Science Explorer Interactive view Map
Company · Fujimino · Japan

KDDI Research (Japan)

In research, KDDI Research (Japan) stands highest in Computer Science (#991 of 4,667 worldwide), Physical Sciences (#5,974 of 12,888 worldwide) and Engineering (#3,289 of 6,636 worldwide), 2022–2025. 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 9.1× its share of world research.

kddi-research.jpROR OpenAlex
World rank, 2022–2025
#9,613
of 28,054 · #8,075 all time
Rank in Japan
#245
of 1,070
Research works
2.4k
▲ 54% vs 2013–17
Citations
20k
8.3 per fractional work
Top-10% rate
10.0%
record average 16.5%
Open access
14%
world 28%

What is KDDI Research (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
Computer ScienceField #991 of 4,667 12.2%185 #2145
Physical SciencesDomain #5,974 of 12,888 8.9%441 #5059
EngineeringField #3,289 of 6,636 6.8%235 #1840
Electrical and Electronic EngineeringSubfield #1,645 of 2,318 6.7%163 #829
Artificial IntelligenceSubfield #1,620 of 1,884 13.7%68 #2187

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 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. Computer Science#2,145 #991
  2. Physical Sciences#5,059 #5,974
  3. Engineering#1,840 #3,289
  4. Electrical and Electronic Engineering#829 #1,645
  5. Artificial Intelligence#2,187 #1,620
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 KDDI Research (Japan) specialise in?

Where its research is concentrated relative to its size: Electrical and Electronic Engineering takes 9.1× the share of its output that it takes of world research.

  1. Electrical and Electronic EngineeringSubfield · 163.1 works9.1×
  2. Computer Networks and CommunicationsSubfield · 32.5 works7.3×
  3. Artificial IntelligenceSubfield · 68.5 works5.7×
  4. Computer Vision and Pattern RecognitionSubfield · 30.5 works4.8×
  5. Computer ScienceField · 185.3 works4.8×
← 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: 0.07× its world share, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.11× its world share, 3 worksBiochemistry, Geneti…Neuroscience: 0.84× its world share, 7 worksNeuroscienceChemical Engineering: 0.06× its world share, 0 worksChemical EngineeringComputer Science: 4.76× its world share, 185 worksComputer ScienceEarth and Planetary Sciences: 0.70× its world share, 6 worksEarth and Planetary …Energy: 0.07× its world share, 0 worksEnergyEngineering: 3.13× its world share, 236 worksEngineeringEnvironmental Science: 0.13× its world share, 3 worksEnvironmental ScienceMaterials Science: 0.10× its world share, 2 worksMaterials ScienceMathematics: 0.05× its world share, 0 worksMathematicsPhysics and Astronomy: 0.81× its world share, 9 worksPhysics and AstronomyHealth Professions: 0.09× its world share, 1 worksHealth ProfessionsMedicine: 0.05× its world share, 5 worksMedicineNursing: 0.06× its world share, 0 worksNursingVeterinary: 0.24× its world share, 0 worksVeterinaryArts and Humanities: 0.25× its world share, 4 worksArts and HumanitiesBusiness, Management and Accounting: 0.29× its world share, 5 worksBusiness, Management…Decision Sciences: 0.80× its world share, 4 worksDecision SciencesEconomics, Econometrics and Finance: 0.13× its world share, 1 worksEconomics, Econometr…Psychology: 0.61× its world share, 9 worksPsychologySocial Sciences: 0.30× its world share, 19 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Computer Science, 4.8×. Every wedge is a field page.

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

Ranked on the composite score, Hidenori Takahashi, N. Edagawa and Yukio Horiuchi lead among researchers whose main affiliation is KDDI Research (Japan).

  1. 1 Hidenori Takahashi Japan · #165,306 worldwide 183 citations · 53 works
  2. 2 N. Edagawa Japan · #173,340 worldwide 151 citations · 45 works
  3. 3 Yukio Horiuchi Japan · #191,097 worldwide 188 citations · 66 works
  4. 4 Itsuro Morita Japan · #204,553 worldwide 309 citations · 112 works
  5. 5 S. Akiba Japan · #208,392 worldwide 125 citations · 49 works
  6. 6 Teruyuki Hasegawa Japan · #235,715 worldwide 127 citations · 33 works
  7. 7 A. Agata Japan · #242,287 worldwide 58 citations · 26 works
  8. 8 Shigeyuki Sakazawa Japan · #243,518 worldwide 186 citations · 54 works
  9. 9 Abdelmoula Bekkali Japan · #317,368 worldwide 61 citations · 23 works
  10. 10 Shohei Beppu Japan · #347,938 worldwide 75 citations · 27 works
All ranked researchers at KDDI Research (Japan)

Which keywords describe research at KDDI Research (Japan)?

By fractional works in 2022–2025, 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 2022–2025 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 Learning66▲ 3.9×53 topics
  2. Energy Efficiency44▲ 9.4×9 topics
  3. Machine Learning36▲ 2.2×38 topics
  4. Neural Networks31▲ 4.0×26 topics
  5. Massive MIMO28▲ 69×2 topics
  6. Channel Modeling28▲ 44×4 topics
  7. Wireless Networks26▲ 34×8 topics
  8. 5G26▲ 91×3 topics
  9. Optical Fiber26▲ 48×2 topics
  10. Heterogeneous Networks24▲ 50×2 topics
  11. MIMO Systems24▲ 61×3 topics
  12. Microwave Photonics24▲ 53×2 topics
  13. Coherent Detection23▲ 107×1 topic
  14. Digital Signal Processing23▲ 95×1 topic
  15. Beamforming22▲ 42×4 topics
  16. Spectral Efficiency22▲ 66×2 topics
  17. Optical Access Networks21▲ 126×1 topic
  18. Photonic Signal Processing21▲ 126×1 topic
  19. Cellular Networks20▲ 83×1 topic
  20. Interference Alignment20▲ 83×1 topic
  21. Communications18▲ 109×1 topic
  22. Millimeter Wave18▲ 122×1 topic
  23. Integrated Circuits13▲ 17×3 topics
  24. Security13▲ 4.1×14 topics
  25. Wireless Communication13▲ 17×4 topics
  26. Elastic Optical Networks12▲ 153×1 topic
  27. Optical Networks12▲ 153×1 topic
  28. 5G Networks12▲ 12×5 topics
  29. Convolutional Networks10▲ 15×3 topics
  30. Optical Modulators10▲ 14×3 topics
  31. Security Analysis10▲ 12×4 topics
  32. IoT Security10▲ 6.2×3 topics
  33. Silicon Photonics10▲ 18×2 topics
  34. Resource Allocation10▲ 11×8 topics
  35. Microcavities10▲ 17×1 topic
  36. Nanophotonic Waveguides10▲ 19×1 topic
  37. Channel Estimation9▲ 21×3 topics
  38. Semiconductor Lasers9▲ 26×2 topics
  39. Homomorphic Encryption8▲ 37×1 topic
  40. Identity-Based Encryption8▲ 37×1 topic

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

By volume in 2022–2025: Optical Network Technologies, Advanced Photonic Communication Systems, Advanced MIMO Systems Optimization and Millimeter-Wave Propagation and Modeling.

Optical Network Technologies: 23 fractional worksAdvanced Photonic Communication Systems: 21 fractional worksAdvanced MIMO Systems Op…20Advanced MIMO Systems Optimization: 20 fractional worksMillimeter-Wave Propagat…18Millimeter-Wave Propagation and Modeling: 18 fractional worksAdvanced Optical Network Technologies: 12 fractional worksPhotonic and Optical Devices: 10 fractional worksCryptography and Data Se…8Cryptography and Data Security: 8 fractional worksTelecommunications and Broadcasting Technologies: 8 fractional worksAdvanced Vision and Imaging: 7 fractional worksSemiconductor Lasers and Optical Devices: 6 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 23 works
  2. 2 Advanced Photonic Communication Systems Electrical and Electronic Engineering 21 works
  3. 3 Advanced MIMO Systems Optimization Electrical and Electronic Engineering 20 works
  4. 4 Millimeter-Wave Propagation and Modeling Electrical and Electronic Engineering 18 works
  5. 5 Advanced Optical Network Technologies Electrical and Electronic Engineering 12 works
  6. 6 Photonic and Optical Devices Electrical and Electronic Engineering 10 works
  7. 7 Cryptography and Data Security Artificial Intelligence 8 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 Semiconductor Lasers and Optical Devices Electrical and Electronic Engineering 6 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: 28% of research is openly available.

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

World: 19% is written across borders.

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

Output in 2018–2022 was 54% 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.

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.