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Company · Tokyo · Japan

Eisai (Japan)

In research, Eisai (Japan) stands highest in Medicine (#6,467 of 8,541 worldwide), Health Sciences (#7,598 of 9,902 worldwide) and Life Sciences (#5,488 of 6,403 worldwide), 2022-now. Relative to its size it is most specialised in Oncology (Oncology is 8.1× its share of world research).

eisai.co.jpROR OpenAlex
World rank, 2022-now
#15,871
of 22,385 · #14,134 all time
Rank in Japan
#468
of 924
Research works
2.4k
▲ 10% vs 2018-21
Citations
59k
24.7 per fractional work
Top-10% rate
9.1%
all institutions 10.0%
vs its own fields
0.94×
1.00× is exactly expected
Open access
42%
world 40%
International
16%
world 18%
Eisai (Japan)

What is Eisai (Japan) 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 #6,467 of 8,541 12.0%90 #6542
Health SciencesDomain #7,598 of 9,902 11.9%93 #7273
Life SciencesDomain #5,488 of 6,403 8.1%70 #6656

Each strip is that field's whole ranked pool, with the notch where Eisai (Japan) 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 of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022-now. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Medicine#6,542 #6,467
  2. Health Sciences#7,273 #7,598
  3. Life Sciences#6,656 #5,488
all time2022-now, better2022-now, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

Which fields of science does Eisai (Japan) work in?

In 2022-now, 43% of research at Eisai (Japan) is in Health Sciences, 33% in Life Sciences. Its largest fields are Medicine (41%), Biochemistry, Genetics and Molecular Biology (16%), Neuroscience (10%). It does 2.4× the world's share of Life Sciences.

Health Sciences: 106 fractional works · 42.6% of its workMedicine: 103 fractional works · 41.4% of its workOncology: 23 fractional works · 9.1% of its workPsychiatry and Mental health: 12 fractional works · 4.8% of its workPhysiology: 11 fractional works · 4.3% of its workPulmonary and Respiratory Medicine: 7 fractional works · 2.8% of its workNeurology: 7 fractional works · 2.6% of its workEpidemiology: 6 fractional works · 2.4% of its workRadiology, Nuclear Medicine and Imaging: 6 fractional works · 2.4% of its workSurgery: 4 fractional works · 1.6% of its workPharmacology: 3 fractional works · 1.3% of its workPediatrics, Perinatology and Child Health: 3 fractional works · 1.2% of its workHepatology: 3 fractional works · 1.1% of its workPublic Health, Environmental and Occupational Health: 3 fractional works · 1.0% of its workPathology and Forensic Medicine: 2 fractional works · 0.9% of its workReproductive Medicine: 2 fractional works · 0.6% of its workInfectious Diseases: 1 fractional works · 0.6% of its workRheumatology: 1 fractional works · 0.6% of its workCardiology and Cardiovascular Medicine: 1 fractional works · 0.5% of its workGenetics: 1 fractional works · 0.5% of its workHematology: 1 fractional works · 0.5% of its workEndocrinology, Diabetes and Metabolism: 1 fractional works · 0.4% of its workCritical Care and Intensive Care Medicine: 1 fractional works · 0.3% of its workGeriatrics and Gerontology: 1 fractional works · 0.3% of its workNephrology: 1 fractional works · 0.2% of its workDermatology: 1 fractional works · 0.2% of its workSmaller subfields together: 2 fractional works · 1.0% of its workHealth Professions: 2 fractional works · 0.7% of its workGeneral Health Professions: 1 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.3% of its workVeterinary: 1 fractional works · 0.3% of its workSmall Animals: 1 fractional works · 0.3% of its workNursing: 0 fractional works · 0.1% of its workDentistry: 0 fractional works · 0.1% of its workLife Sciences: 83 fractional works · 33.3% of its workBiochemistry, Genetics and Molecular Biology: 41 fractional works · 16.4% of its workMolecular Biology: 29 fractional works · 11.7% of its workCancer Research: 7 fractional works · 2.8% of its workGenetics: 1 fractional works · 0.5% of its workBiochemistry: 1 fractional works · 0.4% of its workCell Biology: 1 fractional works · 0.4% of its workBiophysics: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workNeuroscience: 26 fractional works · 10.3% of its workCognitive Neuroscience: 13 fractional works · 5.4% of its workCellular and Molecular Neuroscience: 6 fractional works · 2.5% of its workNeurology: 4 fractional works · 1.4% of its workDevelopmental Neuroscience: 1 fractional works · 0.4% of its workEndocrine and Autonomic Systems: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workImmunology and Microbiology: 7 fractional works · 3.0% of its workImmunology: 6 fractional works · 2.6% of its workSmaller subfields together: 1 fractional works · 0.4% of its workPharmacology, Toxicology and Pharmaceutics: 5 fractional works · 2.1% of its workPharmacology: 4 fractional works · 1.5% of its workPharmaceutical Science: 1 fractional works · 0.6% of its workSmaller subfields together: 0 fractional works · 0.1% of its workAgricultural and Biological Sciences: 4 fractional works · 1.5% of its workPlant Science: 1 fractional works · 0.5% of its workAnimal Science and Zoology: 1 fractional works · 0.2% of its workGeneral Agricultural and Biological Sciences: 1 fractional works · 0.2% of its workEcology, Evolution, Behavior and Systematics: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.4% of its workSocial Sciences: 33 fractional works · 13.1% of its workPsychology: 17 fractional works · 6.6% of its workExperimental and Cognitive Psychology: 15 fractional works · 6.2% of its workSocial Psychology: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.2% of its workSocial Sciences: 9 fractional works · 3.5% of its workEducation: 3 fractional works · 1.3% of its workSociology and Political Science: 2 fractional works · 0.8% of its workDemography: 1 fractional works · 0.5% of its workLaw: 1 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.6% of its workEconomics, Econometrics and Finance: 4 fractional works · 1.7% of its workEconomics and Econometrics: 4 fractional works · 1.7% of its workBusiness, Management and Accounting: 2 fractional works · 0.7% of its workOrganizational Behavior and Human Resource Management: 1 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.4% of its workArts and Humanities: 1 fractional works · 0.3% of its workGeneral Arts and Humanities: 0 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workDecision Sciences: 0 fractional works · 0.2% of its workPhysical Sciences: 28 fractional works · 11.0% of its workComputer Science: 7 fractional works · 3.0% of its workComputational Theory and Mathematics: 6 fractional works · 2.3% of its workInformation Systems: 1 fractional works · 0.4% of its workArtificial Intelligence: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workEngineering: 7 fractional works · 3.0% of its workBiomedical Engineering: 2 fractional works · 0.6% of its workCivil and Structural Engineering: 1 fractional works · 0.5% of its workElectrical and Electronic Engineering: 1 fractional works · 0.4% of its workAerospace Engineering: 1 fractional works · 0.3% of its workMechanical Engineering: 1 fractional works · 0.3% of its workBuilding and Construction: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.6% of its workChemistry: 5 fractional works · 2.0% of its workOrganic Chemistry: 3 fractional works · 1.3% of its workSpectroscopy: 1 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.2% of its workMaterials Science: 3 fractional works · 1.1% of its workMaterials Chemistry: 1 fractional works · 0.5% of its workBiomaterials: 1 fractional works · 0.3% of its workElectronic, Optical and Magnetic Materials: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workEnvironmental Science: 2 fractional works · 0.8% of its workManagement, Monitoring, Policy and Law: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.6% of its workMathematics: 2 fractional works · 0.8% of its workStatistics and Probability: 2 fractional works · 0.8% of its workPhysics and Astronomy: 1 fractional works · 0.3% of its workEarth and Planetary Sciences: 0 fractional works · 0.1% of its workEnergy: 0 fractional works · 0.1% of its workChemical Engineering: 0 fractional works · 0.0% of its workALL ITS WORKEisai (Japan)249fractional works, 2022-now
Life Sciences33%Physical Sciences11%Health Sciences43%Social Sciences13%

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 26 fields, with their numbers
    1. Medicine10341.4%
    2. Health Professions20.7%
    3. Veterinary10.3%
    4. Nursing00.1%
    5. Dentistry00.1%
    1. Biochemistry, Genetics and Molecular Biology4116.4%
    2. Neuroscience2610.3%
    3. Immunology and Microbiology73.0%
    4. Pharmacology, Toxicology and Pharmaceutics52.1%
    5. Agricultural and Biological Sciences41.5%
    1. Psychology176.6%
    2. Social Sciences93.5%
    3. Economics, Econometrics and Finance41.7%
    4. Business, Management and Accounting20.7%
    5. Arts and Humanities10.3%
    6. Decision Sciences00.2%
    1. Computer Science73.0%
    2. Engineering73.0%
    3. Chemistry52.0%
    4. Materials Science31.1%
    5. Environmental Science20.8%
    6. Mathematics20.8%
    7. Physics and Astronomy10.3%
    8. Earth and Planetary Sciences00.1%
    9. Energy00.1%
    10. Chemical Engineering00.0%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does Eisai (Japan) specialise in?

Where its research is concentrated relative to its size: Oncology takes 8.1× the share of its output that it takes of world research.

  1. OncologySubfield · 22.6 works8.1×
← 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: 0.32× its world share, 4 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 3.07× its world share, 41 worksBiochemistry, Geneti…Immunology and Microbiology: 2.94× its world share, 7 worksImmunology and Micro…Neuroscience: 6.34× its world share, 26 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 6.00× its world share, 5 worksPharmacology, Toxico…Chemical Engineering: 0.10× its world share, 0 worksChemical EngineeringChemistry: 1.26× its world share, 5 worksChemistryComputer Science: 0.38× its world share, 8 worksComputer ScienceEarth and Planetary Sciences: 0.04× its world share, 0 worksEarth and Planetary …Energy: 0.07× its world share, 0 worksEnergyEngineering: 0.20× its world share, 7 worksEngineeringEnvironmental Science: 0.16× its world share, 2 worksEnvironmental ScienceMaterials Science: 0.30× its world share, 3 worksMaterials ScienceMathematics: 0.66× its world share, 2 worksMathematicsPhysics and Astronomy: 0.14× its world share, 1 worksPhysics and AstronomyDentistry: 0.14× its world share, 0 worksDentistryHealth Professions: 0.27× its world share, 2 worksHealth ProfessionsMedicine: 2.15× its world share, 103 worksMedicineNursing: 0.28× its world share, 0 worksNursingVeterinary: 2.31× its world share, 1 worksVeterinaryArts and Humanities: 0.09× its world share, 1 worksArts and HumanitiesBusiness, Management and Accounting: 0.23× its world share, 2 worksBusiness, Management…Decision Sciences: 0.19× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.82× its world share, 4 worksEconomics, Econometr…Psychology: 2.18× its world share, 17 worksPsychologySocial Sciences: 0.28× its world share, 9 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Neuroscience, 6.3×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Neuroscience6.34×26 works
  2. Pharmacology, Toxicology and Pharmaceutics6.00×5 works
  3. Biochemistry, Genetics and Molecular Biology3.07×41 works
  4. Immunology and Microbiology2.94×7 works
  5. Veterinary2.31×1 works
  6. Psychology2.18×17 works
  7. Medicine2.15×103 works
  8. Chemistry1.26×5 works
  9. Economics, Econometrics and Finance0.82×4 works
  10. Mathematics0.66×2 works
  11. Computer Science0.38×8 works
  12. Agricultural and Biological Sciences0.32×4 works
  13. Materials Science0.30×3 works
  14. Nursing0.28×0 works
  15. Social Sciences0.28×9 works
  16. Health Professions0.27×2 works
  17. Business, Management and Accounting0.23×2 works
  18. Engineering0.20×7 works
  19. Decision Sciences0.19×0 works
  20. Environmental Science0.16×2 works
  21. Physics and Astronomy0.14×1 works
  22. Dentistry0.14×0 works
  23. Chemical Engineering0.10×0 works
  24. Arts and Humanities0.09×1 works
  25. Energy0.07×0 works
  26. Earth and Planetary Sciences0.04×0 works

Who are the top researchers at Eisai (Japan)?

Ranked on the quality score, Takashi Owa, Yu Kato and Yasuhiro Funahashi lead among researchers whose main affiliation is Eisai (Japan).

  1. 1 Takashi Owa Japan · #299,854 worldwide 6.2k citations · 96 works
  2. 2 Yu Kato Japan · #486,069 worldwide 3.6k citations · 171 works
  3. 3 Yasuhiro Funahashi Japan · #531,016 worldwide 8.3k citations · 312 works
  4. 4 Junji Matsui Japan · #561,745 worldwide 9k citations · 194 works
  5. 5 Mai Uesugi Japan · #571,553 worldwide 2.6k citations · 43 works
  6. 6 Yukinori Minoshima Japan · #673,164 worldwide 3.2k citations · 172 works
  7. 7 Yoshiya Oda Japan · #673,198 worldwide 12k citations · 209 works
  8. 8 Toshiyuki Tamai Japan · #674,967 worldwide 7.2k citations · 43 works
  9. 9 Yoshiharu Mizui Japan · #748,706 worldwide 3.3k citations · 64 works
  10. 10 Kentaro Iso Japan · #770,327 worldwide 806 citations · 42 works
All ranked researchers at Eisai (Japan)

What are the most cited papers from Eisai (Japan)?

The most cited paper from Eisai (Japan) is "MassBank: a public repository for sharing mass spectral data for life sciences" (Hisayuki Horai et al., 2010), with 2,595 citations. Next come "Exponentially Modified Protein Abundance Index (emPAI) for Estimation of Absolute Protein Amount in Proteomics by the Number of Sequenced Peptides per Protein" (2,108) and "Toll-like Receptor-4 Mediates Lipopolysaccharide-induced Signal Transduction" (1,974).

Most cited papers
#PaperReleasedCitations
1 MassBank: a public repository for sharing mass spectral data for life sciences Hisayuki Horai et al. · Journal of Mass Spectrometry Open access Jul 2010 2,595
2 Exponentially Modified Protein Abundance Index (emPAI) for Estimation of Absolute Protein Amount in Proteomics by the Number of Sequenced Peptides per Protein Yasushi Ishihama, Yoshiya Oda, Tsuyoshi Tabata et al. · Molecular & Cellular Proteomics Open access 15 Jun 2005 2,108
3 Toll-like Receptor-4 Mediates Lipopolysaccharide-induced Signal Transduction Jesse C. Chow, Donna W. Young, Douglas Taylor Golenbock et al. · Journal of Biological Chemistry Open access Apr 1999 1,974
4 Phase Ib Study of Lenvatinib Plus Pembrolizumab in Patients With Unresectable Hepatocellular Carcinoma Richard S. Finn, Masafumi Ikeda, Andrew Xiuxuan Zhu et al. · Journal of Clinical Oncology Open access 27 Jul 2020 1,188
5 Eribulin monotherapy versus treatment of physician's choice in patients with metastatic breast cancer (EMBRACE): a phase 3 open-label randomised study Javier Cortés, Joyce O’Shaughnessy, David M. Loesch et al. · The Lancet Mar 2011 1,110
All 60 most cited papers, with filters and sorting

Which keywords describe research at Eisai (Japan)?

By fractional works in 2022-now, weighted toward what it does more of than the world: Circadian Rhythms, Oxidative Stress, Health Consequences, Meta-Analysis, Neurodegeneration, Cognitive Behavioral Therapy, Insomnia and Sleep Duration.

▲ 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. Circadian Rhythms25▲ 92×2 topics
  2. Oxidative Stress21▲ 5.1×24 topics
  3. Epidemiology20▲ 2.1×34 topics
  4. Inflammation15▲ 2.9×37 topics
  5. Health Consequences14▲ 19×3 topics
  6. Meta-Analysis14▲ 9.3×4 topics
  7. Cognitive Behavioral Therapy13▲ 38×2 topics
  8. Neurodegeneration13▲ 18×7 topics
  9. Insomnia13▲ 73×1 topic
  10. Sleep Duration13▲ 78×1 topic
  11. Learning12▲ 16×2 topics
  12. Neuroinflammation12▲ 16×6 topics
  13. Memory12▲ 19×1 topic
  14. Sleep12▲ 114×1 topic
  15. Biomarkers11▲ 6.3×10 topics
  16. Cancer10▲ 3.1×29 topics
  17. Alzheimer's Disease10▲ 15×6 topics
  18. Quality of Life10▲ 2.7×15 topics
  19. Neuroimaging9▲ 14×7 topics
  20. Therapeutic Strategies9▲ 39×2 topics
  21. Chemotherapy9▲ 5.2×18 topics
  22. Tumor Microenvironment9▲ 7.9×7 topics
  23. Amyloid Hypothesis9▲ 58×1 topic
  24. Tau Pathology9▲ 58×1 topic
  25. Aging8▲ 5.8×6 topics
  26. Pharmacokinetics8▲ 12×5 topics
  27. Breast Cancer8▲ 12×9 topics
  28. Neurological Disorders8▲ 5.4×15 topics
  29. Caregiver Burden7▲ 26×2 topics
  30. Dementia7▲ 30×1 topic
  31. Mild Cognitive Impairment7▲ 34×1 topic
  32. Drug Resistance7▲ 9.2×6 topics
  33. Medicinal Chemistry6▲ 9.7×4 topics
  34. Molecular Docking6▲ 21×4 topics
  35. Monoclonal Antibodies6▲ 29×3 topics
  36. Antiepileptic Drugs6▲ 31×2 topics
  37. Metastatic Breast Cancer6▲ 39×2 topics
  38. Drug Target Identification6▲ 25×1 topic
  39. Metastatic6▲ 35×2 topics
  40. Virtual Screening6▲ 25×1 topic

Which research topics does Eisai (Japan) publish most on?

By volume in 2022-now: Sleep and related disorders, Sleep and Wakefulness Research, Alzheimer's disease research and treatments and Dementia and Cognitive Impairment Research.

Sleep and related disorders: 13 fractional worksSleep and Wakefulness Research: 12 fractional worksAlzheimer's disease research and treatments: 9 fractional worksDementia and Cognitive Impairment Research: 7 fractional worksComputational Drug Discovery Methods: 6 fractional worksHER2/EGFR in Cancer Rese…4HER2/EGFR in Cancer Research: 4 fractional worksCancer Treatment and Pharmacology: 4 fractional worksEpilepsy research and treatment: 4 fractional worksMonoclonal and Polyclonal Antibodies Research: 4 fractional worksNeuroscience and Neuropharmacology Research: 3 fractional works
Experimental and Cognitive PsychologyCognitive NeurosciencePhysiologyPsychiatry and Mental health4 others

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

  1. 1 Sleep and related disorders Experimental and Cognitive Psychology 13 works
  2. 2 Sleep and Wakefulness Research Cognitive Neuroscience 12 works
  3. 3 Alzheimer's disease research and treatments Physiology 9 works
  4. 4 Dementia and Cognitive Impairment Research Psychiatry and Mental health 7 works
  5. 5 Computational Drug Discovery Methods Computational Theory and Mathematics 6 works
  6. 6 HER2/EGFR in Cancer Research Oncology 4 works
  7. 7 Cancer Treatment and Pharmacology Oncology 4 works
  8. 8 Epilepsy research and treatment Psychiatry and Mental health 4 works
  9. 9 Monoclonal and Polyclonal Antibodies Research Radiology, Nuclear Medicine and Imaging 4 works
  10. 10 Neuroscience and Neuropharmacology Research Cellular and Molecular Neuroscience 3 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 available41.5%not open58.5%

World: 40% of research is openly available.

with international co-authors16.5%domestic only83.5%

World: 18% is written across borders.

How has Eisai (Japan)'s research output changed?

Output in 2022-2025 was 10% 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 Eisai (Japan) as a percentage of every work published that year, 0.00097% in 2024.

still counting0.0050%0.010%Eisai (Japan)0.0010% in 202519801990200020102020

Fractional works of Eisai (Japan) 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 counting10%20%30%Eisai (Japan)11.0% in 2025all institutions10.0% in 2025200020102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 21.0% in 2011.

Other research institutions in Tokyo

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Eisai (Japan) on Science Explorer

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