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Research facility · Tokyo · Japan

National Maritime Research Institute

In research, National Maritime Research Institute stands highest in Physical Sciences (#9,781 of 12,888 worldwide) and Engineering (#5,560 of 6,636 worldwide), 2022–2025. Relative to its size it is most specialised in Ocean Engineering — Ocean Engineering is 47.4× its share of world research.

nmri.go.jp/englishROR OpenAlex
World rank, 2022–2025
#17,612
of 28,054 · #23,481 all time
Rank in Japan
#476
of 1,070
Research works
1.3k
▲ 46% vs 2013–17
Citations
7.3k
5.8 per fractional work
Top-10% rate
7.3%
record average 16.5%
Open access
44%
world 28%

What is National Maritime Research Institute 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
Physical SciencesDomain #9,781 of 12,888 6.4%196 #13126
EngineeringField #5,560 of 6,636 5.4%142 #6393

Each strip is that field’s whole ranked pool, with the notch where National Maritime Research Institute 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).

What does National Maritime Research Institute specialise in?

Where its research is concentrated relative to its size: Ocean Engineering takes 47.4× the share of its output that it takes of world research.

  1. Ocean EngineeringSubfield · 53.9 works47×
← 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: 0.26× its world share, 3 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.06× its world share, 1 worksBiochemistry, Geneti…Immunology and Microbiology: 0.10× its world share, 0 worksImmunology and Micro…Neuroscience: 0.07× its world share, 0 worksNeuroscienceChemical Engineering: 4.03× its world share, 3 worksChemical EngineeringChemistry: 0.15× its world share, 0 worksChemistryComputer Science: 0.37× its world share, 6 worksComputer ScienceEarth and Planetary Sciences: 3.68× its world share, 13 worksEarth and Planetary …Energy: 0.17× its world share, 0 worksEnergyEngineering: 4.32× its world share, 142 worksEngineeringEnvironmental Science: 1.83× its world share, 20 worksEnvironmental ScienceMaterials Science: 1.08× its world share, 8 worksMaterials ScienceMathematics: 0.03× its world share, 0 worksMathematicsPhysics and Astronomy: 0.74× its world share, 4 worksPhysics and AstronomyHealth Professions: 0.26× its world share, 2 worksHealth ProfessionsMedicine: 0.04× its world share, 2 worksMedicineBusiness, Management and Accounting: 0.21× its world share, 2 worksBusiness, Management…Decision Sciences: 2.31× its world share, 5 worksDecision SciencesEconomics, Econometrics and Finance: 0.35× its world share, 2 worksEconomics, Econometr…Psychology: 0.27× its world share, 2 worksPsychologySocial Sciences: 0.20× its world share, 6 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Engineering, 4.3×. Every wedge is a field page.

Who are the top researchers at National Maritime Research Institute?

Ranked on the composite score, Michio Ueno, Sumito Nishio and Yasuyuki NIWA lead among researchers whose main affiliation is National Maritime Research Institute.

  1. 1 Michio Ueno Japan · #593,291 worldwide 51 citations · 21 works
  2. 2 Sumito Nishio Japan · #705,044 worldwide 3 citations · 24 works
  3. 3 Yasuyuki NIWA Japan · #734,832 worldwide 9 citations · 17 works
  4. 4 Takahiro Majima Japan · #931,492 worldwide 22 citations · 17 works
  5. 5 Keiko Miyazaki Japan · #965,447 worldwide 14 citations · 30 works
  6. 6 Yoshiaki Tsukada Japan · #1,014,125 worldwide 26 citations · 15 works
  7. 7 Kenji Yoshimura Japan · #1,030,425 worldwide 5 citations · 20 works
  8. 8 Masahiko Sasano Japan · #1,054,225 worldwide 8 citations · 21 works
  9. 9 Yoichi Niki Japan · #1,061,060 worldwide 36 citations · 19 works
  10. 10 Katsuya Maeda Japan · #1,080,867 worldwide 35 citations · 22 works
All ranked researchers at National Maritime Research Institute

Which keywords describe research at National Maritime Research Institute?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Maritime Transportation, CFD Simulations, Ship Maneuvering, Environmental Impact, Numerical Simulation, Risk Assessment, Collision Avoidance and Human Factors.

▲ 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. Maritime Transportation19▲ 164×2 topics
  2. Environmental Impact18▲ 4.8×17 topics
  3. CFD Simulations14▲ 497×1 topic
  4. Renewable Energy14▲ 4.6×13 topics
  5. Ship Maneuvering14▲ 497×1 topic
  6. Numerical Simulation14▲ 21×7 topics
  7. Risk Assessment13▲ 9.1×7 topics
  8. Collision Avoidance13▲ 33×3 topics
  9. Human Factors13▲ 75×3 topics
  10. Path Planning12▲ 45×2 topics
  11. Climate Change12▲ 1.96×19 topics
  12. Autonomous Ships11▲ 172×1 topic
  13. Unmanned Surface Vehicles11▲ 172×1 topic
  14. Fluid-Structure Interaction11▲ 32×6 topics
  15. Emissions11▲ 25×3 topics
  16. Air Quality10▲ 25×3 topics
  17. Finite Element Analysis10▲ 20×6 topics
  18. Fuel Consumption9▲ 59×2 topics
  19. Wireless Sensor Networks9▲ 9.4×7 topics
  20. Shipping8▲ 73×2 topics
  21. Emission Control Areas8▲ 155×1 topic
  22. Pipeline8▲ 32×3 topics
  23. Ship Propulsion8▲ 155×1 topic
  24. Control Strategies7▲ 24×3 topics
  25. Corrosion7▲ 25×3 topics
  26. SPH Method7▲ 107×1 topic
  27. Smoothed Particle Hydrodynamics7▲ 107×1 topic
  28. CFD Simulation6▲ 26×4 topics
  29. Pitting Corrosion6▲ 57×2 topics
  30. Oil and Gas6▲ 75×2 topics
  31. Steel Structures6▲ 73×2 topics
  32. Technology6▲ 5.2×2 topics
  33. Risk Analysis6▲ 26×2 topics
  34. Offshore6▲ 152×1 topic
  35. Reliability Assessment6▲ 61×1 topic
  36. Flow Assurance6▲ 278×1 topic
  37. Subsea6▲ 278×1 topic
  38. Power Take-Off6▲ 136×1 topic
  39. Wave Energy6▲ 136×1 topic
  40. Acoustic Communications5▲ 51×1 topic

Which research topics does National Maritime Research Institute publish most on?

By volume in 2022–2025: Ship Hydrodynamics and Maneuverability, Maritime Navigation and Safety, Maritime Transport Emissions and Efficiency and Fluid Dynamics Simulations and Interactions.

Ship Hydrodynamics and M…14Ship Hydrodynamics and Maneuverability: 14 fractional worksMaritime Navigation and Safety: 11 fractional worksMaritime Transport Emiss…8Maritime Transport Emissions and Efficiency: 8 fractional worksFluid Dynamics Simulatio…7Fluid Dynamics Simulations and Interactions: 7 fractional worksStructural Integrity and Reliability Analysis: 6 fractional worksOffshore Engineering and Technologies: 6 fractional worksWave and Wind Energy Sys…6Wave and Wind Energy Systems: 6 fractional worksUnderwater Vehicles and Communication Systems: 5 fractional worksFatigue and fracture mechanics: 4 fractional worksMarine and Offshore Engineering Studies: 3 fractional works
Ocean EngineeringEnvironmental EngineeringComputational MechanicsMechanical Engineering1 others

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

  1. 1 Ship Hydrodynamics and Maneuverability Ocean Engineering 14 works
  2. 2 Maritime Navigation and Safety Ocean Engineering 11 works
  3. 3 Maritime Transport Emissions and Efficiency Environmental Engineering 8 works
  4. 4 Fluid Dynamics Simulations and Interactions Computational Mechanics 7 works
  5. 5 Structural Integrity and Reliability Analysis Mechanical Engineering 6 works
  6. 6 Offshore Engineering and Technologies Ocean Engineering 6 works
  7. 7 Wave and Wind Energy Systems Ocean Engineering 6 works
  8. 8 Underwater Vehicles and Communication Systems Ocean Engineering 5 works
  9. 9 Fatigue and fracture mechanics Mechanics of Materials 4 works
  10. 10 Marine and Offshore Engineering Studies Ocean Engineering 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 available44.1%not open55.9%

World: 28% of research is openly available.

with international co-authors10.8%domestic only89.2%

World: 19% is written across borders.

How has National Maritime Research Institute's research output changed?

Output in 2018–2022 was 46% 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 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.