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University · Niigata · Japan

Niigata University

In research, Niigata University stands highest in Health Sciences (#1,532 of 11,982 worldwide), Medicine (#1,707 of 10,443 worldwide) and Physical Sciences (#2,566 of 12,888 worldwide), 2022–2025. Relative to its size it is most specialised in Periodontics, Nephrology and Dentistry — Periodontics is 5.9× its share of world research.

niigata-u.ac.jpROR OpenAlex
World rank, 2022–2025
#2,843
of 28,054 · #1,228 all time
Rank in Japan
#47
of 1,070
Research works
31k
▼ 8% vs 2013–17
Citations
497k
16.1 per fractional work
Top-10% rate
10.7%
record average 16.5%
Open access
44%
world 28%

What is Niigata 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
Health SciencesDomain #1,532 of 11,982 11.5%1,014 #1263
MedicineField #1,707 of 10,443 11.0%884 #1304
Physical SciencesDomain #2,566 of 12,888 7.7%936 #1065
Life SciencesDomain #2,000 of 7,800 14.6%479 #940
EngineeringField #3,461 of 6,636 5.4%365 #986
Biochemistry, Genetics and Molecular BiologyField #1,984 of 3,579 12.6%242 #937
SurgerySubfield #1,104 of 1,816 9.4%122 #997
Agricultural and Biological SciencesField #2,133 of 3,409 22.6%100 #2530
NeuroscienceField #736 of 1,168 12.3%98 #493
Physics and AstronomyField #1,108 of 1,646 19.8%86 #796

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

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. Health Sciences#1,263 #1,532
  2. Medicine#1,304 #1,707
  3. Physical Sciences#1,065 #2,566
  4. Life Sciences#940 #2,000
  5. Engineering#986 #3,461
  6. Biochemistry, Genetics and Molecular Biology#937 #1,984
  7. Surgery#997 #1,104
  8. Agricultural and Biological Sciences#2,530 #2,133
  9. Neuroscience#493 #736
  10. Physics and Astronomy#796 #1,108
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 Niigata University specialise in?

Where its research is concentrated relative to its size: Periodontics takes 5.9× the share of its output that it takes of world research.

  1. PeriodonticsSubfield · 20.8 works5.9×
  2. NephrologySubfield · 27.6 works5.0×
  3. DentistryField · 55.0 works4.4×
← 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: 0.81× its world share, 100 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.76× its world share, 242 worksBiochemistry, Geneti…Immunology and Microbiology: 1.27× its world share, 33 worksImmunology and Micro…Neuroscience: 2.35× its world share, 98 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.79× its world share, 7 worksPharmacology, Toxico…Chemical Engineering: 0.91× its world share, 8 worksChemical EngineeringChemistry: 1.26× its world share, 51 worksChemistryComputer Science: 0.53× its world share, 106 worksComputer ScienceEarth and Planetary Sciences: 1.66× its world share, 67 worksEarth and Planetary …Energy: 0.79× its world share, 19 worksEnergyEngineering: 0.95× its world share, 365 worksEngineeringEnvironmental Science: 0.86× its world share, 110 worksEnvironmental ScienceMaterials Science: 0.82× its world share, 74 worksMaterials ScienceMathematics: 1.65× its world share, 50 worksMathematicsPhysics and Astronomy: 1.50× its world share, 86 worksPhysics and AstronomyDentistry: 4.40× its world share, 55 worksDentistryHealth Professions: 0.86× its world share, 58 worksHealth ProfessionsMedicine: 1.79× its world share, 884 worksMedicineNursing: 1.13× its world share, 14 worksNursingVeterinary: 0.70× its world share, 2 worksVeterinaryArts and Humanities: 0.17× its world share, 13 worksArts and HumanitiesBusiness, Management and Accounting: 0.22× its world share, 18 worksBusiness, Management…Decision Sciences: 0.31× its world share, 8 worksDecision SciencesEconomics, Econometrics and Finance: 0.28× its world share, 15 worksEconomics, Econometr…Psychology: 0.47× its world share, 37 worksPsychologySocial Sciences: 0.16× its world share, 53 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Dentistry, 4.4×. Every wedge is a field page.

Who are the top researchers at Niigata University?

Ranked on the composite score, Yoichi Ajioka, Kosuke Yoshihara and Masatoyo Nishizawa lead among researchers whose main affiliation is Niigata University.

  1. 1 Yoichi Ajioka Japan · #25,083 worldwide 453 citations · 65 works
  2. 2 Kosuke Yoshihara Japan · #55,634 worldwide 1k citations · 27 works
  3. 3 Masatoyo Nishizawa Japan · #58,039 worldwide 200 citations · 57 works
  4. 4 Yoshihiko Tomita Japan · #59,588 worldwide 334 citations · 63 works
  5. 5 Tadashi Aoki Japan · #64,182 worldwide 235 citations · 47 works
  6. 6 Hiromasa Yoshie Japan · #65,290 worldwide 320 citations · 63 works
  7. 7 Takeshi Watanabe Japan · #71,170 worldwide 626 citations · 139 works
  8. 8 Hiroyuki Nawa Japan · #76,207 worldwide 339 citations · 30 works
  9. 9 Fusahiro Ikuta Japan · #86,255 worldwide 189 citations · 46 works
  10. 10 Atsushi Suzuki Japan · #87,929 worldwide 249 citations · 32 works
All ranked researchers at Niigata University

Which keywords describe research at Niigata University?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Inflammation, Neurological Disorders, Neurodegeneration, Quality of Life, Oxidative Stress, Treatment and Cancer.

▲ 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. Epidemiology162▲ 1.59×118 topics
  2. Inflammation113▲ 2.1×76 topics
  3. Oxidative Stress71▲ 1.69×50 topics
  4. Quality of Life69▲ 1.86×44 topics
  5. Treatment62▲ 1.98×44 topics
  6. Deep Learning61▼ 0.69×63 topics
  7. Cancer61▲ 1.76×49 topics
  8. Climate Change60◆ 0.87×72 topics
  9. Neurological Disorders51▲ 3.5×19 topics
  10. Cardiovascular Disease49▲ 1.71×33 topics
  11. Diagnosis47▲ 1.95×37 topics
  12. Chemotherapy45▲ 2.5×24 topics
  13. Neurodegeneration41▲ 5.3×10 topics
  14. Immunotherapy40▲ 2.2×18 topics
  15. Remote Sensing40▲ 1.25×26 topics
  16. Biodiversity35▲ 1.83×18 topics
  17. Genetics35▲ 1.94×24 topics
  18. Genetic Mutations34▲ 3.1×23 topics
  19. Management33▲ 1.62×31 topics
  20. Biomarkers32▲ 1.82×16 topics
  21. Diagnostic Criteria32▲ 5.6×10 topics
  22. Clinical Practice Guidelines30▲ 2.2×14 topics
  23. Aging29▲ 2.1×14 topics
  24. Mitochondrial Dysfunction29▲ 3.8×12 topics
  25. Prognosis28▲ 3.4×9 topics
  26. Neuroinflammation27▲ 3.6×6 topics
  27. Parkinson's Disease26▲ 4.2×8 topics
  28. Rehabilitation25▲ 2.5×10 topics
  29. Chronic Kidney Disease25▲ 4.0×8 topics
  30. Radiotherapy24▲ 2.5×12 topics
  31. Ecosystem Management21▲ 14×2 topics
  32. Clinical Management21▲ 4.7×8 topics
  33. Stroke21▲ 4.5×7 topics
  34. Satoyama20▲ 78×1 topic
  35. landscape conservation20▲ 78×1 topic
  36. Cell Signaling19▲ 4.8×11 topics
  37. Dental Caries18▲ 7.2×2 topics
  38. Nutritional Support16▲ 6.9×3 topics
  39. Therapeutic Strategies16▲ 6.3×2 topics
  40. Dysphagia14▲ 9.1×2 topics

Which research topics does Niigata University publish most on?

By volume in 2022–2025: Urban and spatial planning, Dysphagia Assessment and Management, Alzheimer's disease research and treatments and Oral microbiology and periodontitis research.

Urban and spatial planning20Urban and spatial planning: 20 fractional worksDysphagia Assessment and…14Dysphagia Assessment and Management: 14 fractional worksAlzheimer's disease research and treatments: 11 fractional worksOral microbiology and periodontitis research: 10 fractional worksAdvanced Sensor and Ener…10Advanced Sensor and Energy Harvesting Materials: 10 fractional worksMillimeter-Wave Propagation and Modeling: 10 fractional worksTemporomandibular Joint Disorders: 10 fractional worksTactile and Sensory Inte…10Tactile and Sensory Interactions: 10 fractional worksAcoustic Wave Phenomena Research: 9 fractional worksLiver Disease Diagnosis and Treatment: 9 fractional works
Nature and Landscape ConservationSpeech and HearingPhysiologyPeriodontics5 others

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

  1. 1 Urban and spatial planning Nature and Landscape Conservation 20 works
  2. 2 Dysphagia Assessment and Management Speech and Hearing 14 works
  3. 3 Alzheimer's disease research and treatments Physiology 11 works
  4. 4 Oral microbiology and periodontitis research Periodontics 10 works
  5. 5 Advanced Sensor and Energy Harvesting Materials Biomedical Engineering 10 works
  6. 6 Millimeter-Wave Propagation and Modeling Electrical and Electronic Engineering 10 works
  7. 7 Temporomandibular Joint Disorders Complementary and Manual Therapy 10 works
  8. 8 Tactile and Sensory Interactions Cognitive Neuroscience 10 works
  9. 9 Acoustic Wave Phenomena Research Biomedical Engineering 9 works
  10. 10 Liver Disease Diagnosis and Treatment Epidemiology 9 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 available43.9%not open56.1%

World: 28% of research is openly available.

with international co-authors9.1%domestic only90.9%

World: 19% is written across borders.

How has Niigata University's research output changed?

Output in 2018–2022 was 8% 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 Niigata

All research institutions in Niigata

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.