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Research facility · Okayama · Japan

Okayama Prefecture

In research, Okayama Prefecture stands highest in Medicine (#5,736 of 8,541 worldwide) and Health Sciences (#7,374 of 9,902 worldwide), 2022-now.

pref.okayama.jpROR OpenAlex
World rank, 2022-now
#15,236
of 22,385 · #17,927 all time
Rank in Japan
#448
of 924
Research works
826
▲ 23% vs 2018-21
Citations
8.8k
10.7 per fractional work
Top-10% rate
6.3%
all institutions 10.0%
vs its own fields
0.93×
1.00× is exactly expected
Open access
59%
world 40%
International
11%
world 18%
Okayama Prefecture

What is Okayama Prefecture 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
MedicineField #5,736 of 8,541 4.5%63 #10978
Health SciencesDomain #7,374 of 9,902 5.0%66 #13182

Each strip is that field's whole ranked pool, with the notch where Okayama Prefecture 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 Okayama Prefecture work in?

In 2022-now, 52% of research at Okayama Prefecture is in Health Sciences, 23% in Physical Sciences. Its largest fields are Medicine (49%), Agricultural and Biological Sciences (9%), Engineering (7%). It does 2.1× the world's share of Health Sciences.

Health Sciences: 71 fractional works · 51.9% of its workMedicine: 68 fractional works · 49.0% of its workSurgery: 12 fractional works · 8.8% of its workPulmonary and Respiratory Medicine: 8 fractional works · 5.8% of its workEpidemiology: 5 fractional works · 3.9% of its workCardiology and Cardiovascular Medicine: 4 fractional works · 3.1% of its workOncology: 4 fractional works · 2.6% of its workPublic Health, Environmental and Occupational Health: 3 fractional works · 2.4% of its workInfectious Diseases: 3 fractional works · 2.2% of its workHepatology: 3 fractional works · 1.9% of its workPhysiology: 2 fractional works · 1.6% of its workNephrology: 2 fractional works · 1.6% of its workPediatrics, Perinatology and Child Health: 2 fractional works · 1.5% of its workPathology and Forensic Medicine: 2 fractional works · 1.5% of its workNeurology: 2 fractional works · 1.4% of its workPharmacology: 2 fractional works · 1.3% of its workEndocrinology, Diabetes and Metabolism: 2 fractional works · 1.1% of its workGenetics: 1 fractional works · 1.1% of its workRadiology, Nuclear Medicine and Imaging: 1 fractional works · 1.0% of its workHematology: 1 fractional works · 0.9% of its workRheumatology: 1 fractional works · 0.8% of its workGastroenterology: 1 fractional works · 0.6% of its workObstetrics and Gynecology: 1 fractional works · 0.6% of its workInternal Medicine: 1 fractional works · 0.5% of its workDermatology: 1 fractional works · 0.4% of its workTransplantation: 1 fractional works · 0.4% of its workPsychiatry and Mental health: 0 fractional works · 0.3% of its workReproductive Medicine: 0 fractional works · 0.3% of its workEmergency Medicine: 0 fractional works · 0.3% of its workOrthopedics and Sports Medicine: 0 fractional works · 0.2% of its workCritical Care and Intensive Care Medicine: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.8% of its workHealth Professions: 2 fractional works · 1.6% of its workEmergency Medical Services: 1 fractional works · 0.7% of its workGeneral Health Professions: 1 fractional works · 0.5% of its workSpeech and Hearing: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.2% of its workDentistry: 1 fractional works · 0.5% of its workOral Surgery: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.3% of its workNursing: 1 fractional works · 0.5% of its workNutrition and Dietetics: 0 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.2% of its workVeterinary: 0 fractional works · 0.2% of its workPhysical Sciences: 32 fractional works · 23.2% of its workEngineering: 10 fractional works · 7.1% of its workMechanical Engineering: 2 fractional works · 1.4% of its workElectrical and Electronic Engineering: 2 fractional works · 1.4% of its workBiomedical Engineering: 2 fractional works · 1.2% of its workCivil and Structural Engineering: 1 fractional works · 0.8% of its workControl and Systems Engineering: 1 fractional works · 0.8% of its workMechanics of Materials: 1 fractional works · 0.5% of its workAerospace Engineering: 1 fractional works · 0.5% of its workAutomotive Engineering: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.2% of its workEnvironmental Science: 7 fractional works · 5.2% of its workEcology: 4 fractional works · 3.0% of its workEnvironmental Chemistry: 1 fractional works · 0.6% of its workNature and Landscape Conservation: 1 fractional works · 0.4% of its workGlobal and Planetary Change: 1 fractional works · 0.4% of its workEnvironmental Engineering: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.6% of its workMaterials Science: 5 fractional works · 3.6% of its workBiomaterials: 3 fractional works · 2.2% of its workMaterials Chemistry: 1 fractional works · 0.7% of its workElectronic, Optical and Magnetic Materials: 1 fractional works · 0.4% of its workPolymers and Plastics: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.0% of its workEarth and Planetary Sciences: 4 fractional works · 2.9% of its workOceanography: 2 fractional works · 1.7% of its workPaleontology: 1 fractional works · 0.5% of its workAtmospheric Science: 0 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.4% of its workMathematics: 2 fractional works · 1.3% of its workComputational Mathematics: 1 fractional works · 0.7% of its workApplied Mathematics: 0 fractional works · 0.4% of its workSmaller subfields together: 0 fractional works · 0.2% of its workComputer Science: 2 fractional works · 1.2% of its workComputer Vision and Pattern Recognition: 0 fractional works · 0.3% of its workInformation Systems: 0 fractional works · 0.3% of its workComputer Science Applications: 0 fractional works · 0.2% of its workArtificial Intelligence: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workPhysics and Astronomy: 1 fractional works · 1.1% of its workStatistical and Nonlinear Physics: 1 fractional works · 0.7% of its workSmaller subfields together: 0 fractional works · 0.4% of its workChemistry: 1 fractional works · 0.6% of its workOrganic Chemistry: 1 fractional works · 0.4% of its workSmaller subfields together: 0 fractional works · 0.2% of its workEnergy: 0 fractional works · 0.2% of its workLife Sciences: 25 fractional works · 18.5% of its workAgricultural and Biological Sciences: 13 fractional works · 9.4% of its workEcology, Evolution, Behavior and Systematics: 5 fractional works · 3.5% of its workInsect Science: 3 fractional works · 2.5% of its workPlant Science: 2 fractional works · 1.4% of its workAnimal Science and Zoology: 1 fractional works · 0.9% of its workFood Science: 1 fractional works · 0.7% of its workAquatic Science: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.2% of its workBiochemistry, Genetics and Molecular Biology: 7 fractional works · 5.2% of its workMolecular Biology: 4 fractional works · 2.8% of its workCancer Research: 1 fractional works · 0.6% of its workGenetics: 1 fractional works · 0.6% of its workBiotechnology: 1 fractional works · 0.4% of its workCell Biology: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.5% of its workNeuroscience: 2 fractional works · 1.5% of its workCellular and Molecular Neuroscience: 1 fractional works · 0.8% of its workBiological Psychiatry: 0 fractional works · 0.3% of its workCognitive Neuroscience: 0 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workPharmacology, Toxicology and Pharmaceutics: 2 fractional works · 1.3% of its workPharmacology: 1 fractional works · 0.9% of its workToxicology: 0 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workImmunology and Microbiology: 1 fractional works · 1.0% of its workImmunology: 1 fractional works · 0.7% of its workSmaller subfields together: 0 fractional works · 0.3% of its workSocial Sciences: 9 fractional works · 6.5% of its workSocial Sciences: 4 fractional works · 3.3% of its workSociology and Political Science: 2 fractional works · 1.1% of its workTransportation: 1 fractional works · 0.5% of its workEducation: 1 fractional works · 0.5% of its workSafety Research: 1 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.7% of its workPsychology: 3 fractional works · 1.9% of its workClinical Psychology: 1 fractional works · 0.9% of its workSocial Psychology: 1 fractional works · 0.6% of its workExperimental and Cognitive Psychology: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.2% of its workBusiness, Management and Accounting: 1 fractional works · 0.7% of its workOrganizational Behavior and Human Resource Management: 0 fractional works · 0.3% of its workStrategy and Management: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workDecision Sciences: 1 fractional works · 0.5% of its workStatistics, Probability and Uncertainty: 1 fractional works · 0.5% of its workEconomics, Econometrics and Finance: 0 fractional works · 0.1% of its workArts and Humanities: 0 fractional works · 0.1% of its workALL ITS WORKOkayamaPrefecture138fractional works, 2022-now
Life Sciences18%Physical Sciences23%Health Sciences52%Social Sciences6%

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 25 fields, with their numbers
    1. Medicine6849.0%
    2. Health Professions21.6%
    3. Dentistry10.5%
    4. Nursing10.5%
    5. Veterinary00.2%
    1. Engineering107.1%
    2. Environmental Science75.2%
    3. Materials Science53.6%
    4. Earth and Planetary Sciences42.9%
    5. Mathematics21.3%
    6. Computer Science21.2%
    7. Physics and Astronomy11.1%
    8. Chemistry10.6%
    9. Energy00.2%
    1. Agricultural and Biological Sciences139.4%
    2. Biochemistry, Genetics and Molecular Biology75.2%
    3. Neuroscience21.5%
    4. Pharmacology, Toxicology and Pharmaceutics21.3%
    5. Immunology and Microbiology11.0%
    1. Social Sciences43.3%
    2. Psychology31.9%
    3. Business, Management and Accounting10.7%
    4. Decision Sciences10.5%
    5. Economics, Econometrics and Finance00.1%
    6. Arts and Humanities00.1%
All of science, and how each field's share has moved since 1950: the Science domain explorer

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: 1.99× its world share, 13 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.98× its world share, 7 worksBiochemistry, Geneti…Immunology and Microbiology: 0.99× its world share, 1 worksImmunology and Micro…Neuroscience: 0.93× its world share, 2 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 3.65× its world share, 2 worksPharmacology, Toxico…Chemistry: 0.39× its world share, 1 worksChemistryComputer Science: 0.15× its world share, 2 worksComputer ScienceEarth and Planetary Sciences: 1.85× its world share, 4 worksEarth and Planetary …Energy: 0.18× its world share, 0 worksEnergyEngineering: 0.47× its world share, 10 worksEngineeringEnvironmental Science: 1.04× its world share, 7 worksEnvironmental ScienceMaterials Science: 1.04× its world share, 5 worksMaterials ScienceMathematics: 1.13× its world share, 2 worksMathematicsPhysics and Astronomy: 0.49× its world share, 2 worksPhysics and AstronomyDentistry: 1.04× its world share, 1 worksDentistryHealth Professions: 0.62× its world share, 2 worksHealth ProfessionsMedicine: 2.55× its world share, 68 worksMedicineNursing: 1.01× its world share, 1 worksNursingVeterinary: 1.42× its world share, 0 worksVeterinaryArts and Humanities: 0.02× its world share, 0 worksArts and HumanitiesBusiness, Management and Accounting: 0.21× its world share, 1 worksBusiness, Management…Decision Sciences: 0.50× its world share, 1 worksDecision SciencesEconomics, Econometrics and Finance: 0.06× its world share, 0 worksEconomics, Econometr…Psychology: 0.61× its world share, 3 worksPsychologySocial Sciences: 0.26× its world share, 4 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Pharmacology, Toxicology and Pharmaceutics, 3.6×. Every wedge is a field page.

All 25 fields, with their numbers
  1. Pharmacology, Toxicology and Pharmaceutics3.65×2 works
  2. Medicine2.55×68 works
  3. Agricultural and Biological Sciences1.99×13 works
  4. Earth and Planetary Sciences1.85×4 works
  5. Veterinary1.42×0 works
  6. Mathematics1.13×2 works
  7. Environmental Science1.04×7 works
  8. Materials Science1.04×5 works
  9. Dentistry1.04×1 works
  10. Nursing1.01×1 works
  11. Immunology and Microbiology0.99×1 works
  12. Biochemistry, Genetics and Molecular Biology0.98×7 works
  13. Neuroscience0.93×2 works
  14. Health Professions0.62×2 works
  15. Psychology0.61×3 works
  16. Decision Sciences0.50×1 works
  17. Physics and Astronomy0.49×2 works
  18. Engineering0.47×10 works
  19. Chemistry0.39×1 works
  20. Social Sciences0.26×4 works
  21. Business, Management and Accounting0.21×1 works
  22. Energy0.18×0 works
  23. Computer Science0.15×2 works
  24. Economics, Econometrics and Finance0.06×0 works
  25. Arts and Humanities0.02×0 works

Who are the top researchers at Okayama Prefecture?

Ranked on the quality score, Yusuke Namba, Satiyo Arakawa and Koji Tokioka lead among researchers whose main affiliation is Okayama Prefecture.

  1. 1 Yusuke Namba Japan · #3,352,507 worldwide 416 citations · 20 works
  2. 2 Satiyo Arakawa Japan · #3,816,050 worldwide 19 citations · 48 works
  3. 3 Koji Tokioka Japan · #4,048,662 worldwide 244 citations · 26 works
  4. 4 Ayano Oonishi Japan · #4,066,052 worldwide 199 citations · 18 works
  5. 5 Tsuyoshi Murao Japan · #5,423,446 worldwide 124 citations · 15 works
  6. 6 Akiko Wakuta Japan · #5,439,787 worldwide 370 citations · 42 works
  7. 7 Eiji Ishibashi Japan · #5,468,356 worldwide 178 citations · 16 works
  8. 8 Yutaka Iguchi Japan · #5,528,141 worldwide 232 citations · 37 works
  9. 9 Noriyuki Ueki Japan · #5,558,454 worldwide 195 citations · 18 works
  10. 9 Tadashi Oda Japan · #5,558,454 worldwide 80 citations · 18 works
All ranked researchers at Okayama Prefecture

What are the most cited papers from Okayama Prefecture?

The most cited paper from Okayama Prefecture is "Management of Hepatocellular Carcinoma in Japan: JSH Consensus Statements and Recommendations 2021 Update" (Masatoshi Kudo et al., 2021), with 689 citations. Next come "Effects of moderate-intensity endurance and high-intensity intermittent training on anaerobic capacity and ??VO2max" (689) and "Arabidopsis TERMINAL FLOWER1 Is Involved in the Regulation of Flowering Time and Inflorescence Development through Transcriptional Repression" (438).

Most cited papers
#PaperReleasedCitations
1 Management of Hepatocellular Carcinoma in Japan: JSH Consensus Statements and Recommendations 2021 Update Masatoshi Kudo et al. · Liver Cancer Open access 2021 689
2 Effects of moderate-intensity endurance and high-intensity intermittent training on anaerobic capacity and ??VO2max Izumi Tabata, Kouji Nishimura, Motoki Kouzaki et al. · Medicine & Science in Sports & Exercise Oct 1996 689
3 Arabidopsis TERMINAL FLOWER1 Is Involved in the Regulation of Flowering Time and Inflorescence Development through Transcriptional Repression Shigeru Hanano, Koji Goto · The Plant Cell Open access Sep 2011 438
4 Plaque assay and primary isolation of influenza a viruses in an established line of canine kidney cells (MDCK) in the presence of trypsin K. Tobita, Akira Sugiura, Chikashi ENOMOTO et al. · Medical Microbiology and Immunology Dec 1975 408
5 Validation of Modified ALBI Grade for More Detailed Assessment of Hepatic Function in Hepatocellular Carcinoma Patients: A Multicenter Analysis Atsushi Hiraoka, Takashi Kumada, Kunihiko Tsuji et al. · Liver Cancer Open access 11 Jun 2018 256
All 61 most cited papers, with filters and sorting

Which keywords describe research at Okayama Prefecture?

By fractional works in 2022-now, weighted toward what it does more of than the world: Epidemiology, Invasive Species, Diagnosis, Treatment, Infection, Biodiversity, Biogeography and Clinical Practice Guidelines.

▲ 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. Epidemiology12▲ 2.2×64 topics
  2. Treatment7▲ 4.0×24 topics
  3. Diagnosis6▲ 5.0×21 topics
  4. Invasive Species6▲ 11×10 topics
  5. Biodiversity5▲ 5.0×8 topics
  6. Inflammation5▲ 1.75×31 topics
  7. Infection5▲ 14×6 topics
  8. Management5▲ 4.4×17 topics
  9. Clinical Practice Guidelines5▲ 6.0×10 topics
  10. Biogeography4▲ 11×6 topics
  11. Cancer4▲ 1.94×19 topics
  12. Cardiovascular Disease3▲ 2.1×19 topics
  13. Environmental Monitoring3▲ 6.1×3 topics
  14. Hepatocellular Carcinoma3▲ 11×3 topics
  15. Nematodes3▲ 47×3 topics
  16. Self-Assembly3▲ 6.9×3 topics
  17. Biomimetic Synthesis3▲ 115×1 topic
  18. Parasitism3▲ 206×1 topic
  19. Peptide-Directed Materials3▲ 115×1 topic
  20. Snails3▲ 206×1 topic
  21. Taxonomy3▲ 15×7 topics
  22. Phylogenetic Analysis3▲ 6.6×7 topics
  23. Chemotherapy3▲ 2.8×15 topics
  24. Guidelines3▲ 4.2×10 topics
  25. Pathogenesis3▲ 3.8×13 topics
  26. Prognostic Factors3▲ 4.4×12 topics
  27. Ecosystem Functioning2▲ 8.8×4 topics
  28. Phylogeny2▲ 11×8 topics
  29. Surgical Management2▲ 4.3×10 topics
  30. Biomonitoring2▲ 20×3 topics
  31. Radiofrequency Ablation2▲ 14×2 topics
  32. Chronic Kidney Disease2▲ 5.7×5 topics
  33. Prenatal Diagnosis2▲ 10.0×4 topics
  34. Fibrosis2▲ 7.1×6 topics
  35. DNA Barcoding2▲ 7.6×5 topics
  36. Conservation Genetics2▲ 30×2 topics
  37. Ecology2▲ 7.3×3 topics
  38. Liver Cancer2▲ 22×1 topic
  39. Sorafenib2▲ 22×1 topic
  40. Survival2▲ 9.0×3 topics

Which research topics does Okayama Prefecture publish most on?

By volume in 2022-now: Diatoms and Algae Research, Mollusks and Parasites Studies, Hepatocellular Carcinoma Treatment and Prognosis and Aquatic Invertebrate Ecology and Behavior.

Diatoms and Algae Research: 3 fractional worksMollusks and Parasites Studies: 3 fractional worksHepatocellular Carcinoma Treatment and Prognosis: 2 fractional worksAquatic Invertebrate Ecology and Behavior: 1 fractional worksTracheal and airway disorders: 1 fractional worksLiver Disease Diagnosis and Treatment: 1 fractional worksChronic Kidney Disease a…1Chronic Kidney Disease and Diabetes: 1 fractional worksFreshwater macroinvertebrate diversity and ecology: 1 fractional worksMarine Biology and Ecology Research: 1 fractional worksLichen and fungal ecology: 1 fractional works
BiomaterialsInsect ScienceHepatologyEcology5 others

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

  1. 1 Diatoms and Algae Research Biomaterials 3 works
  2. 2 Mollusks and Parasites Studies Insect Science 3 works
  3. 3 Hepatocellular Carcinoma Treatment and Prognosis Hepatology 2 works
  4. 4 Aquatic Invertebrate Ecology and Behavior Ecology 1 works
  5. 5 Tracheal and airway disorders Pulmonary and Respiratory Medicine 1 works
  6. 6 Liver Disease Diagnosis and Treatment Epidemiology 1 works
  7. 7 Chronic Kidney Disease and Diabetes Nephrology 1 works
  8. 8 Freshwater macroinvertebrate diversity and ecology Ecology 1 works
  9. 9 Marine Biology and Ecology Research Oceanography 1 works
  10. 10 Lichen and fungal ecology Ecology, Evolution, Behavior and Systematics 1 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 available58.6%not open41.4%

World: 40% of research is openly available.

with international co-authors11.0%domestic only89.0%

World: 18% is written across borders.

How has Okayama Prefecture's research output changed?

Output in 2022-2025 was 23% higher 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 Okayama Prefecture as a percentage of every work published that year, 0.00048% in 2024.

still counting0.0020%0.0040%Okayama Prefecture0.00078% in 202519801990200020102020

Fractional works of Okayama Prefecture 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 2025Okayama Prefecture6.4% in 202520102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 7.8% in 2023.

Other research institutions in Okayama

All research institutions in Okayama

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Okayama Prefecture on Science Explorer

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