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Company · Tokyo · Japan

Eisai (Japan)

In research, Eisai (Japan) stands highest in Medicine (#6,493 of 10,443 worldwide), Life Sciences (#5,376 of 7,800 worldwide) and Health Sciences (#8,285 of 11,982 worldwide), 2022–2025. Relative to its size it is most specialised in Oncology — Oncology is 8.4× its share of world research.

eisai.co.jpROR OpenAlex
World rank, 2022–2025
#12,332
of 28,054 · #8,288 all time
Rank in Japan
#313
of 1,070
Research works
2.4k
◆ 2% vs 2013–17
Citations
59k
24.7 per fractional work
Top-10% rate
15.6%
record average 16.5%
Open access
42%
world 28%

What is Eisai (Japan) 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 #6,493 of 10,443 20.1%90 #6581
Life SciencesDomain #5,376 of 7,800 13.1%70 #3782
Health SciencesDomain #8,285 of 11,982 19.7%93 #8677

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 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#6,581 #6,493
  2. Life Sciences#3,782 #5,376
  3. Health Sciences#8,677 #8,285
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 Eisai (Japan) specialise in?

Where its research is concentrated relative to its size: Oncology takes 8.4× the share of its output that it takes of world research.

  1. OncologySubfield · 20.2 works8.4×
← 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: 0.35× its world share, 4 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 3.00× its world share, 34 worksBiochemistry, Geneti…Immunology and Microbiology: 2.60× its world share, 6 worksImmunology and Micro…Neuroscience: 6.11× its world share, 21 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 6.45× its world share, 5 worksPharmacology, Toxico…Chemical Engineering: 0.11× its world share, 0 worksChemical EngineeringChemistry: 1.34× its world share, 4 worksChemistryComputer Science: 0.44× its world share, 7 worksComputer ScienceEarth and Planetary Sciences: 0.05× its world share, 0 worksEarth and Planetary …Engineering: 0.16× its world share, 5 worksEngineeringEnvironmental Science: 0.13× its world share, 1 worksEnvironmental ScienceMaterials Science: 0.24× its world share, 2 worksMaterials ScienceMathematics: 0.71× its world share, 2 worksMathematicsPhysics and Astronomy: 0.10× its world share, 0 worksPhysics and AstronomyDentistry: 0.16× its world share, 0 worksDentistryHealth Professions: 0.26× its world share, 2 worksHealth ProfessionsMedicine: 2.18× its world share, 90 worksMedicineNursing: 0.33× its world share, 0 worksNursingVeterinary: 1.76× its world share, 0 worksVeterinaryArts and Humanities: 0.11× its world share, 1 worksArts and HumanitiesBusiness, Management and Accounting: 0.24× its world share, 2 worksBusiness, Management…Decision Sciences: 0.15× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.93× its world share, 4 worksEconomics, Econometr…Psychology: 2.16× its world share, 14 worksPsychologySocial Sciences: 0.32× its world share, 9 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Pharmacology, Toxicology and Pharmaceutics, 6.5×. Every wedge is a field page.

Who are the top researchers at Eisai (Japan)?

Ranked on the composite score, Junji Matsui, C. Schwartz and Kazuto Yamazaki lead among researchers whose main affiliation is Eisai (Japan).

  1. 1 Junji Matsui Japan · #256,083 worldwide 130 citations · 28 works
  2. 2 C. Schwartz Japan · #338,938 worldwide 102 citations · 19 works
  3. 3 Kazuto Yamazaki Japan · #376,235 worldwide 97 citations · 27 works
  4. 4 John D. Orr Japan · #451,538 worldwide 61 citations · 17 works
  5. 5 Yoichi Ozawa Japan · #515,322 worldwide 67 citations · 15 works
  6. 6 Sumiko Takahashi Japan · #546,568 worldwide 12 citations · 18 works
  7. 7 SHOJI TOYOSHIMA Japan · #570,113 worldwide 22 citations · 20 works
  8. 8 Shigeru Tanaka Japan · #610,480 worldwide 48 citations · 29 works
  9. 9 Yasuhiro Funahashi Japan · #654,813 worldwide 75 citations · 25 works
  10. 10 Kouichi Abe Japan · #682,296 worldwide 48 citations · 16 works
All ranked researchers at Eisai (Japan)

Which keywords describe research at Eisai (Japan)?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Circadian Rhythms, Oxidative Stress, Health Consequences, Meta-Analysis, Cognitive Behavioral Therapy, Insomnia, Sleep Duration and Neurodegeneration.

▲ 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. Circadian Rhythms22▲ 99×2 topics
  2. Oxidative Stress18▲ 5.2×23 topics
  3. Epidemiology18▲ 2.1×30 topics
  4. Inflammation13▲ 3.0×35 topics
  5. Health Consequences12▲ 20×3 topics
  6. Meta-Analysis12▲ 9.7×4 topics
  7. Cognitive Behavioral Therapy12▲ 43×2 topics
  8. Insomnia12▲ 82×1 topic
  9. Sleep Duration12▲ 88×1 topic
  10. Neurodegeneration11▲ 17×7 topics
  11. Learning10▲ 16×2 topics
  12. Memory10▲ 19×1 topic
  13. Sleep10▲ 119×1 topic
  14. Neuroinflammation10▲ 16×5 topics
  15. Biomarkers9▲ 6.3×9 topics
  16. Alzheimer's Disease9▲ 15×6 topics
  17. Cancer9▲ 3.0×28 topics
  18. Quality of Life8▲ 2.8×14 topics
  19. Therapeutic Strategies8▲ 39×2 topics
  20. Tumor Microenvironment8▲ 8.1×7 topics
  21. Neuroimaging8▲ 13×7 topics
  22. Pharmacokinetics8▲ 13×4 topics
  23. Chemotherapy8▲ 5.0×17 topics
  24. Amyloid Hypothesis7▲ 58×1 topic
  25. Tau Pathology7▲ 58×1 topic
  26. Aging7▲ 5.8×6 topics
  27. Medicinal Chemistry6▲ 11×4 topics
  28. Caregiver Burden6▲ 27×2 topics
  29. Drug Resistance6▲ 10×6 topics
  30. Neurological Disorders6▲ 5.1×13 topics
  31. Dementia6▲ 30×1 topic
  32. Mild Cognitive Impairment6▲ 34×1 topic
  33. Molecular Docking6▲ 22×3 topics
  34. Antiepileptic Drugs6▲ 36×2 topics
  35. Breast Cancer6▲ 11×9 topics
  36. Drug Target Identification6▲ 28×1 topic
  37. Virtual Screening6▲ 28×1 topic
  38. Monoclonal Antibodies5▲ 28×3 topics
  39. Metastatic Breast Cancer5▲ 40×2 topics
  40. Glycosylation5▲ 19×3 topics

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

By volume in 2022–2025: Sleep and related disorders, Sleep and Wakefulness Research, Alzheimer's disease research and treatments and Dementia and Cognitive Impairment Research.

Sleep and related disord…12Sleep and related disorders: 12 fractional worksSleep and Wakefulness Research: 10 fractional worksAlzheimer's disease research and treatments: 7 fractional worksDementia and Cognitive Impairment Research: 6 fractional worksComputational Drug Discovery Methods: 6 fractional worksEpilepsy research and tr…4Epilepsy research and treatment: 4 fractional worksCancer Treatment and Pharmacology: 4 fractional worksMonoclonal and Polyclonal Antibodies Research: 3 fractional worksHER2/EGFR in Cancer Research: 3 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 12 works
  2. 2 Sleep and Wakefulness Research Cognitive Neuroscience 10 works
  3. 3 Alzheimer's disease research and treatments Physiology 7 works
  4. 4 Dementia and Cognitive Impairment Research Psychiatry and Mental health 6 works
  5. 5 Computational Drug Discovery Methods Computational Theory and Mathematics 6 works
  6. 6 Epilepsy research and treatment Psychiatry and Mental health 4 works
  7. 7 Cancer Treatment and Pharmacology Oncology 4 works
  8. 8 Monoclonal and Polyclonal Antibodies Research Radiology, Nuclear Medicine and Imaging 3 works
  9. 9 HER2/EGFR in Cancer Research Oncology 3 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: 28% of research is openly available.

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

World: 19% is written across borders.

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

Output in 2018–2022 was 2% 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 Tokyo

All research institutions in Tokyo

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.