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Hospital / health system · Kurume · Japan

Koga Hospital

In research, Koga Hospital stands highest in Medicine (#6,160 of 8,541 worldwide) and Health Sciences (#7,398 of 9,902 worldwide), 2022-now. Relative to its size it is most specialised in Surgery (Surgery is 7.0× its share of world research).

tenjinkai.or.jp/koga21ROR OpenAlex
World rank, 2022-now
#19,343
of 22,385 · #24,808 all time
Rank in Japan
#638
of 924
Research works
648
▲ 43% vs 2018-21
Citations
6.1k
9.4 per fractional work
Top-10% rate
4.7%
all institutions 10.0%
vs its own fields
0.89×
1.00× is exactly expected
Open access
49%
world 40%
International
8%
world 18%
Koga Hospital

What is Koga Hospital 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 #6,160 of 8,541 2.9%94 #9180
Health SciencesDomain #7,398 of 9,902 3.0%98 #11002

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

In 2022-now, 81% of research at Koga Hospital is in Health Sciences, 8% in Social Sciences. Its largest fields are Medicine (77%), Biochemistry, Genetics and Molecular Biology (5%), Social Sciences (3%). It does 3.3× the world's share of Health Sciences.

Health Sciences: 111 fractional works · 80.6% of its workMedicine: 106 fractional works · 77.2% of its workSurgery: 22 fractional works · 16.4% of its workPulmonary and Respiratory Medicine: 14 fractional works · 10.3% of its workCardiology and Cardiovascular Medicine: 13 fractional works · 9.2% of its workEpidemiology: 6 fractional works · 4.6% of its workEndocrinology, Diabetes and Metabolism: 5 fractional works · 3.5% of its workPhysiology: 4 fractional works · 3.2% of its workRadiology, Nuclear Medicine and Imaging: 4 fractional works · 3.1% of its workOncology: 4 fractional works · 2.6% of its workRheumatology: 3 fractional works · 2.4% of its workPathology and Forensic Medicine: 3 fractional works · 2.3% of its workNeurology: 3 fractional works · 2.3% of its workHealth Informatics: 3 fractional works · 2.2% of its workInfectious Diseases: 3 fractional works · 1.9% of its workPublic Health, Environmental and Occupational Health: 2 fractional works · 1.5% of its workRehabilitation: 2 fractional works · 1.1% of its workGenetics: 2 fractional works · 1.1% of its workPediatrics, Perinatology and Child Health: 1 fractional works · 1.0% of its workHematology: 1 fractional works · 0.8% of its workEmergency Medicine: 1 fractional works · 0.7% of its workComplementary and alternative medicine: 1 fractional works · 0.7% of its workDermatology: 1 fractional works · 0.7% of its workObstetrics and Gynecology: 1 fractional works · 0.6% of its workOtorhinolaryngology: 1 fractional works · 0.6% of its workOrthopedics and Sports Medicine: 1 fractional works · 0.6% of its workHepatology: 1 fractional works · 0.5% of its workPharmacology: 1 fractional works · 0.5% of its workPsychiatry and Mental health: 1 fractional works · 0.5% of its workMicrobiology: 0 fractional works · 0.4% of its workInternal Medicine: 0 fractional works · 0.3% of its workGastroenterology: 0 fractional works · 0.3% of its workGeriatrics and Gerontology: 0 fractional works · 0.3% of its workOphthalmology: 0 fractional works · 0.2% of its workReproductive Medicine: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.9% of its workHealth Professions: 3 fractional works · 2.4% of its workGeneral Health Professions: 1 fractional works · 0.7% of its workPhysical Therapy, Sports Therapy and Rehabilitation: 1 fractional works · 0.5% of its workMedical Laboratory Technology: 0 fractional works · 0.3% of its workMedical Terminology: 0 fractional works · 0.2% of its workSpeech and Hearing: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.5% of its workVeterinary: 1 fractional works · 0.8% of its workSmall Animals: 1 fractional works · 0.6% of its workEquine: 0 fractional works · 0.2% of its workDentistry: 0 fractional works · 0.1% of its workNursing: 0 fractional works · 0.1% of its workSocial Sciences: 11 fractional works · 8.2% of its workSocial Sciences: 5 fractional works · 3.4% of its workEducation: 1 fractional works · 0.9% of its workSociology and Political Science: 1 fractional works · 0.8% of its workGender Studies: 0 fractional works · 0.4% of its workGeography, Planning and Development: 0 fractional works · 0.4% of its workPublic Administration: 0 fractional works · 0.2% of its workSafety Research: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.5% of its workPsychology: 2 fractional works · 1.8% of its workSocial Psychology: 1 fractional works · 0.8% of its workApplied Psychology: 0 fractional works · 0.3% of its workClinical Psychology: 0 fractional works · 0.2% of its workExperimental and Cognitive Psychology: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.2% of its workArts and Humanities: 2 fractional works · 1.5% of its workHistory and Philosophy of Science: 1 fractional works · 0.7% of its workLiterature and Literary Theory: 1 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.3% of its workDecision Sciences: 2 fractional works · 1.2% of its workInformation Systems and Management: 1 fractional works · 0.7% of its workStatistics, Probability and Uncertainty: 0 fractional works · 0.4% of its workSmaller subfields together: 0 fractional works · 0.1% of its workEconomics, Econometrics and Finance: 0 fractional works · 0.2% of its workBusiness, Management and Accounting: 0 fractional works · 0.1% of its workLife Sciences: 11 fractional works · 7.7% of its workBiochemistry, Genetics and Molecular Biology: 6 fractional works · 4.6% of its workGenetics: 3 fractional works · 2.3% of its workMolecular Biology: 2 fractional works · 1.7% of its workCancer Research: 0 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.4% of its workImmunology and Microbiology: 2 fractional works · 1.4% of its workImmunology: 1 fractional works · 0.8% of its workMicrobiology: 1 fractional works · 0.6% of its workSmaller subfields together: 0 fractional works · 0.1% of its workNeuroscience: 1 fractional works · 0.6% of its workCellular and Molecular Neuroscience: 0 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.3% of its workAgricultural and Biological Sciences: 1 fractional works · 0.5% of its workPharmacology, Toxicology and Pharmaceutics: 1 fractional works · 0.5% of its workPharmacology: 1 fractional works · 0.5% of its workPhysical Sciences: 5 fractional works · 3.5% of its workComputer Science: 3 fractional works · 1.8% of its workArtificial Intelligence: 1 fractional works · 1.0% of its workInformation Systems: 1 fractional works · 0.6% of its workSmaller subfields together: 0 fractional works · 0.2% of its workEngineering: 1 fractional works · 0.7% of its workBiomedical Engineering: 1 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.3% of its workEnvironmental Science: 1 fractional works · 0.4% of its workMathematics: 0 fractional works · 0.2% of its workPhysics and Astronomy: 0 fractional works · 0.2% of its workEnergy: 0 fractional works · 0.1% of its workChemistry: 0 fractional works · 0.1% of its workEarth and Planetary Sciences: 0 fractional works · 0.1% of its workALL ITS WORKKoga Hospital138fractional works, 2022-now
Life Sciences8%Physical Sciences4%Health Sciences81%Social Sciences8%

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 24 fields, with their numbers
    1. Medicine10677.2%
    2. Health Professions32.4%
    3. Veterinary10.8%
    4. Dentistry00.1%
    5. Nursing00.1%
    1. Social Sciences53.4%
    2. Psychology21.8%
    3. Arts and Humanities21.5%
    4. Decision Sciences21.2%
    5. Economics, Econometrics and Finance00.2%
    6. Business, Management and Accounting00.1%
    1. Biochemistry, Genetics and Molecular Biology64.6%
    2. Immunology and Microbiology21.4%
    3. Neuroscience10.6%
    4. Agricultural and Biological Sciences10.5%
    5. Pharmacology, Toxicology and Pharmaceutics10.5%
    1. Computer Science31.8%
    2. Engineering10.7%
    3. Environmental Science10.4%
    4. Mathematics00.2%
    5. Physics and Astronomy00.2%
    6. Energy00.1%
    7. Chemistry00.1%
    8. Earth and Planetary Sciences00.1%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does Koga Hospital specialise in?

Where its research is concentrated relative to its size: Surgery takes 7.0× the share of its output that it takes of world research.

  1. SurgerySubfield · 22.5 works7.0×
← 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: 0.11× its world share, 1 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.87× its world share, 6 worksBiochemistry, Geneti…Immunology and Microbiology: 1.40× its world share, 2 worksImmunology and Micro…Neuroscience: 0.38× its world share, 1 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.38× its world share, 1 worksPharmacology, Toxico…Chemistry: 0.04× its world share, 0 worksChemistryComputer Science: 0.24× its world share, 2 worksComputer ScienceEarth and Planetary Sciences: 0.04× its world share, 0 worksEarth and Planetary …Energy: 0.09× its world share, 0 worksEnergyEngineering: 0.05× its world share, 1 worksEngineeringEnvironmental Science: 0.09× its world share, 1 worksEnvironmental ScienceMathematics: 0.15× its world share, 0 worksMathematicsPhysics and Astronomy: 0.08× its world share, 0 worksPhysics and AstronomyDentistry: 0.20× its world share, 0 worksDentistryHealth Professions: 0.92× its world share, 3 worksHealth ProfessionsMedicine: 4.01× its world share, 106 worksMedicineNursing: 0.12× its world share, 0 worksNursingVeterinary: 5.95× its world share, 1 worksVeterinaryArts and Humanities: 0.51× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.03× its world share, 0 worksBusiness, Management…Decision Sciences: 1.20× its world share, 2 worksDecision SciencesEconomics, Econometrics and Finance: 0.11× its world share, 0 worksEconomics, Econometr…Psychology: 0.60× its world share, 2 worksPsychologySocial Sciences: 0.27× its world share, 5 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Veterinary, 6.0×. Every wedge is a field page.

All 24 fields, with their numbers
  1. Veterinary5.95×1 works
  2. Medicine4.01×106 works
  3. Immunology and Microbiology1.40×2 works
  4. Pharmacology, Toxicology and Pharmaceutics1.38×1 works
  5. Decision Sciences1.20×2 works
  6. Health Professions0.92×3 works
  7. Biochemistry, Genetics and Molecular Biology0.87×6 works
  8. Psychology0.60×2 works
  9. Arts and Humanities0.51×2 works
  10. Neuroscience0.38×1 works
  11. Social Sciences0.27×5 works
  12. Computer Science0.24×2 works
  13. Dentistry0.20×0 works
  14. Mathematics0.15×0 works
  15. Nursing0.12×0 works
  16. Agricultural and Biological Sciences0.11×1 works
  17. Economics, Econometrics and Finance0.11×0 works
  18. Energy0.09×0 works
  19. Environmental Science0.09×1 works
  20. Physics and Astronomy0.08×0 works
  21. Engineering0.05×1 works
  22. Chemistry0.04×0 works
  23. Earth and Planetary Sciences0.04×0 works
  24. Business, Management and Accounting0.03×0 works

Who are the top researchers at Koga Hospital?

Ranked on the quality score, Tomohiro Kawasaki, Reiji Ochiai and Yoshiaki Shintani lead among researchers whose main affiliation is Koga Hospital.

  1. 1 Tomohiro Kawasaki Japan · #747,940 worldwide 6.4k citations · 254 works
  2. 2 Reiji Ochiai Japan · #1,702,287 worldwide 1.1k citations · 15 works
  3. 3 Yoshiaki Shintani Japan · #2,265,854 worldwide 2.1k citations · 110 works
  4. 4 Taichi Okonogi Japan · #2,937,937 worldwide 207 citations · 19 works
  5. 5 Takashi Takao Japan · #3,592,321 worldwide 586 citations · 97 works
  6. 6 Kiyokazu Koga Japan · #3,644,358 worldwide 349 citations · 25 works
  7. 7 Shoichi Akazawa Japan · #3,860,489 worldwide 690 citations · 29 works
  8. 8 Mokichi Nogaki Japan · #4,073,576 worldwide 165 citations · 28 works
  9. 9 Junichi Omagari Japan · #4,458,017 worldwide 481 citations · 25 works
  10. 10 N. Koga Japan · #4,701,062 worldwide 281 citations · 30 works
All ranked researchers at Koga Hospital

What are the most cited papers from Koga Hospital?

The most cited paper from Koga Hospital is "Diffusion-weighted whole-body imaging with background body signal suppression (DWIBS): features and potential applications in oncology" (Thomas Christian Kwee, Taro Takahara, Reiji Ochiai et al., 2008), with 411 citations. Next come "Expression of Cyclooxygenase–2 in Human Hepatocellular Carcinoma: Relevance to Tumor Dedifferentiation" (402) and "Prognostic impact of spontaneous coronary artery dissection in young female patients with acute myocardial infarction: A report from the Angina Pectoris–Myocardial Infarction Multicenter Investigators in Japan" (357).

Most cited papers
#PaperReleasedCitations
1 Diffusion-weighted whole-body imaging with background body signal suppression (DWIBS): features and potential applications in oncology Thomas Christian Kwee, Taro Takahara, Reiji Ochiai et al. · European Radiology Open access 29 Apr 2008 411
2 Expression of Cyclooxygenase–2 in Human Hepatocellular Carcinoma: Relevance to Tumor Dedifferentiation Hironori Koga, Shotaro Sakisaka, Masahito Ohishi et al. · Hepatology Open access Mar 1999 402
3 Prognostic impact of spontaneous coronary artery dissection in young female patients with acute myocardial infarction: A report from the Angina Pectoris–Myocardial Infarction Multicenter Investigators in Japan Takahiro Nakashima, Teruo Noguchi, Seiichi Haruta et al. · International Journal of Cardiology Open access 15 Jan 2016 357
4 1-Year Impact on Medical Practice and Clinical Outcomes of FFRCT Manesh R. Patel et al. · JACC. Cardiovascular imaging Open access 17 Mar 2019 321
5 Real-world clinical utility and impact on clinical decision-making of coronary computed tomography angiography-derived fractional flow reserve: lessons from the ADVANCE Registry Timothy A. Fairbairn et al. · European Heart Journal Open access 9 Aug 2018 318
All 59 most cited papers, with filters and sorting

Which keywords describe research at Koga Hospital?

By fractional works in 2022-now, weighted toward what it does more of than the world: Epidemiology, Myocardial Infarction, Echocardiography, Diagnosis, Magnetic Resonance Imaging, Complications, Cardiac Imaging and Endovascular Repair.

▲ 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. Epidemiology16▲ 2.9×58 topics
  2. Myocardial Infarction7▲ 21×6 topics
  3. Diagnosis7▲ 5.1×22 topics
  4. Echocardiography6▲ 17×7 topics
  5. Treatment6▲ 3.6×25 topics
  6. Magnetic Resonance Imaging5▲ 15×4 topics
  7. Complications5▲ 7.2×11 topics
  8. Cardiac Imaging5▲ 28×3 topics
  9. Endovascular Repair4▲ 36×3 topics
  10. Risk Factors4▲ 2.8×14 topics
  11. Management4▲ 3.8×19 topics
  12. Healthcare4▲ 2.6×5 topics
  13. Precision Medicine4▲ 5.7×5 topics
  14. Autoimmunity4▲ 18×4 topics
  15. Prognostic Factors3▲ 5.8×13 topics
  16. Cardiovascular Risk Assessment3▲ 30×2 topics
  17. Medical Imaging3▲ 4.5×5 topics
  18. Type 1 Diabetes3▲ 28×2 topics
  19. Atherosclerosis3▲ 7.9×6 topics
  20. Coronary Artery Disease3▲ 19×3 topics
  21. Radiation Exposure3▲ 23×2 topics
  22. Surgical Management3▲ 5.5×9 topics
  23. Clinical Decision Support3▲ 14×1 topic
  24. Ethical Challenges3▲ 10×1 topic
  25. Computed Tomography Angiography3▲ 32×1 topic
  26. Myocardial Perfusion3▲ 32×1 topic
  27. Surgical Aortic-Valve Replacement3▲ 30×1 topic
  28. Transcatheter Aortic-Valve Replacement3▲ 30×1 topic
  29. Stroke Prevention3▲ 17×2 topics
  30. Cardiovascular Risk3▲ 6.3×5 topics
  31. Percutaneous Coronary Intervention3▲ 14×4 topics
  32. Coronary Stents2▲ 41×1 topic
  33. Diabetes Mellitus2▲ 8.7×4 topics
  34. Dilated Cardiomyopathy2▲ 27×2 topics
  35. Myocardial Revascularization2▲ 41×1 topic
  36. Aortic Aneurysm2▲ 27×2 topics
  37. Aortic Dissection2▲ 41×1 topic
  38. Bicuspid Aortic Valve2▲ 41×1 topic
  39. Surgical Repair2▲ 44×1 topic
  40. Ventricular Reconstruction2▲ 44×1 topic

Which research topics does Koga Hospital publish most on?

By volume in 2022-now: Artificial Intelligence in Healthcare and Education, Cardiac Valve Diseases and Treatments, Cardiac Imaging and Diagnostics and Coronary Interventions and Diagnostics.

Artificial Intelligence …3Artificial Intelligence in Healthcare and Education: 3 fractional worksCardiac Valve Diseases a…3Cardiac Valve Diseases and Treatments: 3 fractional worksCardiac Imaging and Diagnostics: 3 fractional worksCoronary Interventions and Diagnostics: 2 fractional worksAortic Disease and Treatment Approaches: 2 fractional worksCardiac Structural Anomalies and Repair: 2 fractional worksCerebrovascular and Carotid Artery Diseases: 2 fractional worksDiabetes and associated …2Diabetes and associated disorders: 2 fractional worksThyroid Disorders and Treatments: 2 fractional worksPancreatic function and diabetes: 2 fractional works
Health InformaticsCardiology and Cardiovascular MedicineRadiology, Nuclear Medicine and ImagingSurgery3 others

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

  1. 1 Artificial Intelligence in Healthcare and Education Health Informatics 3 works
  2. 2 Cardiac Valve Diseases and Treatments Cardiology and Cardiovascular Medicine 3 works
  3. 3 Cardiac Imaging and Diagnostics Radiology, Nuclear Medicine and Imaging 3 works
  4. 4 Coronary Interventions and Diagnostics Surgery 2 works
  5. 5 Aortic Disease and Treatment Approaches Pulmonary and Respiratory Medicine 2 works
  6. 6 Cardiac Structural Anomalies and Repair Surgery 2 works
  7. 7 Cerebrovascular and Carotid Artery Diseases Pulmonary and Respiratory Medicine 2 works
  8. 8 Diabetes and associated disorders Genetics 2 works
  9. 9 Thyroid Disorders and Treatments Endocrinology, Diabetes and Metabolism 2 works
  10. 10 Pancreatic function and diabetes Surgery 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 available49.2%not open50.8%

World: 40% of research is openly available.

with international co-authors7.6%domestic only92.4%

World: 18% is written across borders.

How has Koga Hospital's research output changed?

Output in 2022-2025 was 43% 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 Koga Hospital as a percentage of every work published that year, 0.00059% in 2024.

still counting0.0010%0.0020%Koga Hospital0.00064% in 202519801990200020102020

Fractional works of Koga Hospital 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 2025Koga Hospital3.2% in 202520102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 10.3% in 2018.

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Koga Hospital on Science Explorer

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