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University · Okinawa · Japan

University of the Ryukyus

In research, University of the Ryukyus stands highest in Medicine (#2,594 of 10,443 worldwide), Health Sciences (#3,561 of 11,982 worldwide) and Life Sciences (#3,050 of 7,800 worldwide), 2022–2025. Relative to its size it is most specialised in Oceanography, Ecology and Ecology, Evolution, Behavior and Systematics — Oceanography is 11.9× its share of world research.

u-ryukyu.ac.jpROR OpenAlex
World rank, 2022–2025
#5,068
of 28,054 · #3,915 all time
Rank in Japan
#116
of 1,070
Research works
10k
▲ 6% vs 2013–17
Citations
182k
18.1 per fractional work
Top-10% rate
13.3%
record average 16.5%
Open access
40%
world 28%

What is University of the Ryukyus 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 #2,594 of 10,443 11.8%325 #2766
Health SciencesDomain #3,561 of 11,982 11.8%354 #3699
Life SciencesDomain #3,050 of 7,800 11.1%259 #2734
Physical SciencesDomain #5,091 of 12,888 13.1%503 #3784
EngineeringField #2,770 of 6,636 18.0%140 #2489
Environmental ScienceField #2,081 of 3,551 13.2%145 #1884
Social SciencesDomain #7,851 of 10,521 30.7%72 #7711
Biochemistry, Genetics and Molecular BiologyField #2,862 of 3,579 10.6%110 #2136
EcologySubfield #479 of 578 13.4%66 #777
Agricultural and Biological SciencesField #2,942 of 3,409 11.7%93 #2885

Each strip is that field’s whole ranked pool, with the notch where University of the Ryukyus 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#2,766 #2,594
  2. Health Sciences#3,699 #3,561
  3. Life Sciences#2,734 #3,050
  4. Physical Sciences#3,784 #5,091
  5. Engineering#2,489 #2,770
  6. Environmental Science#1,884 #2,081
  7. Social Sciences#7,711 #7,851
  8. Biochemistry, Genetics and Molecular Biology#2,136 #2,862
  9. Ecology#777 #479
  10. Agricultural and Biological Sciences#2,885 #2,942
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 University of the Ryukyus specialise in?

Where its research is concentrated relative to its size: Oceanography takes 11.9× the share of its output that it takes of world research.

  1. OceanographySubfield · 39.5 works12×
  2. EcologySubfield · 66.3 works7.1×
  3. Ecology, Evolution, Behavior and SystematicsSubfield · 33.3 works6.0×
← 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: 1.65× its world share, 93 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.73× its world share, 110 worksBiochemistry, Geneti…Immunology and Microbiology: 2.09× its world share, 25 worksImmunology and Micro…Neuroscience: 1.35× its world share, 26 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.26× its world share, 5 worksPharmacology, Toxico…Chemical Engineering: 0.42× its world share, 2 worksChemical EngineeringChemistry: 0.84× its world share, 16 worksChemistryComputer Science: 0.47× its world share, 43 worksComputer ScienceEarth and Planetary Sciences: 3.39× its world share, 63 worksEarth and Planetary …Energy: 1.40× its world share, 15 worksEnergyEngineering: 0.79× its world share, 140 worksEngineeringEnvironmental Science: 2.45× its world share, 145 worksEnvironmental ScienceMaterials Science: 0.54× its world share, 22 worksMaterials ScienceMathematics: 2.00× its world share, 28 worksMathematicsPhysics and Astronomy: 1.10× its world share, 29 worksPhysics and AstronomyDentistry: 0.83× its world share, 5 worksDentistryHealth Professions: 0.42× its world share, 13 worksHealth ProfessionsMedicine: 1.42× its world share, 325 worksMedicineNursing: 1.39× its world share, 8 worksNursingVeterinary: 1.74× its world share, 3 worksVeterinaryArts and Humanities: 0.39× its world share, 13 worksArts and HumanitiesBusiness, Management and Accounting: 0.12× its world share, 5 worksBusiness, Management…Decision Sciences: 0.21× its world share, 2 worksDecision SciencesEconomics, Econometrics and Finance: 0.20× its world share, 5 worksEconomics, Econometr…Psychology: 0.47× its world share, 17 worksPsychologySocial Sciences: 0.20× its world share, 30 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Earth and Planetary Sciences, 3.4×. Every wedge is a field page.

Who are the top researchers at University of the Ryukyus?

Ranked on the composite score, Shinichiro Ueda, Shinkichi Tawata and Ryuichi Shinjo lead among researchers whose main affiliation is University of the Ryukyus.

  1. 1 Shinichiro Ueda Japan · #49,934 worldwide 313 citations · 53 works
  2. 2 Shinkichi Tawata Japan · #54,108 worldwide 285 citations · 38 works
  3. 3 Ryuichi Shinjo Japan · #65,980 worldwide 807 citations · 50 works
  4. 4 Yusuke Ohya Japan · #71,132 worldwide 294 citations · 58 works
  5. 5 Atsushi Yona Japan · #121,042 worldwide 575 citations · 74 works
  6. 6 Yuetsu Tanaka Japan · #129,396 worldwide 199 citations · 39 works
  7. 7 K. Uezato Japan · #159,250 worldwide 239 citations · 30 works
  8. 8 N. Urasaki Japan · #162,105 worldwide 339 citations · 19 works
  9. 9 Ahmed Yousuf Saber Japan · #165,059 worldwide 178 citations · 35 works
  10. 10 Tatsuo Higa Japan · #173,656 worldwide 152 citations · 27 works
All ranked researchers at University of the Ryukyus

Which keywords describe research at University of the Ryukyus?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Climate Change, Ocean Acidification, Marine Ecosystems, Epidemiology, Bleaching, Coral Reefs, Benthic Communities and Marine Biodiversity.

▲ 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. Climate Change97▲ 3.0×67 topics
  2. Epidemiology74▲ 1.57×112 topics
  3. Ocean Acidification49▲ 56×3 topics
  4. Renewable Energy36▲ 2.1×28 topics
  5. Inflammation36▲ 1.44×69 topics
  6. Biodiversity35▲ 4.0×26 topics
  7. Marine Ecosystems33▲ 52×2 topics
  8. Invasive Species30▲ 5.9×18 topics
  9. Oxidative Stress29▲ 1.51×49 topics
  10. Environmental Impact29▲ 1.45×40 topics
  11. Bleaching29▲ 74×1 topic
  12. Coral Reefs29▲ 74×1 topic
  13. Benthic Communities28▲ 40×2 topics
  14. Marine Biodiversity28▲ 40×2 topics
  15. Biogeography24▲ 7.6×19 topics
  16. Coastal Protection22▲ 30×2 topics
  17. Conservation20▲ 3.8×17 topics
  18. Climate Change Impacts20▲ 14×3 topics
  19. Ecosystem Resilience20▲ 11×3 topics
  20. DNA Barcoding19▲ 10.0×8 topics
  21. Population Dynamics18▲ 6.0×11 topics
  22. Kelp Forests18▲ 53×1 topic
  23. Seagrasses18▲ 53×1 topic
  24. Phylogenetic Analysis18▲ 4.9×13 topics
  25. Renewable Energy Integration18▲ 4.4×5 topics
  26. Ecosystem Services17▲ 3.8×8 topics
  27. Ecosystem Functioning17▲ 7.4×7 topics
  28. Habitat Fragmentation16▲ 6.0×5 topics
  29. Smart Grid16▲ 3.5×7 topics
  30. Global Change15▲ 4.8×6 topics
  31. Fisheries Sustainability15▲ 14×2 topics
  32. Power Electronics15▲ 3.7×8 topics
  33. Trophic Cascades14▲ 13×2 topics
  34. Aquaculture14▲ 4.5×7 topics
  35. Molecular Phylogeny13▲ 7.2×10 topics
  36. Ecosystem Management12▲ 17×2 topics
  37. Fish Population Dynamics12▲ 23×1 topic
  38. Marine Fisheries12▲ 23×1 topic
  39. Smart Grid Applications11▲ 7.0×2 topics
  40. Phylogenetic Relationships10▲ 12×3 topics

Which research topics does University of the Ryukyus publish most on?

By volume in 2022–2025: Coral and Marine Ecosystems Studies, Marine and coastal plant biology, Marine and fisheries research and Marine Biology and Ecology Research.

Coral and Marine Ecosyst…29Coral and Marine Ecosystems Studies: 29 fractional worksMarine and coastal plant biology: 18 fractional worksMarine and fisheries research: 12 fractional worksMarine Biology and Ecology Research: 10 fractional worksMicrogrid Control and Optimization: 10 fractional worksSmart Grid Energy Manage…9Smart Grid Energy Management: 9 fractional worksPlant and animal studies: 7 fractional worksMarine Sponges and Natural Products: 6 fractional worksIdentification and Quantification in Food: 6 fractional worksHybrid Renewable Energy Systems: 6 fractional works
EcologyOceanographyGlobal and Planetary ChangeControl and Systems Engineering5 others

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

  1. 1 Coral and Marine Ecosystems Studies Ecology 29 works
  2. 2 Marine and coastal plant biology Oceanography 18 works
  3. 3 Marine and fisheries research Global and Planetary Change 12 works
  4. 4 Marine Biology and Ecology Research Oceanography 10 works
  5. 5 Microgrid Control and Optimization Control and Systems Engineering 10 works
  6. 6 Smart Grid Energy Management Electrical and Electronic Engineering 9 works
  7. 7 Plant and animal studies Ecology, Evolution, Behavior and Systematics 7 works
  8. 8 Marine Sponges and Natural Products Biotechnology 6 works
  9. 9 Identification and Quantification in Food Molecular Biology 6 works
  10. 10 Hybrid Renewable Energy Systems Energy Engineering and Power Technology 6 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 available40.5%not open59.5%

World: 28% of research is openly available.

with international co-authors16.0%domestic only84.0%

World: 19% is written across borders.

How has University of the Ryukyus's research output changed?

Output in 2018–2022 was 6% higher 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 Okinawa

All research institutions in Okinawa

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.