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University · Ōita · Japan

Oita University

In research, Oita University stands highest in Medicine (#2,172 of 10,443 worldwide), Health Sciences (#3,072 of 11,982 worldwide) and Life Sciences (#3,348 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Surgery, Cardiology and Cardiovascular Medicine and Pulmonary and Respiratory Medicine — Surgery is 4.8× its share of world research.

oita-u.ac.jp/englishROR OpenAlex
World rank, 2022–2025
#5,785
of 28,054 · #5,305 all time
Rank in Japan
#140
of 1,070
Research works
10k
▼ 9% vs 2013–17
Citations
134k
13.4 per fractional work
Top-10% rate
7.8%
record average 16.5%
Open access
44%
world 28%

What is Oita 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
MedicineField #2,172 of 10,443 9.5%592 #2968
Health SciencesDomain #3,072 of 11,982 9.3%625 #3827
Life SciencesDomain #3,348 of 7,800 8.9%151 #2702
SurgerySubfield #840 of 1,816 9.6%129 #973
Physical SciencesDomain #7,838 of 12,888 3.3%319 #5627
Social SciencesDomain #7,164 of 10,521 12.3%62 #9699
Biochemistry, Genetics and Molecular BiologyField #3,151 of 3,579 9.7%79 #2866
Pulmonary and Respiratory MedicineSubfield #1,034 of 1,144 7.5%72 #1316
EngineeringField #6,122 of 6,636 1.1%176 #4806

Each strip is that field’s whole ranked pool, with the notch where Oita 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. Medicine#2,968 #2,172
  2. Health Sciences#3,827 #3,072
  3. Life Sciences#2,702 #3,348
  4. Surgery#973 #840
  5. Physical Sciences#5,627 #7,838
  6. Social Sciences#9,699 #7,164
  7. Biochemistry, Genetics and Molecular Biology#2,866 #3,151
  8. Pulmonary and Respiratory Medicine#1,316 #1,034
  9. Engineering#4,806 #6,122
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 Oita University specialise in?

Where its research is concentrated relative to its size: Surgery takes 4.8× the share of its output that it takes of world research.

  1. SurgerySubfield · 128.8 works4.8×
  2. Cardiology and Cardiovascular MedicineSubfield · 53.2 works4.4×
  3. Pulmonary and Respiratory MedicineSubfield · 71.9 works4.0×
  4. Endocrinology, Diabetes and MetabolismSubfield · 22.2 works3.5×
← 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: 0.21× its world share, 12 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.28× its world share, 79 worksBiochemistry, Geneti…Immunology and Microbiology: 2.29× its world share, 27 worksImmunology and Micro…Neuroscience: 1.51× its world share, 28 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.37× its world share, 6 worksPharmacology, Toxico…Chemical Engineering: 0.83× its world share, 3 worksChemical EngineeringChemistry: 0.87× its world share, 16 worksChemistryComputer Science: 0.43× its world share, 38 worksComputer ScienceEarth and Planetary Sciences: 0.21× its world share, 4 worksEarth and Planetary …Energy: 0.34× its world share, 4 worksEnergyEngineering: 1.01× its world share, 176 worksEngineeringEnvironmental Science: 0.24× its world share, 14 worksEnvironmental ScienceMaterials Science: 0.79× its world share, 32 worksMaterials ScienceMathematics: 1.58× its world share, 22 worksMathematicsPhysics and Astronomy: 0.42× its world share, 11 worksPhysics and AstronomyDentistry: 0.61× its world share, 3 worksDentistryHealth Professions: 0.70× its world share, 21 worksHealth ProfessionsMedicine: 2.66× its world share, 592 worksMedicineNursing: 0.84× its world share, 5 worksNursingVeterinary: 1.94× its world share, 3 worksVeterinaryArts and Humanities: 0.14× its world share, 5 worksArts and HumanitiesBusiness, Management and Accounting: 0.16× its world share, 6 worksBusiness, Management…Decision Sciences: 0.31× its world share, 3 worksDecision SciencesEconomics, Econometrics and Finance: 0.22× its world share, 6 worksEconomics, Econometr…Psychology: 0.58× its world share, 21 worksPsychologySocial Sciences: 0.15× its world share, 22 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Medicine, 2.7×. Every wedge is a field page.

Who are the top researchers at Oita University?

Ranked on the composite score, Hirotaka Shibata, Seigo Kitano and Hidetsugu Ueyama lead among researchers whose main affiliation is Oita University.

  1. 1 Hirotaka Shibata Japan · #58,017 worldwide 389 citations · 62 works
  2. 2 Seigo Kitano Japan · #59,778 worldwide 377 citations · 151 works
  3. 3 Hidetsugu Ueyama Japan · #122,675 worldwide 140 citations · 26 works
  4. 4 Naohiko Takahashi Japan · #159,511 worldwide 392 citations · 102 works
  5. 5 Masafumi Inomata Japan · #190,171 worldwide 148 citations · 84 works
  6. 6 Toshihide Kumamoto Japan · #207,617 worldwide 86 citations · 36 works
  7. 7 Yukio Iwashita Japan · #214,831 worldwide 109 citations · 19 works
  8. 8 Katsutoshi Nagaoka Japan · #221,967 worldwide 319 citations · 33 works
  9. 9 Kazunari Murakami Japan · #232,866 worldwide 134 citations · 60 works
  10. 10 Eishi Miyazaki Japan · #237,765 worldwide 44 citations · 24 works
All ranked researchers at Oita University

Which keywords describe research at Oita University?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Inflammation, Chemotherapy, Diagnosis, Clinical Practice Guidelines, Treatment, Pathogenesis and Cardiovascular Disease.

▲ 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. Epidemiology112▲ 2.4×106 topics
  2. Inflammation71▲ 2.9×67 topics
  3. Chemotherapy44▲ 5.4×21 topics
  4. Diagnosis43▲ 4.0×37 topics
  5. Treatment42▲ 3.0×40 topics
  6. Cardiovascular Disease35▲ 2.7×32 topics
  7. Clinical Practice Guidelines34▲ 5.3×14 topics
  8. Obesity28▲ 3.2×21 topics
  9. Immunotherapy28▲ 3.4×18 topics
  10. Pathogenesis27▲ 4.6×22 topics
  11. Cancer26▲ 1.70×47 topics
  12. Quality of Life25▲ 1.51×32 topics
  13. Complications24▲ 4.1×15 topics
  14. Genetic Mutations24▲ 4.7×21 topics
  15. Prognostic Factors22▲ 4.5×14 topics
  16. Metabolic Syndrome21▲ 2.3×18 topics
  17. Hypertension21▲ 6.2×13 topics
  18. Gastric Cancer20▲ 16×3 topics
  19. Management20▲ 2.2×22 topics
  20. Surgical Management20▲ 4.2×19 topics
  21. Biomechanics20▲ 5.7×11 topics
  22. Heart Failure18▲ 3.7×13 topics
  23. Rehabilitation18▲ 3.9×10 topics
  24. Antibiotic Resistance17▲ 3.9×10 topics
  25. Radiotherapy17▲ 3.9×11 topics
  26. Prevention17▲ 3.5×12 topics
  27. Molecular Characterization16▲ 7.8×6 topics
  28. Survival Analysis16▲ 5.1×6 topics
  29. Adjuvant Therapy15▲ 10×2 topics
  30. Neoadjuvant Therapy15▲ 5.5×5 topics
  31. Atherosclerosis14▲ 4.3×10 topics
  32. Echocardiography14▲ 4.4×6 topics
  33. Revision Surgery14▲ 9.5×2 topics
  34. Total Hip Replacement14▲ 9.5×2 topics
  35. Molecular Classification13▲ 7.5×4 topics
  36. Cardiovascular Events12▲ 8.6×3 topics
  37. Eradication Therapy11▲ 29×1 topic
  38. Helicobacter pylori11▲ 29×1 topic
  39. Control11▲ 7.4×6 topics
  40. Endoscopic Resection11▲ 9.8×2 topics

Which research topics does Oita University publish most on?

By volume in 2022–2025: Helicobacter pylori-related gastroenterology studies, Non-Destructive Testing Techniques, Hormonal Regulation and Hypertension and Gastric Cancer Management and Outcomes.

Helicobacter pylori-rela…11Helicobacter pylori-related gastroenterology studies: 11 fractional worksNon-Destructive Testing …10Non-Destructive Testing Techniques: 10 fractional worksHormonal Regulation and Hypertension: 9 fractional worksGastric Cancer Managemen…9Gastric Cancer Management and Outcomes: 9 fractional worksCardiovascular Disease a…9Cardiovascular Disease and Adiposity: 9 fractional worksTotal Knee Arthroplasty Outcomes: 8 fractional worksMagnetic Properties and Applications: 7 fractional worksLung Cancer Diagnosis an…6Lung Cancer Diagnosis and Treatment: 6 fractional worksAcoustic Wave Phenomena Research: 6 fractional worksPancreatic and Hepatic Oncology Research: 6 fractional works
SurgeryMechanical EngineeringEndocrinology, Diabetes and MetabolismPulmonary and Respiratory Medicine4 others

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

  1. 1 Helicobacter pylori-related gastroenterology studies Surgery 11 works
  2. 2 Non-Destructive Testing Techniques Mechanical Engineering 10 works
  3. 3 Hormonal Regulation and Hypertension Endocrinology, Diabetes and Metabolism 9 works
  4. 4 Gastric Cancer Management and Outcomes Pulmonary and Respiratory Medicine 9 works
  5. 5 Cardiovascular Disease and Adiposity Cardiology and Cardiovascular Medicine 9 works
  6. 6 Total Knee Arthroplasty Outcomes Surgery 8 works
  7. 7 Magnetic Properties and Applications Electronic, Optical and Magnetic Materials 7 works
  8. 8 Lung Cancer Diagnosis and Treatment Pulmonary and Respiratory Medicine 6 works
  9. 9 Acoustic Wave Phenomena Research Biomedical Engineering 6 works
  10. 10 Pancreatic and Hepatic Oncology Research Oncology 6 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-authors8.2%domestic only91.8%

World: 19% is written across borders.

How has Oita University'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 Ōita

All research institutions in Ōita

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.