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Company · Tokyo · Japan

Hitachi (Japan)

In research, Hitachi (Japan) stands highest in Engineering (#1,316 of 6,636 worldwide), Physical Sciences (#2,816 of 12,888 worldwide) and Computer Science (#2,271 of 4,667 worldwide), 2022–2025. Relative to its size it is most specialised in Industrial and Manufacturing Engineering and Control and Systems Engineering — Industrial and Manufacturing Engineering is 6.8× its share of world research.

hitachi.comROR OpenAlex
World rank, 2022–2025
#4,344
of 28,054 · #601 all time
Rank in Japan
#91
of 1,070
Research works
33k
▼ 21% vs 2013–17
Citations
385k
11.5 per fractional work
Top-10% rate
5.2%
record average 16.5%
Open access
26%
world 28%

What is Hitachi (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
EngineeringField #1,316 of 6,636 3.6%810 #281
Physical SciencesDomain #2,816 of 12,888 4.6%1,388 #444
Computer ScienceField #2,271 of 4,667 6.5%269 #592
Health SciencesDomain #7,504 of 11,982 11.6%77 #8100
Physics and AstronomyField #1,122 of 1,646 8.2%81 #256
Electrical and Electronic EngineeringSubfield #1,626 of 2,318 2.8%276 #189
Life SciencesDomain #5,497 of 7,800 9.7%61 #1664
MedicineField #7,564 of 10,443 12.0%67 #7358
Materials ScienceField #2,198 of 2,468 3.5%123 #266
Mechanical EngineeringSubfield #1,207 of 1,351 3.3%96 #246

Each strip is that field’s whole ranked pool, with the notch where Hitachi (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. Engineering#281 #1,316
  2. Physical Sciences#444 #2,816
  3. Computer Science#592 #2,271
  4. Health Sciences#8,100 #7,504
  5. Physics and Astronomy#256 #1,122
  6. Electrical and Electronic Engineering#189 #1,626
  7. Life Sciences#1,664 #5,497
  8. Medicine#7,358 #7,564
  9. Materials Science#266 #2,198
  10. Mechanical Engineering#246 #1,207
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 Hitachi (Japan) specialise in?

Where its research is concentrated relative to its size: Industrial and Manufacturing Engineering takes 6.8× the share of its output that it takes of world research.

  1. Industrial and Manufacturing EngineeringSubfield · 57.0 works6.8×
  2. Control and Systems EngineeringSubfield · 101.6 works5.8×
← 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: 0.13× its world share, 10 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.41× its world share, 35 worksBiochemistry, Geneti…Immunology and Microbiology: 0.15× its world share, 2 worksImmunology and Micro…Neuroscience: 0.42× its world share, 11 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.38× its world share, 2 worksPharmacology, Toxico…Chemical Engineering: 1.75× its world share, 10 worksChemical EngineeringChemistry: 0.76× its world share, 19 worksChemistryComputer Science: 2.14× its world share, 269 worksComputer ScienceEarth and Planetary Sciences: 0.42× its world share, 11 worksEarth and Planetary …Energy: 1.08× its world share, 16 worksEnergyEngineering: 3.33× its world share, 810 worksEngineeringEnvironmental Science: 0.47× its world share, 38 worksEnvironmental ScienceMaterials Science: 2.17× its world share, 123 worksMaterials ScienceMathematics: 0.54× its world share, 10 worksMathematicsPhysics and Astronomy: 2.26× its world share, 82 worksPhysics and AstronomyDentistry: 0.06× its world share, 0 worksDentistryHealth Professions: 0.19× its world share, 8 worksHealth ProfessionsMedicine: 0.21× its world share, 67 worksMedicineNursing: 0.18× its world share, 1 worksNursingVeterinary: 0.12× its world share, 0 worksVeterinaryArts and Humanities: 0.12× its world share, 6 worksArts and HumanitiesBusiness, Management and Accounting: 0.42× its world share, 22 worksBusiness, Management…Decision Sciences: 1.01× its world share, 16 worksDecision SciencesEconomics, Econometrics and Finance: 0.15× its world share, 5 worksEconomics, Econometr…Psychology: 0.36× its world share, 18 worksPsychologySocial Sciences: 0.14× its world share, 29 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Engineering, 3.3×. Every wedge is a field page.

Who are the top researchers at Hitachi (Japan)?

Ranked on the composite score, T. Kitatani, K. Uomi and Tsuyoshi Matsuda lead among researchers whose main affiliation is Hitachi (Japan).

  1. 1 T. Kitatani · #23,882 worldwide 500 citations · 54 works
  2. 2 K. Uomi · #26,081 worldwide 506 citations · 55 works
  3. 3 Tsuyoshi Matsuda · #39,529 worldwide 348 citations · 47 works
  4. 4 Masahiko Kondow · #41,084 worldwide 480 citations · 52 works
  5. 5 Y. Yazawa · #63,542 worldwide 455 citations · 31 works
  6. 6 Osamu Nishii · #66,520 worldwide 46 citations · 75 works
  7. 7 K. Itoh · #81,183 worldwide 235 citations · 32 works
  8. 8 Hari Singh Nalwa · #86,756 worldwide 348 citations · 25 works
  9. 9 Atsushi Maki · #99,145 worldwide 194 citations · 37 works
  10. 10 Hideaki Koizumi · #105,899 worldwide 187 citations · 28 works
All ranked researchers at Hitachi (Japan)

Which keywords describe research at Hitachi (Japan)?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Deep Learning, Power Electronics, Machine Learning, Neural Networks, Thermal Management, Failure Analysis, Smart Grid and Numerical Simulation.

▲ 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. Deep Learning118▲ 2.1×71 topics
  2. Machine Learning85▲ 1.61×69 topics
  3. Neural Networks64▲ 2.5×33 topics
  4. Power Electronics52▲ 9.6×8 topics
  5. Renewable Energy42▲ 1.82×34 topics
  6. Energy Efficiency39▲ 2.5×33 topics
  7. Thermal Management38▲ 7.0×7 topics
  8. Mechanical Properties36▲ 2.3×34 topics
  9. Smart Grid36▲ 5.9×9 topics
  10. Failure Analysis33▲ 21×7 topics
  11. Security32▲ 3.1×15 topics
  12. Numerical Simulation32▲ 6.7×12 topics
  13. Renewable Energy Integration30▲ 5.5×6 topics
  14. Fluid Dynamics26▲ 12×6 topics
  15. Fault Detection24▲ 10×3 topics
  16. Electric Vehicles24▲ 4.9×4 topics
  17. Finite Element Method23▲ 15×7 topics
  18. High-Temperature Electronics23▲ 23×2 topics
  19. Material Properties22▲ 14×3 topics
  20. Structural Analysis22▲ 14×6 topics
  21. Thermal Analysis22▲ 11×8 topics
  22. Reliability22▲ 18×3 topics
  23. Control Systems22▲ 7.2×8 topics
  24. X-ray Photoelectron Spectroscopy21▲ 17×2 topics
  25. Design Optimization21▲ 33×2 topics
  26. Mechanical Engineering21▲ 33×2 topics
  27. Fatigue Analysis21▲ 42×2 topics
  28. Product Development21▲ 24×2 topics
  29. Nanoelectronics21▲ 14×2 topics
  30. Power Devices20▲ 18×2 topics
  31. Semiconductor Devices19▲ 16×2 topics
  32. Control Strategies19▲ 8.1×5 topics
  33. Atomic Layer Deposition18▲ 16×1 topic
  34. High-k Dielectrics18▲ 16×1 topic
  35. Distributed Generation18▲ 14×3 topics
  36. Silicon Carbide18▲ 23×1 topic
  37. Wide Bandgap Semiconductors18▲ 26×1 topic
  38. Induction Motors18▲ 24×2 topics
  39. Electron Inelastic Mean Free Paths17▲ 54×1 topic
  40. Scanning Electron Microscopy17▲ 45×1 topic

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

By volume in 2022–2025: Engineering Applied Research, Semiconductor materials and devices, Silicon Carbide Semiconductor Technologies and Electron and X-Ray Spectroscopy Techniques.

Engineering Applied Rese…20Engineering Applied Research: 20 fractional worksSemiconductor materials …18Semiconductor materials and devices: 18 fractional worksSilicon Carbide Semicond…18Silicon Carbide Semiconductor Technologies: 18 fractional worksElectron and X-Ray Spect…17Electron and X-Ray Spectroscopy Techniques: 17 fractional worksElectric Motor Design and Analysis: 14 fractional worksManufacturing Process and Optimization: 13 fractional worksAdvanced Battery Technol…12Advanced Battery Technologies Research: 12 fractional worksMagnetic Properties and Applications: 11 fractional worksAdvancements in Semiconductor Devices and Circuit Design: 11 fractional worksIndustrial Vision System…11Industrial Vision Systems and Defect Detection: 11 fractional works
Civil and Structural EngineeringElectrical and Electronic EngineeringSurfaces, Coatings and FilmsIndustrial and Manufacturing Engineering2 others

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

  1. 1 Engineering Applied ResearchCivil and Structural Engineering 20 works
  2. 2 Semiconductor materials and devicesElectrical and Electronic Engineering 18 works
  3. 3 Silicon Carbide Semiconductor TechnologiesElectrical and Electronic Engineering 18 works
  4. 4 Electron and X-Ray Spectroscopy TechniquesSurfaces, Coatings and Films 17 works
  5. 5 Electric Motor Design and AnalysisElectrical and Electronic Engineering 14 works
  6. 6 Manufacturing Process and OptimizationIndustrial and Manufacturing Engineering 13 works
  7. 7 Advanced Battery Technologies ResearchAutomotive Engineering 12 works
  8. 8 Magnetic Properties and ApplicationsElectronic, Optical and Magnetic Materials 11 works
  9. 9 Advancements in Semiconductor Devices and Circuit DesignElectrical and Electronic Engineering 11 works
  10. 10 Industrial Vision Systems and Defect DetectionIndustrial and Manufacturing Engineering 11 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 available26.2%not open73.8%

World: 28% of research is openly available.

with international co-authors8.5%domestic only91.5%

World: 19% is written across borders.

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

Output in 2018–2022 was 21% 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.