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University · Maebashi · Japan

Gunma University

In research, Gunma University stands highest in Medicine (#1,106 of 10,443 worldwide), Health Sciences (#1,508 of 11,982 worldwide) and Life Sciences (#2,038 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Ophthalmology — Ophthalmology is 4.1× its share of world research.

gunma-u.ac.jpROR OpenAlex
World rank, 2022–2025
#3,312
of 28,054 · #1,855 all time
Rank in Japan
#60
of 1,070
Research works
26k
▼ 10% vs 2013–17
Citations
408k
15.4 per fractional work
Top-10% rate
9.1%
record average 16.5%
Open access
45%
world 28%

What is Gunma 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 #1,106 of 10,443 11.4%799 #1257
Health SciencesDomain #1,508 of 11,982 11.2%857 #1571
Life SciencesDomain #2,038 of 7,800 13.3%318 #1148
Physical SciencesDomain #4,283 of 12,888 4.8%717 #2118
Biochemistry, Genetics and Molecular BiologyField #1,530 of 3,579 13.1%208 #978
EngineeringField #3,911 of 6,636 4.5%354 #1989
SurgerySubfield #1,163 of 1,816 8.2%132 #797
Molecular BiologySubfield #1,620 of 2,175 13.7%122 #929
Pulmonary and Respiratory MedicineSubfield #946 of 1,144 7.7%94 #594
Social SciencesDomain #9,180 of 10,521 8.4%99 #8806

Each strip is that field’s whole ranked pool, with the notch where Gunma 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#1,257 #1,106
  2. Health Sciences#1,571 #1,508
  3. Life Sciences#1,148 #2,038
  4. Physical Sciences#2,118 #4,283
  5. Biochemistry, Genetics and Molecular Biology#978 #1,530
  6. Engineering#1,989 #3,911
  7. Surgery#797 #1,163
  8. Molecular Biology#929 #1,620
  9. Pulmonary and Respiratory Medicine#594 #946
  10. Social Sciences#8,806 #9,180
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 Gunma University specialise in?

Where its research is concentrated relative to its size: Ophthalmology takes 4.1× the share of its output that it takes of world research.

  1. OphthalmologySubfield · 21.7 works4.1×
← 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: 0.23× its world share, 22 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.96× its world share, 208 worksBiochemistry, Geneti…Immunology and Microbiology: 1.27× its world share, 25 worksImmunology and Micro…Neuroscience: 1.71× its world share, 55 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.12× its world share, 8 worksPharmacology, Toxico…Chemical Engineering: 1.27× its world share, 9 worksChemical EngineeringChemistry: 1.45× its world share, 45 worksChemistryComputer Science: 0.69× its world share, 107 worksComputer ScienceEarth and Planetary Sciences: 0.19× its world share, 6 worksEarth and Planetary …Energy: 0.45× its world share, 8 worksEnergyEngineering: 1.18× its world share, 354 worksEngineeringEnvironmental Science: 0.29× its world share, 29 worksEnvironmental ScienceMaterials Science: 1.59× its world share, 110 worksMaterials ScienceMathematics: 0.62× its world share, 14 worksMathematicsPhysics and Astronomy: 0.78× its world share, 35 worksPhysics and AstronomyDentistry: 0.63× its world share, 6 worksDentistryHealth Professions: 0.71× its world share, 37 worksHealth ProfessionsMedicine: 2.09× its world share, 799 worksMedicineNursing: 1.49× its world share, 14 worksNursingVeterinary: 0.06× its world share, 0 worksVeterinaryArts and Humanities: 0.19× its world share, 11 worksArts and HumanitiesBusiness, Management and Accounting: 0.06× its world share, 4 worksBusiness, Management…Decision Sciences: 0.27× its world share, 5 worksDecision SciencesEconomics, Econometrics and Finance: 0.12× its world share, 5 worksEconomics, Econometr…Psychology: 0.48× its world share, 29 worksPsychologySocial Sciences: 0.18× its world share, 45 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

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

Who are the top researchers at Gunma University?

Ranked on the composite score, Sadao Adachi, M Izuo and Kenji Takagishi lead among researchers whose main affiliation is Gunma University.

  1. 1 Sadao Adachi Japan · #17,084 worldwide 1.1k citations · 100 works
  2. 2 M Izuo Japan · #37,150 worldwide 227 citations · 48 works
  3. 3 Kenji Takagishi Japan · #58,760 worldwide 234 citations · 60 works
  4. 4 Hiroshi Koyama Japan · #71,206 worldwide 419 citations · 105 works
  5. 5 Yoji Yoshida Japan · #107,536 worldwide 139 citations · 29 works
  6. 6 Zen Itoh Japan · #109,006 worldwide 192 citations · 44 works
  7. 7 Genju Ooneda Japan · #111,636 worldwide 146 citations · 31 works
  8. 8 Takashi Yanagawa Japan · #122,473 worldwide 181 citations · 27 works
  9. 9 Takeshi Tomomasa Japan · #122,832 worldwide 152 citations · 29 works
  10. 10 Akihiro Morikawa Japan · #127,861 worldwide 235 citations · 93 works
All ranked researchers at Gunma University

Which keywords describe research at Gunma University?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Inflammation, Cancer, Chemotherapy, Oxidative Stress, Mechanical Properties, Clinical Practice Guidelines and Neoadjuvant Therapy.

▲ 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. Epidemiology132▲ 1.68×113 topics
  2. Inflammation93▲ 2.2×73 topics
  3. Oxidative Stress66▲ 2.0×51 topics
  4. Cancer64▲ 2.4×46 topics
  5. Mechanical Properties51▲ 2.6×27 topics
  6. Chemotherapy49▲ 3.5×23 topics
  7. Treatment44▲ 1.82×44 topics
  8. Nanoparticles43▲ 1.73×31 topics
  9. Diagnosis42▲ 2.2×39 topics
  10. Clinical Practice Guidelines41▲ 3.8×14 topics
  11. Quality of Life41▲ 1.42×40 topics
  12. Cardiovascular Disease36▲ 1.62×32 topics
  13. Immunotherapy35▲ 2.5×17 topics
  14. Biomedical Applications35▲ 1.47×32 topics
  15. Management35▲ 2.2×28 topics
  16. Tumor Microenvironment34▲ 3.9×8 topics
  17. Obesity31▲ 2.0×21 topics
  18. Heart Failure30▲ 3.5×13 topics
  19. Neoadjuvant Therapy28▲ 6.1×5 topics
  20. Complications28▲ 2.8×14 topics
  21. Guidelines28▲ 3.0×13 topics
  22. Genetic Mutations27▲ 3.1×21 topics
  23. Aging27▲ 2.5×16 topics
  24. Prognostic Factors26▲ 3.0×14 topics
  25. Surgical Management26▲ 3.2×20 topics
  26. Survival Analysis25▲ 4.6×6 topics
  27. Radiotherapy25▲ 3.2×13 topics
  28. Endoscopic Resection24▲ 12×2 topics
  29. Prognosis24▲ 3.7×9 topics
  30. Surgery24▲ 3.5×10 topics
  31. Echocardiography22▲ 4.0×7 topics
  32. Cardiovascular Risk21▲ 3.4×9 topics
  33. Metastasis21▲ 3.1×12 topics
  34. Molecular Characterization19▲ 5.3×6 topics
  35. Preoperative Chemoradiotherapy18▲ 12×2 topics
  36. Microstructural Evolution16▲ 5.3×3 topics
  37. Gastric Cancer16▲ 7.0×3 topics
  38. Adjuvant Therapy15▲ 6.0×2 topics
  39. Chemoradiation15▲ 12×2 topics
  40. Neoadjuvant Chemotherapy14▲ 8.5×2 topics

Which research topics does Gunma University publish most on?

By volume in 2022–2025: Gastric Cancer Management and Outcomes, Esophageal Cancer Research and Treatment, Pancreatic function and diabetes and Nutrition and Health in Aging.

Gastric Cancer Managemen…12Gastric Cancer Management and Outcomes: 12 fractional worksEsophageal Cancer Resear…12Esophageal Cancer Research and Treatment: 12 fractional worksPancreatic function and diabetes: 11 fractional worksNutrition and Health in …10Nutrition and Health in Aging: 10 fractional worksCardiovascular Function …10Cardiovascular Function and Risk Factors: 10 fractional worksAluminum Alloy Microstructure Properties: 9 fractional worksRadiation Therapy and Dosimetry: 9 fractional worksAluminum Alloys Composit…8Aluminum Alloys Composites Properties: 8 fractional worksRetinal Diseases and Treatments: 8 fractional worksCancer Immunotherapy and Biomarkers: 8 fractional works
Pulmonary and Respiratory MedicineSurgeryPhysiologyCardiology and Cardiovascular Medicine4 others

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

  1. 1 Gastric Cancer Management and Outcomes Pulmonary and Respiratory Medicine 12 works
  2. 2 Esophageal Cancer Research and Treatment Surgery 12 works
  3. 3 Pancreatic function and diabetes Surgery 11 works
  4. 4 Nutrition and Health in Aging Physiology 10 works
  5. 5 Cardiovascular Function and Risk Factors Cardiology and Cardiovascular Medicine 10 works
  6. 6 Aluminum Alloy Microstructure Properties Aerospace Engineering 9 works
  7. 7 Radiation Therapy and Dosimetry Pulmonary and Respiratory Medicine 9 works
  8. 8 Aluminum Alloys Composites Properties Mechanical Engineering 8 works
  9. 9 Retinal Diseases and Treatments Ophthalmology 8 works
  10. 10 Cancer Immunotherapy and Biomarkers Oncology 8 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 available45.3%not open54.7%

World: 28% of research is openly available.

with international co-authors7.2%domestic only92.8%

World: 19% is written across borders.

How has Gunma University's research output changed?

Output in 2018–2022 was 10% 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 Maebashi

All research institutions in Maebashi

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.