Science Explorer Interactive view Map
Company · Tokyo · Japan

NTT (Japan)

In research, NTT (Japan) stands highest in Engineering (#1,170 of 6,636 worldwide), Physical Sciences (#2,976 of 12,888 worldwide) and Electrical and Electronic Engineering (#561 of 2,318 worldwide), 2022–2025. Relative to its size it is most specialised in Signal Processing, Electrical and Electronic Engineering and Computer Networks and Communications — Signal Processing is 12.9× its share of world research.

ntt.co.jp/index_e.htmlROR OpenAlex
World rank, 2022–2025
#5,238
of 28,054 · #472 all time
Rank in Japan
#126
of 1,070
Research works
30k
▼ 22% vs 2013–17
Citations
516k
17.5 per fractional work
Top-10% rate
8.3%
record average 16.5%
Open access
15%
world 28%

What is NTT (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 #1,170 of 6,636 6.6%913 #141
Physical SciencesDomain #2,976 of 12,888 8.1%1,658 #319
Electrical and Electronic EngineeringSubfield #561 of 2,318 6.6%662 #45
Computer ScienceField #1,178 of 4,667 10.9%585 #288
Artificial IntelligenceSubfield #720 of 1,884 15.4%200 #168
Physics and AstronomyField #1,062 of 1,646 7.6%82 #138
Signal ProcessingSubfield #114 of 150 17.8%76 #52
Social SciencesDomain #8,239 of 10,521 10.1%145 #3006
Life SciencesDomain #7,200 of 7,800 6.7%81 #5124
Computer Networks and CommunicationsSubfield #661 of 705 4.3%135 #175

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 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#141 #1,170
  2. Physical Sciences#319 #2,976
  3. Electrical and Electronic Engineering#45 #561
  4. Computer Science#288 #1,178
  5. Artificial Intelligence#168 #720
  6. Physics and Astronomy#138 #1,062
  7. Signal Processing#52 #114
  8. Social Sciences#3,006 #8,239
  9. Life Sciences#5,124 #7,200
  10. Computer Networks and Communications#175 #661
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 NTT (Japan) specialise in?

Where its research is concentrated relative to its size: Signal Processing takes 12.9× the share of its output that it takes of world research.

  1. Signal ProcessingSubfield · 75.6 works13×
  2. Electrical and Electronic EngineeringSubfield · 661.8 works9.6×
  3. Computer Networks and CommunicationsSubfield · 135.2 works7.9×
  4. Media TechnologySubfield · 39.7 works6.6×
← 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: 0.07× its world share, 6 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.12× its world share, 12 worksBiochemistry, Geneti…Immunology and Microbiology: 0.02× its world share, 0 worksImmunology and Micro…Neuroscience: 1.97× its world share, 62 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.08× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 0.24× its world share, 2 worksChemical EngineeringChemistry: 0.11× its world share, 3 worksChemistryComputer Science: 3.91× its world share, 585 worksComputer ScienceEarth and Planetary Sciences: 0.39× its world share, 12 worksEarth and Planetary …Energy: 0.38× its world share, 7 worksEnergyEngineering: 3.16× its world share, 913 worksEngineeringEnvironmental Science: 0.12× its world share, 12 worksEnvironmental ScienceMaterials Science: 0.37× its world share, 25 worksMaterials ScienceMathematics: 0.79× its world share, 18 worksMathematicsPhysics and Astronomy: 1.92× its world share, 82 worksPhysics and AstronomyDentistry: 0.01× its world share, 0 worksDentistryHealth Professions: 0.20× its world share, 10 worksHealth ProfessionsMedicine: 0.09× its world share, 32 worksMedicineNursing: 0.08× its world share, 1 worksNursingVeterinary: 0.04× its world share, 0 worksVeterinaryArts and Humanities: 0.13× its world share, 7 worksArts and HumanitiesBusiness, Management and Accounting: 0.30× its world share, 19 worksBusiness, Management…Decision Sciences: 1.20× its world share, 22 worksDecision SciencesEconomics, Econometrics and Finance: 0.12× its world share, 5 worksEconomics, Econometr…Psychology: 0.82× its world share, 48 worksPsychologySocial Sciences: 0.18× its world share, 43 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Computer Science, 3.9×. Every wedge is a field page.

Who are the top researchers at NTT (Japan)?

Ranked on the composite score, Masahiko Jinno, Akira Hirano and H. Takara lead among researchers whose main affiliation is NTT (Japan).

  1. 1 Masahiko Jinno Japan · #7,636 worldwide 878 citations · 71 works
  2. 2 Akira Hirano Japan · #17,121 worldwide 454 citations · 59 works
  3. 3 H. Takara Japan · #17,666 worldwide 601 citations · 56 works
  4. 4 K. Okamoto Japan · #32,113 worldwide 383 citations · 38 works
  5. 5 Tatsuaki Okamoto Japan · #34,745 worldwide 702 citations · 55 works
  6. 6 Mitsuhiro Tateda Japan · #39,110 worldwide 347 citations · 42 works
  7. 7 Minoru Kobayashi Japan · #42,516 worldwide 255 citations · 56 works
  8. 8 R. M. Bozorth Japan · #54,860 worldwide 530 citations · 29 works
  9. 9 Takuya Yoshioka Japan · #54,901 worldwide 458 citations · 48 works
  10. 10 R. G. Shulman Japan · #56,119 worldwide 343 citations · 30 works
All ranked researchers at NTT (Japan)

Which keywords describe research at NTT (Japan)?

By fractional works in 2022–2025, 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 2022–2025 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 Learning209▲ 3.2×69 topics
  2. Optical Fiber149▲ 72×3 topics
  3. Digital Signal Processing121▲ 129×2 topics
  4. Coherent Detection121▲ 145×1 topic
  5. Nonlinear Effects121▲ 145×1 topic
  6. Energy Efficiency116▲ 6.4×19 topics
  7. Microwave Photonics113▲ 66×2 topics
  8. Neural Networks109▲ 3.7×29 topics
  9. Integrated Circuits104▲ 34×3 topics
  10. Biosensors99▲ 10.0×8 topics
  11. Optical Modulators96▲ 34×3 topics
  12. Optical Access Networks93▲ 146×1 topic
  13. Photonic Signal Processing93▲ 146×1 topic
  14. Machine Learning93▲ 1.48×69 topics
  15. Raman Lasers92▲ 42×2 topics
  16. Microcavities91▲ 42×2 topics
  17. Silicon Photonics91▲ 44×2 topics
  18. Nanophotonic Waveguides90▲ 48×1 topic
  19. Whispering Gallery Mode90▲ 48×1 topic
  20. Convolutional Neural Networks73▲ 5.2×13 topics
  21. Semiconductor Lasers66▲ 51×2 topics
  22. Beamforming65▲ 32×4 topics
  23. Wireless Networks56▲ 19×9 topics
  24. Elastic Optical Networks56▲ 181×1 topic
  25. Optical Networks56▲ 181×1 topic
  26. Optical Interconnects53▲ 74×1 topic
  27. Vertical-Cavity Surface-Emitting Lasers (VCSELs)53▲ 74×1 topic
  28. 5G52▲ 48×3 topics
  29. Channel Modeling50▲ 21×6 topics
  30. Massive MIMO47▲ 30×3 topics
  31. 5G Networks41▲ 10×5 topics
  32. Deep Neural Networks37▲ 18×3 topics
  33. MIMO Systems37▲ 24×3 topics
  34. Hidden Markov Models36▲ 32×3 topics
  35. Audio-Visual Speech Recognition35▲ 34×1 topic
  36. Speech Enhancement35▲ 34×1 topic
  37. Distributed Systems35▲ 11×6 topics
  38. Acoustic Modeling34▲ 47×1 topic
  39. Speaker Verification34▲ 47×1 topic
  40. Nonlinear Optics34▲ 16×4 topics

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

By volume in 2022–2025: Optical Network Technologies, Advanced Photonic Communication Systems, Photonic and Optical Devices and Advanced Optical Network Technologies.

Optical Network Technolo…121Optical Network Technologies: 121 fractional worksAdvanced Photonic Communication Systems: 93 fractional worksPhotonic and Optical Devices: 90 fractional worksAdvanced Optical Network Technologies: 56 fractional worksSemiconductor Lasers and Optical Devices: 53 fractional worksSpeech and Audio Process…35Speech and Audio Processing: 35 fractional worksSpeech Recognition and Synthesis: 34 fractional worksMillimeter-Wave Propagation and Modeling: 28 fractional worksAdvanced Fiber Optic Sensors: 26 fractional worksTelecommunications and Broadcasting Technologies: 24 fractional works
Electrical and Electronic EngineeringSignal ProcessingArtificial IntelligenceMedia Technology

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

  1. 1 Optical Network Technologies Electrical and Electronic Engineering 121 works
  2. 2 Advanced Photonic Communication Systems Electrical and Electronic Engineering 93 works
  3. 3 Photonic and Optical Devices Electrical and Electronic Engineering 90 works
  4. 4 Advanced Optical Network Technologies Electrical and Electronic Engineering 56 works
  5. 5 Semiconductor Lasers and Optical Devices Electrical and Electronic Engineering 53 works
  6. 6 Speech and Audio Processing Signal Processing 35 works
  7. 7 Speech Recognition and Synthesis Artificial Intelligence 34 works
  8. 8 Millimeter-Wave Propagation and Modeling Electrical and Electronic Engineering 28 works
  9. 9 Advanced Fiber Optic Sensors Electrical and Electronic Engineering 26 works
  10. 10 Telecommunications and Broadcasting Technologies Media Technology 24 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 available14.8%not open85.2%

World: 28% of research is openly available.

with international co-authors6.7%domestic only93.3%

World: 19% is written across borders.

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

Output in 2018–2022 was 22% 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.