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University · Okayama · Japan

Okayama University

In research, Okayama University stands highest in Medicine (#1,022 of 10,443 worldwide), Health Sciences (#1,372 of 11,982 worldwide) and Life Sciences (#1,078 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Organic Chemistry — Organic Chemistry is 2.9× its share of world research.

okayama-u.ac.jp/index_e.htmlROR OpenAlex
World rank, 2022–2025
#1,908
of 28,054 · #963 all time
Rank in Japan
#24
of 1,070
Research works
49k
◆ 0% vs 2013–17
Citations
770k
15.6 per fractional work
Top-10% rate
10.7%
record average 16.5%
Open access
48%
world 28%

What is Okayama 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 #1,022 of 10,443 11.0%1,361 #943
Health SciencesDomain #1,372 of 11,982 11.0%1,485 #850
Life SciencesDomain #1,078 of 7,800 14.4%885 #554
Physical SciencesDomain #1,989 of 12,888 7.4%1,623 #1111
Biochemistry, Genetics and Molecular BiologyField #1,019 of 3,579 11.5%466 #636
Plant ScienceSubfield #429 of 1,395 30.2%126 #143
SurgerySubfield #628 of 1,816 10.5%219 #650
Social SciencesDomain #3,849 of 10,521 15.6%300 #3571
EngineeringField #2,690 of 6,636 5.1%655 #1485
Agricultural and Biological SciencesField #1,445 of 3,409 24.9%198 #575

Each strip is that field’s whole ranked pool, with the notch where Okayama 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#943 #1,022
  2. Health Sciences#850 #1,372
  3. Life Sciences#554 #1,078
  4. Physical Sciences#1,111 #1,989
  5. Biochemistry, Genetics and Molecular Biology#636 #1,019
  6. Plant Science#143 #429
  7. Surgery#650 #628
  8. Social Sciences#3,571 #3,849
  9. Engineering#1,485 #2,690
  10. Agricultural and Biological Sciences#575 #1,445
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 Okayama University specialise in?

Where its research is concentrated relative to its size: Organic Chemistry takes 2.9× the share of its output that it takes of world research.

  1. Organic ChemistrySubfield · 93.4 works2.9×
← 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: 0.97× its world share, 198 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 2.03× its world share, 466 worksBiochemistry, Geneti…Immunology and Microbiology: 1.73× its world share, 75 worksImmunology and Micro…Neuroscience: 1.74× its world share, 121 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.66× its world share, 25 worksPharmacology, Toxico…Chemical Engineering: 1.21× its world share, 18 worksChemical EngineeringChemistry: 1.83× its world share, 123 worksChemistryComputer Science: 0.94× its world share, 314 worksComputer ScienceEarth and Planetary Sciences: 0.96× its world share, 65 worksEarth and Planetary …Energy: 0.73× its world share, 29 worksEnergyEngineering: 1.02× its world share, 655 worksEngineeringEnvironmental Science: 0.54× its world share, 116 worksEnvironmental ScienceMaterials Science: 1.09× its world share, 164 worksMaterials ScienceMathematics: 0.71× its world share, 36 worksMathematicsPhysics and Astronomy: 1.08× its world share, 103 worksPhysics and AstronomyDentistry: 2.11× its world share, 44 worksDentistryHealth Professions: 0.50× its world share, 57 worksHealth ProfessionsMedicine: 1.65× its world share, 1,361 worksMedicineNursing: 0.96× its world share, 20 worksNursingVeterinary: 0.48× its world share, 3 worksVeterinaryArts and Humanities: 0.20× its world share, 25 worksArts and HumanitiesBusiness, Management and Accounting: 0.16× its world share, 22 worksBusiness, Management…Decision Sciences: 0.42× its world share, 17 worksDecision SciencesEconomics, Econometrics and Finance: 0.35× its world share, 32 worksEconomics, Econometr…Psychology: 0.67× its world share, 88 worksPsychologySocial Sciences: 0.21× its world share, 116 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Dentistry, 2.1×. Every wedge is a field page.

Who are the top researchers at Okayama University?

Ranked on the composite score, Hitoshi Sakai, Jian‐Ren Shen and Shuichi Wakimoto lead among researchers whose main affiliation is Okayama University.

  1. 1 Hitoshi Sakai Japan · #14,726 worldwide 1.1k citations · 96 works
  2. 2 Jian‐Ren Shen Japan · #22,763 worldwide 904 citations · 66 works
  3. 3 Shuichi Wakimoto Japan · #36,227 worldwide 508 citations · 171 works
  4. 4 Xiujun Li Japan · #39,261 worldwide 468 citations · 50 works
  5. 5 Eiji Ito Japan · #50,274 worldwide 505 citations · 62 works
  6. 6 Akira Yoneda Japan · #60,998 worldwide 421 citations · 54 works
  7. 7 Eiichi Nakayama Japan · #64,475 worldwide 344 citations · 44 works
  8. 8 Jian Feng Japan · #67,332 worldwide 477 citations · 44 works
  9. 9 Hiroo Kagami Japan · #69,529 worldwide 644 citations · 53 works
  10. 10 Naoki Yamaji Japan · #83,608 worldwide 415 citations · 29 works
All ranked researchers at Okayama University

Which keywords describe research at Okayama University?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Inflammation, Oxidative Stress, Chemotherapy, Immunotherapy, Cancer, Treatment and Prognostic Factors.

▲ 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. Epidemiology224▲ 1.32×125 topics
  2. Inflammation174▲ 1.94×80 topics
  3. Oxidative Stress130▲ 1.84×57 topics
  4. Deep Learning111▼ 0.75×73 topics
  5. Cancer104▲ 1.81×53 topics
  6. Machine Learning94▼ 0.67×76 topics
  7. Chemotherapy88▲ 3.0×24 topics
  8. Treatment86▲ 1.66×49 topics
  9. Immunotherapy84▲ 2.8×19 topics
  10. Biomedical Applications82▲ 1.62×34 topics
  11. Diagnosis70▲ 1.76×41 topics
  12. Quality of Life68◆ 1.11×45 topics
  13. Clinical Practice Guidelines58▲ 2.5×14 topics
  14. Prognostic Factors57▲ 3.0×14 topics
  15. Cardiovascular Disease57▲ 1.19×36 topics
  16. Genetic Mutations56▲ 3.0×23 topics
  17. Tumor Microenvironment55▲ 2.9×8 topics
  18. Management54▲ 1.60×33 topics
  19. Surgical Management48▲ 2.7×19 topics
  20. Angiogenesis46▲ 3.3×15 topics
  21. Tissue Engineering46▲ 1.73×13 topics
  22. Gene Expression44▲ 1.70×20 topics
  23. Metabolism44▲ 2.0×27 topics
  24. Molecular Characterization41▲ 5.4×6 topics
  25. Neoadjuvant Therapy40▲ 4.0×5 topics
  26. Reactive Oxygen Species39▲ 2.2×14 topics
  27. Radiotherapy36▲ 2.2×13 topics
  28. Innate Immunity35▲ 2.5×11 topics
  29. PET Imaging32▲ 4.4×5 topics
  30. Gene Therapy30▲ 3.7×6 topics
  31. Cancer Progression30▲ 3.8×8 topics
  32. Endoscopic Resection29▲ 6.8×2 topics
  33. Fibrosis28▲ 3.5×8 topics
  34. Therapy27▲ 3.2×6 topics
  35. Gastric Cancer27▲ 5.5×3 topics
  36. Organic Synthesis25▲ 5.0×8 topics
  37. Adjuvant Therapy24▲ 4.4×2 topics
  38. Transition Metal Catalysis24▲ 6.6×4 topics
  39. Transition Metal Complexes21▲ 5.4×4 topics
  40. Cell Adhesion18▲ 10×3 topics

Which research topics does Okayama University publish most on?

By volume in 2022–2025: Pancreatic and Hepatic Oncology Research, Gastric Cancer Management and Outcomes, Cancer Immunotherapy and Biomarkers and Catalytic C–H Functionalization Methods.

Pancreatic and Hepatic O…19Pancreatic and Hepatic Oncology Research: 19 fractional worksGastric Cancer Managemen…17Gastric Cancer Management and Outcomes: 17 fractional worksCancer Immunotherapy and Biomarkers: 13 fractional worksCatalytic C–H Functionalization Methods: 13 fractional worksLong-Term Effects of COVID-19: 13 fractional worksPhotosynthetic Processes and Mechanisms: 13 fractional worksFluid Dynamics and Turbulent Flows: 13 fractional worksRadical Photochemical Re…12Radical Photochemical Reactions: 12 fractional worksEsophageal Cancer Research and Treatment: 12 fractional worksSoft Robotics and Applications: 12 fractional works
OncologyPulmonary and Respiratory MedicineOrganic ChemistryNeurology4 others

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

  1. 1 Pancreatic and Hepatic Oncology Research Oncology 19 works
  2. 2 Gastric Cancer Management and Outcomes Pulmonary and Respiratory Medicine 17 works
  3. 3 Cancer Immunotherapy and Biomarkers Oncology 13 works
  4. 4 Catalytic C–H Functionalization Methods Organic Chemistry 13 works
  5. 5 Long-Term Effects of COVID-19 Neurology 13 works
  6. 6 Photosynthetic Processes and Mechanisms Molecular Biology 13 works
  7. 7 Fluid Dynamics and Turbulent Flows Computational Mechanics 13 works
  8. 8 Radical Photochemical Reactions Organic Chemistry 12 works
  9. 9 Esophageal Cancer Research and Treatment Surgery 12 works
  10. 10 Soft Robotics and Applications Biomedical Engineering 12 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 available48.1%not open51.9%

World: 28% of research is openly available.

with international co-authors10.2%domestic only89.8%

World: 19% is written across borders.

How has Okayama University's research output changed?

Output in 2018–2022 was 0% higher 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 Okayama

All research institutions in Okayama

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.