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Company · Tokyo · Japan

NTT (Japan)

In research, NTT (Japan) stands highest in Physical Sciences (#1,313 of 10,670 worldwide), Electrical and Electronic Engineering (#392 of 2,176 worldwide) and Engineering (#1,279 of 5,901 worldwide), 2022-now. Relative to its size it is most specialised in Signal Processing, Electrical and Electronic Engineering and Hardware and Architecture (Signal Processing is 12.0× its share of world research).

ntt.co.jp/index_e.htmlROR OpenAlex
World rank, 2022-now
#3,652
of 22,385 · #2,410 all time
Rank in Japan
#74
of 924
Research works
32k
▼ 4% vs 2018-21
Citations
558k
17.5 per fractional work
Top-10% rate
6.6%
all institutions 10.0%
vs its own fields
0.68×
1.00× is exactly expected
Open access
15%
world 40%
International
9%
world 18%
NTT (Japan)

What is NTT (Japan) known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #1,313 of 10,670 6.9%1,726 #1400
Electrical and Electronic EngineeringSubfield #392 of 2,176 9.0%677 #423
EngineeringField #1,279 of 5,901 7.6%936 #1160
Computer ScienceField #1,010 of 4,417 6.0%618 #839
Artificial IntelligenceSubfield #755 of 1,862 7.2%219 #816
Signal ProcessingSubfield #112 of 169 10.8%77 #340
Physics and AstronomyField #964 of 1,417 7.7%91 #1004
Computer Vision and Pattern RecognitionSubfield #705 of 963 5.7%80 #1017
Atomic and Molecular Physics, and OpticsSubfield #432 of 547 8.4%68 #531
Computer Networks and CommunicationsSubfield #592 of 728 2.5%140 #812

Each strip is that field's whole ranked pool, with the notch where NTT (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 average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022-now. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Physical Sciences#1,400 #1,313
  2. Electrical and Electronic Engineering#423 #392
  3. Engineering#1,160 #1,279
  4. Computer Science#839 #1,010
  5. Artificial Intelligence#816 #755
  6. Signal Processing#340 #112
  7. Physics and Astronomy#1,004 #964
  8. Computer Vision and Pattern Recognition#1,017 #705
  9. Atomic and Molecular Physics, and Optics#531 #432
  10. Computer Networks and Communications#812 #592
all time2022-now, better2022-now, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

Which fields of science does NTT (Japan) work in?

In 2022-now, 85% of research at NTT (Japan) is in Physical Sciences, 8% in Social Sciences. Its largest fields are Engineering (46%), Computer Science (31%), Physics and Astronomy (5%). It does 2.2× the world's share of Physical Sciences.

Physical Sciences: 1,899 fractional works · 85.2% of its workEngineering: 1,015 fractional works · 45.6% of its workElectrical and Electronic Engineering: 735 fractional works · 33.0% of its workAerospace Engineering: 54 fractional works · 2.4% of its workBiomedical Engineering: 49 fractional works · 2.2% of its workMedia Technology: 41 fractional works · 1.9% of its workControl and Systems Engineering: 36 fractional works · 1.6% of its workCivil and Structural Engineering: 19 fractional works · 0.9% of its workComputational Mechanics: 17 fractional works · 0.8% of its workMechanical Engineering: 16 fractional works · 0.7% of its workOcean Engineering: 11 fractional works · 0.5% of its workIndustrial and Manufacturing Engineering: 10 fractional works · 0.4% of its workAutomotive Engineering: 8 fractional works · 0.4% of its workSafety, Risk, Reliability and Quality: 6 fractional works · 0.3% of its workBuilding and Construction: 6 fractional works · 0.3% of its workMechanics of Materials: 4 fractional works · 0.2% of its workComputer Science: 691 fractional works · 31.0% of its workArtificial Intelligence: 246 fractional works · 11.0% of its workComputer Networks and Communications: 157 fractional works · 7.0% of its workComputer Vision and Pattern Recognition: 87 fractional works · 3.9% of its workSignal Processing: 81 fractional works · 3.7% of its workInformation Systems: 47 fractional works · 2.1% of its workHardware and Architecture: 22 fractional works · 1.0% of its workHuman-Computer Interaction: 20 fractional works · 0.9% of its workComputational Theory and Mathematics: 17 fractional works · 0.8% of its workSoftware: 7 fractional works · 0.3% of its workSmaller subfields together: 8 fractional works · 0.4% of its workPhysics and Astronomy: 100 fractional works · 4.5% of its workAtomic and Molecular Physics, and Optics: 74 fractional works · 3.3% of its workStatistical and Nonlinear Physics: 10 fractional works · 0.5% of its workInstrumentation: 4 fractional works · 0.2% of its workSmaller subfields together: 12 fractional works · 0.5% of its workMaterials Science: 26 fractional works · 1.2% of its workMaterials Chemistry: 13 fractional works · 0.6% of its workElectronic, Optical and Magnetic Materials: 7 fractional works · 0.3% of its workSmaller subfields together: 7 fractional works · 0.3% of its workMathematics: 20 fractional works · 0.9% of its workMathematical Physics: 6 fractional works · 0.3% of its workStatistics and Probability: 5 fractional works · 0.2% of its workSmaller subfields together: 10 fractional works · 0.4% of its workEnvironmental Science: 18 fractional works · 0.8% of its workEnvironmental Engineering: 5 fractional works · 0.2% of its workSmaller subfields together: 14 fractional works · 0.6% of its workEarth and Planetary Sciences: 14 fractional works · 0.6% of its workEnergy: 8 fractional works · 0.3% of its workRenewable Energy, Sustainability and the Environment: 5 fractional works · 0.2% of its workSmaller subfields together: 3 fractional works · 0.1% of its workChemistry: 3 fractional works · 0.2% of its workChemical Engineering: 2 fractional works · 0.1% of its workSocial Sciences: 179 fractional works · 8.0% of its workPsychology: 57 fractional works · 2.6% of its workSocial Psychology: 22 fractional works · 1.0% of its workExperimental and Cognitive Psychology: 20 fractional works · 0.9% of its workDevelopmental and Educational Psychology: 6 fractional works · 0.3% of its workClinical Psychology: 6 fractional works · 0.3% of its workSmaller subfields together: 3 fractional works · 0.1% of its workSocial Sciences: 55 fractional works · 2.5% of its workSociology and Political Science: 24 fractional works · 1.1% of its workTransportation: 7 fractional works · 0.3% of its workEducation: 7 fractional works · 0.3% of its workSmaller subfields together: 17 fractional works · 0.7% of its workBusiness, Management and Accounting: 26 fractional works · 1.2% of its workManagement Information Systems: 7 fractional works · 0.3% of its workSmaller subfields together: 19 fractional works · 0.9% of its workDecision Sciences: 25 fractional works · 1.1% of its workManagement Science and Operations Research: 11 fractional works · 0.5% of its workInformation Systems and Management: 10 fractional works · 0.4% of its workSmaller subfields together: 4 fractional works · 0.2% of its workArts and Humanities: 9 fractional works · 0.4% of its workEconomics, Econometrics and Finance: 7 fractional works · 0.3% of its workEconomics and Econometrics: 6 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.0% of its workLife Sciences: 94 fractional works · 4.2% of its workNeuroscience: 70 fractional works · 3.1% of its workCognitive Neuroscience: 63 fractional works · 2.8% of its workSmaller subfields together: 7 fractional works · 0.3% of its workBiochemistry, Genetics and Molecular Biology: 15 fractional works · 0.7% of its workMolecular Biology: 8 fractional works · 0.4% of its workSmaller subfields together: 7 fractional works · 0.3% of its workAgricultural and Biological Sciences: 8 fractional works · 0.4% of its workImmunology and Microbiology: 1 fractional works · 0.0% of its workPharmacology, Toxicology and Pharmaceutics: 1 fractional works · 0.0% of its workHealth Sciences: 57 fractional works · 2.5% of its workMedicine: 43 fractional works · 1.9% of its workPulmonary and Respiratory Medicine: 7 fractional works · 0.3% of its workCardiology and Cardiovascular Medicine: 6 fractional works · 0.3% of its workSmaller subfields together: 30 fractional works · 1.3% of its workHealth Professions: 13 fractional works · 0.6% of its workNursing: 1 fractional works · 0.0% of its workALL ITS WORKNTT (Japan)2,229fractional works, 2022-now
Life Sciences4%Physical Sciences85%Health Sciences3%Social Sciences8%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 26 fields, with their numbers
    1. Engineering1,01545.6%
    2. Computer Science69131.0%
    3. Physics and Astronomy1004.5%
    4. Materials Science261.2%
    5. Mathematics200.9%
    6. Environmental Science180.8%
    7. Earth and Planetary Sciences140.6%
    8. Energy80.3%
    9. Chemistry30.2%
    10. Chemical Engineering20.1%
    1. Psychology572.6%
    2. Social Sciences552.5%
    3. Business, Management and Accounting261.2%
    4. Decision Sciences251.1%
    5. Arts and Humanities90.4%
    6. Economics, Econometrics and Finance70.3%
    1. Neuroscience703.1%
    2. Biochemistry, Genetics and Molecular Biology150.7%
    3. Agricultural and Biological Sciences80.4%
    4. Immunology and Microbiology10.0%
    5. Pharmacology, Toxicology and Pharmaceutics10.0%
    1. Medicine431.9%
    2. Health Professions130.6%
    3. Nursing10.0%
    4. Dentistry00.0%
    5. Veterinary00.0%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does NTT (Japan) specialise in?

Where its research is concentrated relative to its size: Signal Processing takes 12.0× the share of its output that it takes of world research.

  1. Signal ProcessingSubfield · 81.4 works12×
  2. Electrical and Electronic EngineeringSubfield · 735.5 works9.3×
  3. Hardware and ArchitectureSubfield · 21.9 works8.7×
  4. Computer Networks and CommunicationsSubfield · 156.7 works7.9×
  5. Media TechnologySubfield · 41.5 works5.9×
  6. Atomic and Molecular Physics, and OpticsSubfield · 73.5 works4.6×
← 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: 0.08× its world share, 8 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.12× its world share, 15 worksBiochemistry, Geneti…Immunology and Microbiology: 0.03× its world share, 1 worksImmunology and Micro…Neuroscience: 1.93× its world share, 70 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.08× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 0.21× its world share, 2 worksChemical EngineeringChemistry: 0.10× its world share, 3 worksChemistryComputer Science: 3.99× its world share, 691 worksComputer ScienceEarth and Planetary Sciences: 0.40× its world share, 14 worksEarth and Planetary …Energy: 0.38× its world share, 8 worksEnergyEngineering: 3.04× its world share, 1,015 worksEngineeringEnvironmental Science: 0.16× its world share, 18 worksEnvironmental ScienceMaterials Science: 0.34× its world share, 26 worksMaterials ScienceMathematics: 0.78× its world share, 20 worksMathematicsPhysics and Astronomy: 2.02× its world share, 100 worksPhysics and AstronomyDentistry: 0.01× its world share, 0 worksDentistryHealth Professions: 0.22× its world share, 13 worksHealth ProfessionsMedicine: 0.10× its world share, 43 worksMedicineNursing: 0.07× its world share, 1 worksNursingVeterinary: 0.04× its world share, 0 worksVeterinaryArts and Humanities: 0.13× its world share, 9 worksArts and HumanitiesBusiness, Management and Accounting: 0.37× its world share, 26 worksBusiness, Management…Decision Sciences: 1.18× its world share, 25 worksDecision SciencesEconomics, Econometrics and Finance: 0.15× its world share, 7 worksEconomics, Econometr…Psychology: 0.84× its world share, 57 worksPsychologySocial Sciences: 0.19× its world share, 55 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Computer Science, 4.0×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Computer Science3.99×691 works
  2. Engineering3.04×1,015 works
  3. Physics and Astronomy2.02×100 works
  4. Neuroscience1.93×70 works
  5. Decision Sciences1.18×25 works
  6. Psychology0.84×57 works
  7. Mathematics0.78×20 works
  8. Earth and Planetary Sciences0.40×14 works
  9. Energy0.38×8 works
  10. Business, Management and Accounting0.37×26 works
  11. Materials Science0.34×26 works
  12. Health Professions0.22×13 works
  13. Chemical Engineering0.21×2 works
  14. Social Sciences0.19×55 works
  15. Environmental Science0.16×18 works
  16. Economics, Econometrics and Finance0.15×7 works
  17. Arts and Humanities0.13×9 works
  18. Biochemistry, Genetics and Molecular Biology0.12×15 works
  19. Chemistry0.10×3 works
  20. Medicine0.10×43 works
  21. Agricultural and Biological Sciences0.08×8 works
  22. Pharmacology, Toxicology and Pharmaceutics0.08×1 works
  23. Nursing0.07×1 works
  24. Veterinary0.04×0 works
  25. Immunology and Microbiology0.03×1 works
  26. Dentistry0.01×0 works

Who are the top researchers at NTT (Japan)?

Ranked on the quality score, Suguru Endo, Sho W. Suzuki and Takuya Yoshioka lead among researchers whose main affiliation is NTT (Japan).

  1. 1 Suguru Endo Japan · #309,609 worldwide 4.4k citations · 62 works
  2. 2 Sho W. Suzuki Japan · #389,627 worldwide 3.6k citations · 104 works
  3. 3 Takuya Yoshioka Japan · #426,409 worldwide 9.7k citations · 242 works
  4. 4 Kazuo Aoyama Japan · #633,535 worldwide 1.8k citations · 97 works
  5. 5 Keisuke Kinoshita Japan · #905,361 worldwide 9.7k citations · 369 works
  6. 6 Takahiro Kashiwazaki #1,202,189 worldwide 636 citations · 119 works
  7. 7 Tatsuaki Okamoto Japan · #1,219,630 worldwide 13k citations · 183 works
  8. 8 Kenichi Endo #1,298,537 worldwide 514 citations · 49 works
  9. 9 Hiroaki Gomi #1,321,833 worldwide 6.8k citations · 211 works
  10. 10 Yoshimitsu ARAI Japan · #1,347,591 worldwide 7.3k citations · 78 works
All ranked researchers at NTT (Japan)

What are the most cited papers from NTT (Japan)?

The most cited paper from NTT (Japan) is "GaAs, AlAs, and Al x Ga1− x As: Material parameters for use in research and device applications" (Sadao Adachi, 1985), with 3,287 citations. Next come "Variational quantum algorithms" (3,280) and "Empirical formula for propagation loss in land mobile radio services" (2,803).

Most cited papers
#PaperReleasedCitations
1 GaAs, AlAs, and Al x Ga1− x As: Material parameters for use in research and device applications Sadao Adachi · Journal of Applied Physics Aug 1985 3,287
2 Variational quantum algorithms M. Cerezo, Andrew Arrasmith, Ryan Babbush et al. · Nature Reviews Physics ReviewOpen access 12 Aug 2021 3,280
3 Empirical formula for propagation loss in land mobile radio services Masayuki Hata · IEEE Transactions on Vehicular Technology Aug 1980 2,803
4 Non-Orthogonal Multiple Access (NOMA) for Cellular Future Radio Access Yuya Saito, Yoshihisa Kishiyama, Anass Benjebbour et al. Conference paper Jun 2013 2,557
5 5G: A Tutorial Overview of Standards, Trials, Challenges, Deployment, and Practice Mansoor Shafi, Andreas F. Molisch, Peter J. Smith et al. · IEEE Journal on Selected Areas in Communications 7 Apr 2017 2,356
All 60 most cited papers, with filters and sorting

Which keywords describe research at NTT (Japan)?

By fractional works in 2022-now, weighted toward what it does more of than the world: Optical Fiber, Deep Learning, Digital Signal Processing, Coherent Detection, Nonlinear Effects, Microwave Photonics, Energy Efficiency and Integrated Circuits.

▲ 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-now 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 Learning238▲ 3.1×71 topics
  2. Optical Fiber165▲ 71×3 topics
  3. Digital Signal Processing134▲ 126×2 topics
  4. Coherent Detection134▲ 143×1 topic
  5. Nonlinear Effects134▲ 143×1 topic
  6. Energy Efficiency133▲ 6.4×20 topics
  7. Microwave Photonics124▲ 66×2 topics
  8. Neural Networks122▲ 3.6×29 topics
  9. Integrated Circuits113▲ 35×3 topics
  10. Machine Learning110▲ 1.48×69 topics
  11. Biosensors110▲ 10×8 topics
  12. Optical Modulators107▲ 34×3 topics
  13. Optical Access Networks101▲ 143×1 topic
  14. Photonic Signal Processing101▲ 143×1 topic
  15. Microcavities100▲ 43×2 topics
  16. Raman Lasers100▲ 43×2 topics
  17. Silicon Photonics100▲ 45×2 topics
  18. Nanophotonic Waveguides99▲ 50×1 topic
  19. Whispering Gallery Mode99▲ 50×1 topic
  20. Convolutional Neural Networks79▲ 4.9×13 topics
  21. Semiconductor Lasers75▲ 50×2 topics
  22. Beamforming74▲ 32×4 topics
  23. Wireless Networks63▲ 19×9 topics
  24. Elastic Optical Networks61▲ 172×1 topic
  25. Optical Networks61▲ 172×1 topic
  26. 5G57▲ 44×3 topics
  27. Channel Modeling56▲ 21×6 topics
  28. Optical Interconnects55▲ 72×1 topic
  29. Vertical-Cavity Surface-Emitting Lasers (VCSELs)55▲ 72×1 topic
  30. Massive MIMO54▲ 30×3 topics
  31. 5G Networks50▲ 11×5 topics
  32. MIMO Systems43▲ 25×3 topics
  33. Deep Neural Networks42▲ 15×3 topics
  34. Distributed Systems41▲ 11×6 topics
  35. Nonlinear Optics40▲ 17×4 topics
  36. Hidden Markov Models40▲ 30×3 topics
  37. Audio-Visual Speech Recognition39▲ 34×1 topic
  38. Speech Enhancement39▲ 34×1 topic
  39. Acoustic Modeling37▲ 45×1 topic
  40. Speaker Verification37▲ 45×1 topic

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

By volume in 2022-now: Optical Network Technologies, Advanced Photonic Communication Systems, Photonic and Optical Devices and Advanced Optical Network Technologies.

Optical Network Technolo…134Optical Network Technologies: 134 fractional worksAdvanced Photonic Communication Systems: 101 fractional worksPhotonic and Optical Devices: 99 fractional worksAdvanced Optical Network Technologies: 61 fractional worksSemiconductor Lasers and Optical Devices: 55 fractional worksSpeech and Audio Process…39Speech and Audio Processing: 39 fractional worksSpeech Recognition and Synthesis: 37 fractional worksMillimeter-Wave Propagation and Modeling: 31 fractional worksAdvanced Fiber Optic Sensors: 29 fractional worksAdvanced MIMO Systems Optimization: 26 fractional works
Electrical and Electronic EngineeringSignal ProcessingArtificial Intelligence

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

  1. 1 Optical Network Technologies Electrical and Electronic Engineering 134 works
  2. 2 Advanced Photonic Communication Systems Electrical and Electronic Engineering 101 works
  3. 3 Photonic and Optical Devices Electrical and Electronic Engineering 99 works
  4. 4 Advanced Optical Network Technologies Electrical and Electronic Engineering 61 works
  5. 5 Semiconductor Lasers and Optical Devices Electrical and Electronic Engineering 55 works
  6. 6 Speech and Audio Processing Signal Processing 39 works
  7. 7 Speech Recognition and Synthesis Artificial Intelligence 37 works
  8. 8 Millimeter-Wave Propagation and Modeling Electrical and Electronic Engineering 31 works
  9. 9 Advanced Fiber Optic Sensors Electrical and Electronic Engineering 29 works
  10. 10 Advanced MIMO Systems Optimization Electrical and Electronic Engineering 26 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 available15.1%not open84.9%

World: 40% of research is openly available.

with international co-authors9.2%domestic only90.8%

World: 18% is written across borders.

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

Output in 2022-2025 was 4% lower than in 2018-2021.

still counting1990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is NTT (Japan) as a percentage of every work published that year, 0.010% in 2024.

still counting0.050%0.10%0.15%NTT (Japan)0.0086% in 202519801990200020102020

Fractional works of NTT (Japan) over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025NTT (Japan)6.6% in 2025200020102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 14.1% in 1990.

Other research institutions in Tokyo

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NTT (Japan) on Science Explorer

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