲ 70×2 topics
  39. Fluid Dynamics4▲ 7.4×4 topics
  40. Induction Motors3▲ 23×2 topics

Which research topics does Nagaoka University publish most on?

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

Advanced DC-DC Converters: 8 fractional worksMultilevel Inverters and Converters: 7 fractional worksMicrogrid Control and Op…4Microgrid Control and Optimization: 4 fractional worksElectric Motor Design an…4Electric Motor Design and Analysis: 4 fractional worksWireless Power Transfer Systems: 3 fractional worksEngineering Applied Research: 3 fractional worksAdvanced Battery Technol…3Advanced Battery Technologies Research: 3 fractional worksPulsed Power Technology Applications: 2 fractional worksEnergy Harvesting in Wireless Networks: 2 fractional worksTopology Optimization in Engineering: 2 fractional works
Electrical and Electronic EngineeringControl and Systems EngineeringCivil and Structural EngineeringAutomotive Engineering

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

  1. 1 Advanced DC-DC Converters Electrical and Electronic Engineering 8 works
  2. 2 Multilevel Inverters and Converters Electrical and Electronic Engineering 7 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 Wireless Power Transfer Systems Electrical and Electronic Engineering 3 works
  6. 6 Engineering Applied Research Civil and Structural Engineering 3 works
  7. 7 Advanced Battery Technologies Research Automotive Engineering 3 works
  8. 8 Pulsed Power Technology Applications Control and Systems Engineering 2 works
  9. 9 Energy Harvesting in Wireless Networks Electrical and Electronic Engineering 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: 40% of research is openly available.

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

World: 18% is written across borders.

How has Nagaoka University's research output changed?

Output in 2022-2025 was 43% lower than in 2018-2021.

still counting1990200020102020
grewheldshrank

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

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Nagaoka University as a percentage of every work published that year, 0.0013% in 2024.

still counting0.0050%0.010%0.015%Nagaoka University0.0014% in 202519801990200020102020

Fractional works of Nagaoka University over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025Nagaoka University3.5% in 2025200020102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 5.2% in 1990.

Other research institutions in Nagaoka

All research institutions in Nagaoka

Share Nagaoka University's ranking

Nagaoka University on Science Explorer

A card with Nagaoka University's standing and the fields it leads in, for a post or a slide. A link to this page previews as the same card.

Download the card

1200 × 630 PNG, sized for social posts, drawn from the latest snapshot.

Badges for a website1Each links back here and updates with every snapshot

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners have tabs of their own, above.

Discussion

Ask a question or share a note about Nagaoka University. Posts are plain text and can be reported.