---
title: "NTT (Japan): research papers, co-authors and journals"
description: "From 2017 to 2026 (so far), authors at NTT (Japan) took part in 77 papers in the tracked journals, most of them in AI (56), information systems (10) and health economics and policy (5). 7 of them were published in 2025, against 8 in 2017."
url: https://scholar4ai.com/companies/ntt-japan
markdown_url: https://scholar4ai.com/companies/ntt-japan.md
license: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/)
share_text: "From 2017 to 2026 (so far), authors at NTT (Japan) took part in 77 papers in the tracked journals, most of them in AI (56), information systems (10) and health economics and policy (5). 7 of them were published in 2025… (as of 2026-11-05)"
data_url: https://scholar4ai.com/data/rankings.json
updated: 2026-11-05T06:02:37+09:00
window: 2026-10-07 to 2026-11-05
source: OpenAlex (CC0)
---

# NTT (Japan)

[Browse company research profiles](https://scholar4ai.com/companies/directory/page/2.md)

Papers in the tracked journals with an author at NTT (Japan): per year and category, where they are published, the institutions its researchers write with, and its most-cited papers. A paper counts as corporate when at least one of its authors is affiliated with an institution that OpenAlex classifies as a company; it counts once for each company among its authors' affiliations. Universities are the institutions OpenAlex classifies as education.

Back to the ranking: https://scholar4ai.com/rankings/companies.md

## Key findings

- From 2017 to 2026 (so far), authors at NTT (Japan) took part in 77 papers in the tracked journals, most of them in AI (56), information systems (10) and health economics and policy (5).
- 7 of them were published in 2025, against 8 in 2017.
- Since 2023, the institutions with the most of these papers were Kyoto University (3), Kyushu University (2) and Okayama University (2).
- The journals publishing most of them were Computers in Human Behavior (4), Machine Learning (4) and Neural Networks (3).
- The most-cited of them is “ASVspoof 2019: A large-scale public database of synthesized, converted and replayed speech” (Computer Speech & Language, 2020), with 505 citations.
- Since 2023, papers in the tracked journals cited 29 of its papers 92 times; 97% of those links came from papers with a university author and 2% from its own papers.
- Its own papers since 2023 cite archived papers 44 times, 14% of them papers with a company author.
- Across everything OpenAlex indexes, NTT (Japan) has 55,507 works with 2,591,466 citations (h-index 409).
- The tracked journals hold 71 of its 11,093 works in OpenAlex from 2017 to 2025 (0.6%).
- Its main research topics in OpenAlex are Optical Network Technologies (7,000), Semiconductor Lasers and Optical Devices (6,110) and Advanced Photonic Communication Systems (5,596).

## Papers per year

*Papers per publication year and category*

| Category | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 (so far) |
|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|---:|
| [AI](https://scholar4ai.com/categories/ai.md) | 4 | 4 | 2 | 15 | 10 | 6 | 4 | 1 | 5 | 5 |
| [Information Systems](https://scholar4ai.com/categories/information-systems.md) | 1 | 1 | 1 | 0 | 0 | 0 | 2 | 2 | 2 | 1 |
| [Health Economics and Policy](https://scholar4ai.com/categories/health-economics-and-policy.md) | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 |
| [Economics](https://scholar4ai.com/categories/economics.md) | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| [Operations Research](https://scholar4ai.com/categories/operations-research.md) | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| [Statistics](https://scholar4ai.com/categories/statistics.md) | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| All categories | 8 | 6 | 4 | 16 | 12 | 6 | 7 | 5 | 7 | 6 |

## Where the papers come from

*Journals with the most papers, since 2023*

| # | Journal | Papers |
|---:|---|---:|
| 1 | [Computers in Human Behavior](https://scholar4ai.com/journals/computers-in-human-behavior.md) | 4 |
| 2 | [Machine Learning](https://scholar4ai.com/journals/machine-learning.md) | 4 |
| 3 | [Neural Networks](https://scholar4ai.com/journals/neural-networks.md) | 3 |
| 4 | [Computers & Security](https://scholar4ai.com/journals/computers-security.md) | 2 |
| 5 | [Speech Communication](https://scholar4ai.com/journals/speech-communication.md) | 2 |
| 6 | [Computer Speech & Language](https://scholar4ai.com/journals/computer-speech-language.md) | 2 |
| 7 | [IEEE Transactions on Knowledge and Data Engineering](https://scholar4ai.com/journals/ieee-transactions-on-knowledge-and-data-engineering.md) | 2 |
| 8 | [Pattern Recognition](https://scholar4ai.com/journals/pattern-recognition.md) | 1 |
| 9 | [Social Science & Medicine](https://scholar4ai.com/journals/social-science-medicine.md) | 1 |
| 10 | [World Wide Web](https://scholar4ai.com/journals/world-wide-web.md) | 1 |

*Institutions with the most papers, since 2023*

| # | Institution | Papers |
|---:|---|---:|
| 1 | Kyoto University | 3 |
| 2 | Kyushu University | 2 |
| 3 | Okayama University | 2 |
| 4 | [The University of Tokyo](https://scholar4ai.com/institutions/the-university-of-tokyo.md) | 2 |
| 5 | University of Human Environments | 2 |
| 6 | Anan National College of Technology | 1 |
| 7 | [Arizona State University](https://scholar4ai.com/institutions/arizona-state-university.md) | 1 |
| 8 | Bar-Ilan University | 1 |
| 9 | [Centre National de la Recherche Scientifique](https://scholar4ai.com/institutions/centre-national-de-la-recherche-scientifique.md) | 1 |

*Countries with the most papers, since 2023*

| # | Country | Papers |
|---:|---|---:|
| 1 | Japan | 25 |
| 2 | United States | 3 |
| 3 | Germany | 2 |
| 4 | Australia | 1 |
| 5 | Belgium | 1 |
| 6 | Canada | 1 |
| 7 | Estonia | 1 |
| 8 | France | 1 |
| 9 | Hong Kong | 1 |
| 10 | Israel | 1 |

*Keywords with the most papers, since 2023*

| # | Keyword | Papers |
|---:|---|---:|
| 1 | esports | 4 |
| 2 | [domain adaptation](https://scholar4ai.com/keywords/domain-adaptation.md) | 3 |
| 3 | WavLM | 2 |
| 4 | speaker diarization | 2 |
| 5 | vector clustering | 2 |
| 6 | EEG | 1 |
| 7 | Fukushima Daiichi nuclear accident | 1 |
| 8 | Internet of Things security | 1 |
| 9 | Japanese speakers | 1 |
| 10 | LSTM decoder | 1 |

## Most-cited papers

*Most-cited papers since 2017*

| # | Citations | Per month | Title | Journal | Published | Authors |
|---:|---:|---:|---|---|---|---|
| 1 | 505 | 6.5 | [ASVspoof 2019: A large-scale public database of synthesized, converted and replayed speech](https://doi.org/10.1016/j.csl.2020.101114) | [Computer Speech & Language](https://scholar4ai.com/journals/computer-speech-language.md) | 2020-05-20 | Xin Wang, Junichi Yamagishi, Massimiliano Todisco et al. |
| 2 | 91 | 1.5 | [World model learning and inference](https://doi.org/10.1016/j.neunet.2021.09.011) | [Neural Networks](https://scholar4ai.com/journals/neural-networks.md) | 2021-09-20 | Karl John Friston, Rosalyn Moran, Yukie Nagai et al. |
| 3 | 48 | 0.4 | [On maximizing a monotone k -submodular function subject to a matroid constraint](https://doi.org/10.1016/j.disopt.2017.01.003) | [Discrete Optimization](https://scholar4ai.com/journals/discrete-optimization.md) | 2017-01-31 | Shinsaku Sakaue |
| 4 | 47 | 0.4 | [Modular representation of layered neural networks](https://doi.org/10.1016/j.neunet.2017.09.017) | [Neural Networks](https://scholar4ai.com/journals/neural-networks.md) | 2017-10-13 | Chihiro Watanabe, Kaoru Hiramatsu, Kunio Kashino |
| 5 | 43 | 0.4 | [Overview of the sixth dialog system technology challenge: DSTC6](https://doi.org/10.1016/j.csl.2018.09.004) | [Computer Speech & Language](https://scholar4ai.com/journals/computer-speech-language.md) | 2018-09-10 | Chiori Hori, Julien Pérez, Ryuichiro Higashinaka et al. |
| 6 | 42 | 0.6 | [MSLPNet: multi-scale location perception network for dental panoramic X-ray image segmentation](https://doi.org/10.1007/s00521-021-05790-5) | [Neural Computing and Applications](https://scholar4ai.com/journals/neural-computing-and-applications.md) | 2021-02-27 | Qiao Yi Chen, Yue Zhao, Yang Liu et al. |
| 7 | 35 | 0.6 | [Neural Schrödinger Equation: Physical Law as Deep Neural Network](https://doi.org/10.1109/tnnls.2021.3120472) | [IEEE Transactions on Neural Networks and Learning Systems](https://scholar4ai.com/journals/ieee-transactions-on-neural-networks-and-learning-systems.md) | 2021-11-03 | Mitsumasa Nakajima, Kenji Tanaka, Toshikazu Hashimoto |
| 8 | 32 | 0.5 | [Parallel and hierarchical neural mechanisms for adaptive and predictive behavioral control](https://doi.org/10.1016/j.neunet.2021.09.009) | [Neural Networks](https://scholar4ai.com/journals/neural-networks.md) | 2021-09-17 | Tom Macpherson, Masayuki Matsumoto, Hiroaki Gomi et al. |
| 9 | 27 | 0.5 | [Gaussian Process Regression With Interpretable Sample-Wise Feature Weights](https://doi.org/10.1109/tnnls.2021.3131234) | [IEEE Transactions on Neural Networks and Learning Systems](https://scholar4ai.com/journals/ieee-transactions-on-neural-networks-and-learning-systems.md) | 2021-12-10 | Yuya Yoshikawa, Tomoharu Iwata |
| 10 | 23 | 0.7 | [Cognitive decline with pupil constriction independent of subjective fatigue during prolonged esports across player expertise levels](https://doi.org/10.1016/j.chb.2024.108219) | [Computers in Human Behavior](https://scholar4ai.com/journals/computers-in-human-behavior.md) | 2024-03-26 | Takashi Matsui, Shion Takahashi, Genta Ochi et al. |

## Who cites its research

*Institutions whose papers cite it most, since 2023*

| # | Institution | Kind | Country | Links |
|---:|---|---|---|---:|
| 1 | [Chinese Academy of Sciences](https://scholar4ai.com/institutions/chinese-academy-of-sciences.md) | Government | China | 8 |
| 2 | [University of Technology Sydney](https://scholar4ai.com/institutions/university-of-technology-sydney.md) | University | Australia | 5 |
| 3 | [Shandong Normal University](https://scholar4ai.com/institutions/shandong-normal-university.md) | University | China | 5 |
| 4 | [Ocean University of China](https://scholar4ai.com/institutions/ocean-university-of-china.md) | University | China | 4 |
| 5 | [University of Salerno](https://scholar4ai.com/institutions/university-of-salerno.md) | University | Italy | 3 |
| 6 | [Beijing University of Posts and Telecommunications](https://scholar4ai.com/institutions/beijing-university-of-posts-and-telecommunications.md) | University | China | 3 |
| 7 | National Institute of Informatics | Research facility | Japan | 3 |
| 8 | [Nantong University](https://scholar4ai.com/institutions/nantong-university.md) | University | China | 3 |
| 9 | Kyoto University | University | Japan | 3 |
| 10 | [Wuhan University](https://scholar4ai.com/institutions/wuhan-university.md) | University | China | 3 |

## What its papers cite

*Institutions its papers cite most, since 2023*

| # | Institution | Kind | Country | Links |
|---:|---|---|---|---:|
| 1 | [The University of Melbourne](https://scholar4ai.com/institutions/the-university-of-melbourne.md) | University | Australia | 3 |
| 2 | [National University of Singapore](https://scholar4ai.com/institutions/national-university-of-singapore.md) | University | Singapore | 3 |
| 3 | [Chinese Academy of Sciences](https://scholar4ai.com/institutions/chinese-academy-of-sciences.md) | Government | China | 3 |
| 4 | [Institute of Automation](https://scholar4ai.com/institutions/institute-of-automation.md) | Research facility | China | 3 |
| 5 | RIKEN Center for Advanced Intelligence Project | Research facility | Japan | 3 |
| 6 | [University of Chinese Academy of Sciences](https://scholar4ai.com/institutions/university-of-chinese-academy-of-sciences.md) | University | China | 3 |
| 7 | [Leiden University](https://scholar4ai.com/institutions/leiden-university.md) | University | Netherlands | 2 |
| 8 | Ewha Womans University | University | South Korea | 2 |
| 9 | [Queensland University of Technology](https://scholar4ai.com/institutions/queensland-university-of-technology.md) | University | Australia | 2 |
| 10 | [Shanghai Jiao Tong University](https://scholar4ai.com/institutions/shanghai-jiao-tong-university.md) | University | China | 2 |

More: https://scholar4ai.com/corporate-citations.md · https://scholar4ai.com/industry-university.md

## In OpenAlex

*NTT (Japan) in OpenAlex*

| Item | Value |
|---|---|
| Type | Company |
| Location | Tokyo, Japan |
| Also known as | Nippon Telegraph and Telephone, 日本電信電話株式会社 |
| Units listed in OpenAlex | 3 |
| Works in OpenAlex | 55,507 |
| Citations | 2,591,466 |
| h-index | 409 |
| i10-index | 52,029 |
| 2-year mean citedness | 1.96 |
| Website | [www.ntt.co.jp/index_e.html](http://www.ntt.co.jp/index_e.html) |
| ROR | [ror.org/00berct97](https://ror.org/00berct97) |
| Wikidata | [www.wikidata.org/wiki/Q1054787](https://www.wikidata.org/wiki/Q1054787) |
| OpenAlex | [openalex.org/I2251713219](https://openalex.org/I2251713219) |

*Works and citations per year in OpenAlex, and its papers in the tracked journals*

| Year | Works in OpenAlex | Citations received | In the tracked journals | Share |
|---|---:|---:|---:|---:|
| 2026 (so far) | 1,021 | 23,667 | 6 | 0.6% |
| 2025 | 1,281 | 35,727 | 7 | 0.5% |
| 2024 | 1,269 | 36,800 | 5 | 0.4% |
| 2023 | 1,235 | 36,492 | 7 | 0.6% |
| 2022 | 1,306 | 36,369 | 6 | 0.5% |
| 2021 | 1,230 | 38,508 | 12 | 1.0% |
| 2020 | 1,205 | 35,579 | 16 | 1.3% |
| 2019 | 1,204 | 33,728 | 4 | 0.3% |
| 2018 | 1,191 | 32,050 | 6 | 0.5% |
| 2017 | 1,172 | 31,033 | 8 | 0.7% |

*Main research topics (OpenAlex, all works)*

| # | Topic | Field | Works |
|---:|---|---|---:|
| 1 | Optical Network Technologies | Engineering | 7,000 |
| 2 | Semiconductor Lasers and Optical Devices | Engineering | 6,110 |
| 3 | Advanced Photonic Communication Systems | Engineering | 5,596 |
| 4 | Photonic and Optical Devices | Engineering | 4,586 |
| 5 | Semiconductor Quantum Structures and Devices | Physics and Astronomy | 3,185 |

From OpenAlex's own record of the institution (CC0), read again monthly. Works and citations count everything OpenAlex indexes, not only the tracked journals; topics are OpenAlex's classification of those works.

## Cite this page

Scholar4AI. (2026). NTT (Japan). Journal and Conference Research Rankings. Retrieved November 5, 2026, from https://scholar4ai.com/companies/ntt-japan

```bibtex
@misc{scholar4ai-companies-ntt-japan,
  author = {{Scholar4AI}},
  title = {NTT (Japan)},
  year = {2026},
  howpublished = {\url{https://scholar4ai.com/companies/ntt-japan}},
  urldate = {2026-11-05},
  note = {Journal and Conference Research Rankings; data from OpenAlex (CC0); licensed CC BY-NC 4.0}
}
```

License: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/).