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Company · Fujimino · Japan

KDDI Research (Japan)

In research, KDDI Research (Japan) stands highest in Physical Sciences (#3,609 of 10,670 worldwide), Computer Science (#1,805 of 4,417 worldwide) and Electrical and Electronic Engineering (#993 of 2,176 worldwide), 2022-now. Relative to its size it is most specialised in Electrical and Electronic Engineering, Computer Networks and Communications and Artificial Intelligence (Electrical and Electronic Engineering is 8.9× its share of world research).

kddi-research.jpROR OpenAlex
World rank, 2022-now
#8,665
of 22,385 · #5,352 all time
Rank in Japan
#201
of 924
Research works
2.4k
▲ 28% vs 2018-21
Citations
20k
8.3 per fractional work
Top-10% rate
4.8%
all institutions 10.0%
vs its own fields
0.84×
1.00× is exactly expected
Open access
14%
world 40%
International
10%
world 18%
KDDI Research (Japan)

What is KDDI Research (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 #3,609 of 10,670 4.1%441 #2282
Computer ScienceField #1,805 of 4,417 4.0%185 #1823
Electrical and Electronic EngineeringSubfield #993 of 2,176 5.6%163 #723
EngineeringField #3,248 of 5,901 4.4%235 #2197
Artificial IntelligenceSubfield #1,352 of 1,862 4.3%68 #1904

Each strip is that field's whole ranked pool, with the notch where KDDI Research (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#2,282 #3,609
  2. Computer Science#1,823 #1,805
  3. Electrical and Electronic Engineering#723 #993
  4. Engineering#2,197 #3,248
  5. Artificial Intelligence#1,904 #1,352
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 KDDI Research (Japan) work in?

In 2022-now, 88% of research at KDDI Research (Japan) is in Physical Sciences, 8% in Social Sciences. Its largest fields are Engineering (46%), Computer Science (38%), Social Sciences (4%). It does 2.2× the world's share of Physical Sciences.

Physical Sciences: 477 fractional works · 87.9% of its workEngineering: 250 fractional works · 46.0% of its workElectrical and Electronic Engineering: 173 fractional works · 31.9% of its workAerospace Engineering: 23 fractional works · 4.2% of its workMedia Technology: 11 fractional works · 2.0% of its workComputational Mechanics: 9 fractional works · 1.6% of its workBiomedical Engineering: 8 fractional works · 1.5% of its workControl and Systems Engineering: 7 fractional works · 1.3% of its workMechanical Engineering: 4 fractional works · 0.8% of its workIndustrial and Manufacturing Engineering: 4 fractional works · 0.8% of its workBuilding and Construction: 4 fractional works · 0.7% of its workCivil and Structural Engineering: 3 fractional works · 0.6% of its workOcean Engineering: 2 fractional works · 0.5% of its workSmaller subfields together: 2 fractional works · 0.3% of its workComputer Science: 206 fractional works · 37.9% of its workArtificial Intelligence: 75 fractional works · 13.9% of its workComputer Networks and Communications: 38 fractional works · 7.0% of its workComputer Vision and Pattern Recognition: 34 fractional works · 6.3% of its workInformation Systems: 20 fractional works · 3.7% of its workSignal Processing: 14 fractional works · 2.7% of its workComputer Graphics and Computer-Aided Design: 10 fractional works · 1.9% of its workComputational Theory and Mathematics: 7 fractional works · 1.3% of its workHardware and Architecture: 3 fractional works · 0.5% of its workHuman-Computer Interaction: 3 fractional works · 0.5% of its workSoftware: 1 fractional works · 0.2% of its workPhysics and Astronomy: 10 fractional works · 1.8% of its workAtomic and Molecular Physics, and Optics: 7 fractional works · 1.4% of its workStatistical and Nonlinear Physics: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.2% of its workEarth and Planetary Sciences: 6 fractional works · 1.1% of its workGeophysics: 3 fractional works · 0.5% of its workOceanography: 2 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workEnvironmental Science: 3 fractional works · 0.6% of its workEnvironmental Engineering: 1 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.4% of its workMaterials Science: 2 fractional works · 0.3% of its workEnergy: 0 fractional works · 0.1% of its workMathematics: 0 fractional works · 0.1% of its workSocial Sciences: 46 fractional works · 8.4% of its workSocial Sciences: 20 fractional works · 3.6% of its workSociology and Political Science: 10 fractional works · 1.9% of its workTransportation: 6 fractional works · 1.1% of its workSmaller subfields together: 4 fractional works · 0.7% of its workPsychology: 12 fractional works · 2.1% of its workSocial Psychology: 4 fractional works · 0.7% of its workExperimental and Cognitive Psychology: 3 fractional works · 0.5% of its workClinical Psychology: 2 fractional works · 0.4% of its workApplied Psychology: 2 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.1% of its workBusiness, Management and Accounting: 5 fractional works · 0.9% of its workMarketing: 1 fractional works · 0.3% of its workBusiness and International Management: 1 fractional works · 0.2% of its workStrategy and Management: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.2% of its workDecision Sciences: 4 fractional works · 0.8% of its workManagement Science and Operations Research: 2 fractional works · 0.4% of its workInformation Systems and Management: 2 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workArts and Humanities: 4 fractional works · 0.7% of its workLiterature and Literary Theory: 2 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.4% of its workEconomics, Econometrics and Finance: 1 fractional works · 0.3% of its workLife Sciences: 12 fractional works · 2.3% of its workNeuroscience: 8 fractional works · 1.4% of its workCognitive Neuroscience: 6 fractional works · 1.2% of its workSmaller subfields together: 1 fractional works · 0.2% of its workBiochemistry, Genetics and Molecular Biology: 3 fractional works · 0.5% of its workMolecular Biology: 1 fractional works · 0.2% of its workBiophysics: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workAgricultural and Biological Sciences: 2 fractional works · 0.4% of its workPlant Science: 2 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.1% of its workHealth Sciences: 7 fractional works · 1.3% of its workMedicine: 6 fractional works · 1.1% of its workHealth Professions: 1 fractional works · 0.2% of its workVeterinary: 0 fractional works · 0.0% of its workNursing: 0 fractional works · 0.0% of its workALL ITS WORKKDDI Research(Japan)543fractional works, 2022-now
Life Sciences2%Physical Sciences88%Health Sciences1%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 22 fields, with their numbers
    1. Engineering25046.0%
    2. Computer Science20637.9%
    3. Physics and Astronomy101.8%
    4. Earth and Planetary Sciences61.1%
    5. Environmental Science30.6%
    6. Materials Science20.3%
    7. Energy00.1%
    8. Mathematics00.1%
    9. Chemical Engineering00.0%
    1. Social Sciences203.6%
    2. Psychology122.1%
    3. Business, Management and Accounting50.9%
    4. Decision Sciences40.8%
    5. Arts and Humanities40.7%
    6. Economics, Econometrics and Finance10.3%
    1. Neuroscience81.4%
    2. Biochemistry, Genetics and Molecular Biology30.5%
    3. Agricultural and Biological Sciences20.4%
    1. Medicine61.1%
    2. Health Professions10.2%
    3. Veterinary00.0%
    4. Nursing00.0%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does KDDI Research (Japan) specialise in?

Where its research is concentrated relative to its size: Electrical and Electronic Engineering takes 8.9× the share of its output that it takes of world research.

  1. Electrical and Electronic EngineeringSubfield · 173.0 works8.9×
  2. Computer Networks and CommunicationsSubfield · 37.9 works7.8×
  3. Artificial IntelligenceSubfield · 75.2 works5.7×
  4. Computer Vision and Pattern RecognitionSubfield · 34.3 works5.0×
  5. Computer ScienceField · 205.8 works4.9×
← 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, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.10× its world share, 3 worksBiochemistry, Geneti…Neuroscience: 0.87× its world share, 8 worksNeuroscienceChemical Engineering: 0.06× its world share, 0 worksChemical EngineeringComputer Science: 4.87× its world share, 206 worksComputer ScienceEarth and Planetary Sciences: 0.70× its world share, 6 worksEarth and Planetary …Energy: 0.07× its world share, 0 worksEnergyEngineering: 3.07× its world share, 250 worksEngineeringEnvironmental Science: 0.13× its world share, 3 worksEnvironmental ScienceMaterials Science: 0.09× its world share, 2 worksMaterials ScienceMathematics: 0.04× its world share, 0 worksMathematicsPhysics and Astronomy: 0.81× its world share, 10 worksPhysics and AstronomyHealth Professions: 0.08× its world share, 1 worksHealth ProfessionsMedicine: 0.06× its world share, 6 worksMedicineNursing: 0.05× its world share, 0 worksNursingVeterinary: 0.23× its world share, 0 worksVeterinaryArts and Humanities: 0.23× its world share, 4 worksArts and HumanitiesBusiness, Management and Accounting: 0.28× its world share, 5 worksBusiness, Management…Decision Sciences: 0.83× its world share, 4 worksDecision SciencesEconomics, Econometrics and Finance: 0.12× its world share, 1 worksEconomics, Econometr…Psychology: 0.70× its world share, 12 worksPsychologySocial Sciences: 0.29× its world share, 20 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Computer Science, 4.9×. Every wedge is a field page.

All 22 fields, with their numbers
  1. Computer Science4.87×206 works
  2. Engineering3.07×250 works
  3. Neuroscience0.87×8 works
  4. Decision Sciences0.83×4 works
  5. Physics and Astronomy0.81×10 works
  6. Earth and Planetary Sciences0.70×6 works
  7. Psychology0.70×12 works
  8. Social Sciences0.29×20 works
  9. Business, Management and Accounting0.28×5 works
  10. Veterinary0.23×0 works
  11. Arts and Humanities0.23×4 works
  12. Environmental Science0.13×3 works
  13. Economics, Econometrics and Finance0.12×1 works
  14. Biochemistry, Genetics and Molecular Biology0.10×3 works
  15. Materials Science0.09×2 works
  16. Health Professions0.08×1 works
  17. Agricultural and Biological Sciences0.07×2 works
  18. Energy0.07×0 works
  19. Chemical Engineering0.06×0 works
  20. Medicine0.06×6 works
  21. Nursing0.05×0 works
  22. Mathematics0.04×0 works

Who are the top researchers at KDDI Research (Japan)?

Ranked on the quality score, Nao Kobayashi, Toshitaka Hamamura and Donghuo Zeng lead among researchers whose main affiliation is KDDI Research (Japan).

  1. 1 Nao Kobayashi Japan · #1,175,501 worldwide 4.1k citations · 165 works
  2. 2 Toshitaka Hamamura Japan · #1,449,788 worldwide 446 citations · 58 works
  3. 3 Donghuo Zeng Japan · #1,895,101 worldwide 305 citations · 47 works
  4. 4 Anirban Basu Japan · #2,170,740 worldwide 2.1k citations · 101 works
  5. 5 Yanan Wang Japan · #2,422,876 worldwide 1.1k citations · 87 works
  6. 6 Amr Amrallah Japan · #2,553,086 worldwide 124 citations · 24 works
  7. 7 Yu Kawaguchi Japan · #2,678,523 worldwide 428 citations · 30 works
  8. 8 Kazushi Ikeda Japan · #2,734,570 worldwide 89 citations · 23 works
  9. 9 Koki Takeshima Japan · #2,940,431 worldwide 594 citations · 36 works
  10. 10 Wenzhen Xu Japan · #3,074,616 worldwide 112 citations · 23 works
All ranked researchers at KDDI Research (Japan)

What are the most cited papers from KDDI Research (Japan)?

The most cited paper from KDDI Research (Japan) is "Embedding Watermarks into Deep Neural Networks" (Yusuke Uchida, Yuki Nagai, Shigeyuki Sakazawa et al., 2017), with 691 citations. Next come "Privacy-friendly platform for healthcare data in cloud based on blockchain environment" (410) and "Ultrafast Fiber Pulsed Lasers Incorporating Carbon Nanotubes" (393).

Most cited papers
#PaperReleasedCitations
1 Embedding Watermarks into Deep Neural Networks Yusuke Uchida, Yuki Nagai, Shigeyuki Sakazawa et al. Conference paperOpen access 25 May 2017 691
2 Privacy-friendly platform for healthcare data in cloud based on blockchain environment Abdullah Al Omar, Md Zakirul Alam Bhuiyan, Anirban Basu et al. · Future Generation Computer Systems 8 Jan 2019 410
3 Ultrafast Fiber Pulsed Lasers Incorporating Carbon Nanotubes Sze Yun Set, Hiroshi Yaguchi, Yuichi Tanaka et al. · IEEE Journal of Selected Topics in Quantum Electronics 2004 393
4 Coherent Optical 25.8-Gb/s OFDM Transmission Over 4160-km SSMF Sander Lars Jansen, Itsuro Morita, Tim C. W. Schenk et al. · Journal of Lightwave Technology 2008 359
5 High-Rate Punctured Convolutional Codes for Soft Decision Viterbi Decoding Y. Yasuda, Kanshiro Kashiki, Yasuo Hirata · IRE Transactions on Communications Systems Mar 1984 344
All 60 most cited papers, with filters and sorting

Which keywords describe research at KDDI Research (Japan)?

By fractional works in 2022-now, weighted toward what it does more of than the world: Deep Learning, Energy Efficiency, Massive MIMO, Channel Modeling, Wireless Networks, 5G, Optical Fiber and MIMO Systems.

▲ 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 Learning74▲ 4.0×56 topics
  2. Energy Efficiency48▲ 9.6×10 topics
  3. Machine Learning39▲ 2.1×41 topics
  4. Neural Networks32▲ 3.8×26 topics
  5. Massive MIMO31▲ 70×3 topics
  6. Channel Modeling29▲ 45×4 topics
  7. Wireless Networks29▲ 36×9 topics
  8. 5G28▲ 89×3 topics
  9. Optical Fiber27▲ 47×2 topics
  10. MIMO Systems26▲ 61×3 topics
  11. Heterogeneous Networks26▲ 48×2 topics
  12. Beamforming25▲ 45×4 topics
  13. Microwave Photonics24▲ 53×2 topics
  14. Spectral Efficiency24▲ 69×2 topics
  15. Coherent Detection24▲ 105×1 topic
  16. Digital Signal Processing24▲ 92×1 topic
  17. Cellular Networks23▲ 89×1 topic
  18. Interference Alignment23▲ 89×1 topic
  19. Optical Access Networks21▲ 122×1 topic
  20. Photonic Signal Processing21▲ 122×1 topic
  21. Communications19▲ 111×1 topic
  22. Millimeter Wave19▲ 126×1 topic
  23. Security16▲ 4.3×15 topics
  24. 5G Networks14▲ 13×5 topics
  25. Wireless Communication14▲ 18×4 topics
  26. Integrated Circuits14▲ 17×3 topics
  27. Elastic Optical Networks13▲ 146×1 topic
  28. Optical Networks13▲ 146×1 topic
  29. Security Analysis11▲ 12×4 topics
  30. IoT Security11▲ 6.7×3 topics
  31. Convolutional Networks11▲ 15×3 topics
  32. Resource Allocation11▲ 11×8 topics
  33. Optical Modulators10▲ 14×3 topics
  34. Channel Estimation10▲ 21×4 topics
  35. Anomaly Detection10▲ 6.5×3 topics
  36. Silicon Photonics10▲ 18×2 topics
  37. Microcavities10▲ 17×1 topic
  38. Nanophotonic Waveguides10▲ 20×1 topic
  39. Unsupervised Learning10▲ 12×3 topics
  40. Semiconductor Lasers9▲ 25×2 topics

Which research topics does KDDI Research (Japan) publish most on?

By volume in 2022-now: Optical Network Technologies, Advanced MIMO Systems Optimization, Advanced Photonic Communication Systems and Millimeter-Wave Propagation and Modeling.

Optical Network Technologies: 24 fractional worksAdvanced MIMO Systems Optimization: 23 fractional worksAdvanced Photonic Commun…21Advanced Photonic Communication Systems: 21 fractional worksMillimeter-Wave Propagat…19Millimeter-Wave Propagation and Modeling: 19 fractional worksAdvanced Optical Network Technologies: 13 fractional worksPhotonic and Optical Devices: 10 fractional worksCryptography and Data Se…9Cryptography and Data Security: 9 fractional worksTelecommunications and Broadcasting Technologies: 8 fractional worksAdvanced Vision and Imaging: 7 fractional worksAdvanced Wireless Communication Technologies: 7 fractional works
Electrical and Electronic EngineeringArtificial IntelligenceMedia TechnologyComputer Vision and Pattern Recognition

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

  1. 1 Optical Network Technologies Electrical and Electronic Engineering 24 works
  2. 2 Advanced MIMO Systems Optimization Electrical and Electronic Engineering 23 works
  3. 3 Advanced Photonic Communication Systems Electrical and Electronic Engineering 21 works
  4. 4 Millimeter-Wave Propagation and Modeling Electrical and Electronic Engineering 19 works
  5. 5 Advanced Optical Network Technologies Electrical and Electronic Engineering 13 works
  6. 6 Photonic and Optical Devices Electrical and Electronic Engineering 10 works
  7. 7 Cryptography and Data Security Artificial Intelligence 9 works
  8. 8 Telecommunications and Broadcasting Technologies Media Technology 8 works
  9. 9 Advanced Vision and Imaging Computer Vision and Pattern Recognition 7 works
  10. 10 Advanced Wireless Communication Technologies Electrical and Electronic Engineering 7 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 available14.3%not open85.7%

World: 40% of research is openly available.

with international co-authors9.5%domestic only90.5%

World: 18% is written across borders.

How has KDDI Research (Japan)'s research output changed?

Output in 2022-2025 was 28% higher 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 KDDI Research (Japan) as a percentage of every work published that year, 0.0020% in 2024.

still counting0.0050%0.010%KDDI Research (Japan)0.0019% in 202519801990200020102020

Fractional works of KDDI Research (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 2025KDDI Research (Japan)4.0% in 2025200020102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 13.0% in 1992.

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KDDI Research (Japan) on Science Explorer

A card with KDDI Research (Japan)'s standing and the fields it leads in, for a post or a slide. A link to this page previews as the same card.

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