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Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
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Job Title |
Professor |
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Research Fields, Keywords |
Communication Science, Multimodal Interaction, Social Signal Processing |
OTSUKA Kazuhiro
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Education 【 display / non-display 】
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2005.4-2007.3
Nagoya University Doctor Course Completed
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1993.4-1995.3
Yokohama National University Electrical and Computer Engineering Master Course Completed
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1989.4-1993.3
Yokohama National University Division of Electrical and Computer Enginnering Graduated
Degree 【 display / non-display 】
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Doctor of Information Science - Nagoya University
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Master of Engineering - Yokohama National University
Campus Career 【 display / non-display 】
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2024.10
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
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2020.4-2024.9
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
External Career 【 display / non-display 】
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2012.10-2020.3
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2007.4-2012.9
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2003.4-2007.3
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2001.4-2003.3
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1999.12-2001.3
Academic Society Affiliations 【 display / non-display 】
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2022.4
The Japanese Society for Artificial Intelligence
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2005
IEEE(Institute of Electrical and Electronics Engineering)
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1996
電子情報通信学会
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1996
情報処理学会
Research Areas 【 display / non-display 】
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Informatics / Human interfaces and interactions
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Informatics / Intelligent informatics
Thesis for a degree 【 display / non-display 】
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時系列画像に基づく動的事象の推測に関する研究
大塚和弘
2007.3
Doctoral Thesis Single Work
Papers 【 display / non-display 】
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Mai Imamura, Ayane Tashiro, Shiro Kumano, Kazuhiro Otsuka
IEEE Transactions on Affective Computing 16 ( 2 ) 1056 - 1073 2024 [Reviewed]
DOI Web of Science CiNii Research Repository
Language：English Publishing type：Research paper (scientific journal) Publisher：Institute of Electrical and Electronics Engineers Single Work
A novel framework named the synergistic functional spectrum analysis (sFSA) is proposed to explore the multifunctional interplay among multimodal nonverbal behaviours in human conversations. This study aims to reveal how multimodal nonverbal behaviours cooperatively perform communicative functions in conversations. To capture the intrinsic nature of nonverbal expressions, functional multiplicity, and interpretational ambiguity, e.g., a single head nod could imply listening, agreeing, or both, a novel concept named the functional spectrum, which is defined as the distribution of perceptual intensities of multiple functions by multiple observers, is introduced in the sFSA. Based on this concept, this paper presents functional spectrum corpora, which target 44 facial expression and 32 head movement functions. Then, spectrum decomposition is conducted to reduce the multimodal functional spectrum to a synergetic functional spectrum in a lower dimension functional space that is spanned by functional basis vectors representing primary and distinctive functionalities across multiple modalities. To that end, we propose a semiorthogonal nonnegative matrix factorization (SO-NMF) method, which assumes the additivity of multiple functions and aims to balance the distinctiveness and expressiveness of the factorization. The results confirm that some primary functional bases can be identified, which can be interpreted as the listener’s backchannel, thinking, and affirmative response functions, and the speaker’s thinking and addressing functions, and their positive emotion functions. In addition, regression models based on convolutional neural networks (CNNs) are presented to estimate the synergistic functional spectrum from the head poses and facial action units measured from conversation data. The results of these analyses and experiments confirm the potential of the sFSA and may lead to future extensions.
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Tajima, M; Tamura, I; Sasaki, A; Otsuka, K
IEEE ACCESS 14 47538 - 47559 2026.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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SUZUKI Sora, OTSUKA Kazuhiro
JSAI Technical Report, SIG-SLUD 106 ( 0 ) 33 - 40 2026.2
Language：Japanese Publishing type：Research paper (research society, symposium materials, etc.) Publisher：The Japanese Society for Artificial Intelligence Joint Work
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Concept and Development of Nonverbal Functional Spectrum Analysis: How Can We Understand the Diverse Nonverbal Behaviors of Interlocutors?
OTSUKA Kazuhiro
JSAI Technical Report, SIG-SLUD 106 ( 0 ) 32 - 32 2026.2 [Invited]
Language：Japanese Publishing type：Research paper (research society, symposium materials, etc.) Publisher：The Japanese Society for Artificial Intelligence Single Work
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自閉スペクトラム症児の会話における顔表情と頭部運動の非言語機能の特徴分析
電子情報通信学会HCGシンポジウム2025
電子情報通信学会HCGシンポジウム2025 2025.12
Language：Japanese Publishing type：Research paper (research society, symposium materials, etc.) Single Work
Review Papers 【 display / non-display 】
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非言語情報が生み出すコミュニケーションのリアリティ
大塚和弘
NTT研究所発 触感コンテンツ専門誌ふるえ 8 ( 5 ) 2016.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Single Work
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Prediction of "Who Will Be Next Speaker and When" in Multi-Party Meetings
Ryo Ishii, Kazuhiro Otsuka, Shiro Kumano, Junji Yamato
NTT Technical Review 13 ( 7 ) 2015
Language：English Publishing type：Internal/External technical report, pre-print, etc. Joint Work
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The Future of Idobata Kaigi (“Congregation at the Well”): Realizing Natural Conversations with Distance Access
Kazuhiro Otsuka, Nobuhiro Furuyama, Mayumi Bono
NII Today 48 6 - 7 2014.1
Language：English Publishing type：Internal/External technical report, pre-print, etc. Joint Work
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遠隔地間でも自然な会話を実現する、未来の井戸端会議とは
大塚和弘，古山宣洋，坊農真弓
国立情報学研究所 NII Today 62 6 - 7 2013.12
Language：Japanese Publishing type：Internal/External technical report, pre-print, etc. Joint Work
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MM-Space: Recreating Multiparty Conversation Space by Using Dynamic Displays
Kazuhiro Otsuka
NTT Technical Review 10 ( 11 ) 2012.11
Language：English Publishing type：Internal/External technical report, pre-print, etc. Single Work
Awards 【 display / non-display 】
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2023.12 電子情報通信学会 HCGシンポジウム2023 複数モダリティの非言語情報に基づく対話者の視線機能の分析と認識
Individual or group name of awards：田代絢子、今村まい、熊野史朗、大塚和弘
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2022.1 電子情報通信学会 ヒューマンコミュニケーション基礎研究専門委員会 「対話中の非言語行動の機能スペクトラム解析に向けて〜頭部運動を対象とした機能コーパスと深層学習モデルの構築事例〜」
Individual or group name of awards：大塚和弘
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2021.12 電子情報通信学会 HCGシンポジウム2021 複数人対話における深層転移学習による頭部運動相互作用の機能認識
Individual or group name of awards：森 駿志, 大塚和弘
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情報処理学会論文誌ジャーナル特選論文賞
2021.1 情報処理学会 話者継続・交替時における対話行為と視線行動に基づく共感スキルの推定
Individual or group name of awards：石井 亮, 大塚和弘, 熊野史朗, 東中竜一郎, 青野裕司
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電子情報通信学会 HCGシンポジウム2018 特集テーマセッション賞
2018.12 電子情報通信学会
Individual or group name of awards：石井 亮，大塚和弘，熊野史朗，東中竜一郎，富田準二
Presentations 【 display / non-display 】
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対話中の頭部運動機能の解釈の曖昧性を推定する深層回帰モデルの検討
武田 一輝, 大塚 和弘
第21回情報科学技術フォーラム(FIT2022)
Event date： 2022.9
Language：Japanese Presentation type：Oral presentation (general)
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複数人対話における深層転移学習による頭部運動相互作用の機能認識
森 駿志, 大塚和弘
電子情報通信学会HCGシンポジウム2021 2021.12 電子情報通信学会
Event date： 2021.12
Language：Japanese Presentation type：Oral presentation (general)
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Shumepi Otsuchi, Yoko Ishii, Momoko Nakatani, Kazuhiro Otsuka
23rd ACM International Conference on Multimodal Interaction (ICMI2021) 2021.10 ACM
Event date： 2021.10
Language：English Presentation type：Poster presentation
Venue：Montreal, Canada Country：Canada
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Takashi Mori, Kazuhiro Otsuka
23rd ACM International Conference on Multimodal Interaction (ICMI2021) 2021.10 ACM
Event date： 2021.10
Language：English Presentation type：Poster presentation
Venue：Montreal, Canada Country：Canada
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Inflation-Deflation Networks for Recognizing Head-Movement Functions in Face-to-Face Conversations
Kazuki Takeda, Kazuhiro Otsuka
23rd ACM International Conference on Multimodal Interaction (ICMI2021) 2021.10 ACM
Event date： 2021.10
Language：English Presentation type：Poster presentation
Venue：Montreal, Canada Country：Canada
Charge of on-campus class subject 【 display / non-display 】
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2026 Practical System Design
Graduate school of Engineering Science
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2026 Advanced information system Ⅱ-F
Graduate school of Engineering Science
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2026 Advanced information system Ⅱ-S
Graduate school of Engineering Science
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2026 Advanced information system I-F
Graduate school of Engineering Science
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2026 Advanced information system I-S
Graduate school of Engineering Science
Committee Memberships 【 display / non-display 】
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情報処理学会 情報規格調査会
2018.7 - 2020.3 専門委員
Committee type：Academic society
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電子情報通信学会 ヴァーバル・ノンヴァーバル・コミュニケーション研究会
2016.4 - 2020.3 委員長
Committee type：Academic society
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電子情報通信学会 和文論文誌D編集委員会
2010.5 - 2014.6 編集委員
Committee type：Academic society
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電子情報通信学会 ヴァーバル・ノンヴァーバル・コミュニケーション研究会
2010.4 - 2016.3 副委員長（会計）
Committee type：Academic society
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電子情報通信学会 ヴァーバル・ノンヴァーバル・コミュニケーション研究会
2008.4 専門委員，運営委員
Committee type：Academic society