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RIKEN Information R&D and Strategy Headquarters Knowledge Acquisition and Dialogue Research Team

Team Leader: Koichiro Yoshino (Ph.D.)

Research Summary

Koichiro Yoshino (Ph.D.)

Communication through language is an essential tool for robots to cooperate with users in daily lives. This research team focuses on modeling intention estimation, thinking, and inference on verbal and non-verbal communications. We are working on the following topics:

  • 1.action management of dialogue robots
  • 2.spoken dialogue related technologies
  • 3.modeling thinking, inference, and topic selection of robots
  • 4.knowledge expressions grounded on robot behaviors and dialogue contents
  • 5.incorporating emotion and language information
  • 6.empathy, emotion, and trust in dialogue

Main Research Fields

  • Complex Systems

Related Research Fields

  • Engineering
  • Psychology & Psychiatry
  • Informatics
  • Interdisciplinary Science & Engineering
  • Mathematical & Physical Sciences
  • Biological Sciences
  • Biology
  • Medicine, Dentistry & Pharmacy
  • Human informatics – Intelligent informatics
  • Human informatics – Perceptual information processing
  • Human informatics – Intelligent robotics


  • Spoken dialogue system
  • Natural language processing
  • Multimodal information processing
  • Natural language understanding
  • Natural language generation

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. Tung The Nguyen, Koichiro Yoshino, Sakriani Sakti and Satoshi Nakamura.:
    "Policy Reuse for Dialog Management Using Action-Relation Probability"
    IEEE Access, Vol.8, pp.159639-159649, 2020
  • 2. *Luis Fernando D'Haro, Koichiro Yoshino, Chiori Hori, Tim K. Marks, Lazaros Polymenakos, Jonathan K. Kummerfeld, Michel Galley, and Xiang Gao.:
    "Overview of the seventh Dialog System Technology Challenge: DSTC7"
    Computer Speech & Language, Volume 62, 2020
  • 3. Seitaro Shinagawa, Koichiro Yoshino, Seyed Hossein Alavi, Kallirroi Georgila, David Traum, Sakriani Sakti, and Satoshi Nakamura.:
    "An Interactive Image Editing System using an Uncertainty-based Confirmation Strategy"
    IEEE Access, Vol.8, pp.98471 - 98480, 2020
  • 4. The Tung Nguyen, Koichiro Yoshino, Sakriani Sakti, Satoshi Nakamura.:
    "Dialog Management of Healthcare Consulting System by Utilizing Deceptive Information"
    Transactions of the Japanese Society for Artificial Intelligence, Vol.35, No.1, pp.DSI-C_1-12, 2020
  • 5. *Nurul Lubis, Sakti Sakriani, Koichiro Yoshino, Satoshi Nakamura.:
    "Positive Emotion Elicitation in Chat-based Dialogue Systems"
    IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP), Vol.27, Issue.4, pp.866--877, April 2019
  • 6. Koichiro Yoshino, Kana Ikeuchi, Katsuhito Sudoh, Satoshi Nakamura.:
    "Improving Spoken Language Understanding by Wisdom of Crowds"
    In Proceedings of The 28th International Conference on Computational Linguistics (COLING2020), Barcelona (virtual), Spain, December 2020 (accepted).
  • 7. Koichiro Yoshino, Kohei Wakimoto, Yuta Nishimura and Satoshi Nakamura.:
    "Caption Generation of Robot Behaviors based on Unsupervised Learning of Action Segments"
    In Proceedings of International Workshop on Spoken Dialogue Systems Technology (IWSDS) 2020, Madrid (virtual), Spain, Sep. 2020.
  • 8. *Seiya Kawano, Koichiro Yoshino, Satoshi Nakamura.:
    "Neural Conversation Model Controllable by Given Dialogue Act Based on Adversarial Learning and Label-aware Objective"
    The 12th International Conference on Natural Language Generation (INLG2019), Tokyo, Japan, October 2019.
  • 9. *Shohei Tanaka, Koichiro Yoshino, Katsuhito Sudoh, Satoshi Nakamura.:
    "Conversational Response Re-ranking Based on Event Causality and Role Factored Tensor Event Embedding"
    The 1st workshop on NLP for ConvAI workshop in ACL conference, Florence, Italy, July 2019

Lab Members

Principal investigator

Koichiro Yoshino
Team Leader

Core members

Canasai Kruengkrai
Research Scientist
Seiya Kawano
Research Scientist
Angel Fernando Garcia Contreras
Postdoctoral Researcher
Hideko Habe
Technical Staff I
Shun Inazumi
Junior Research Associate
Kazuyo Onishi
Junior Research Associate

Contact Information

3rd Floor, Advanced Telecommunications Research Institute International
2-2-2 Hikaridai Seika-cho, Sorakugun, Kyoto
619-0288 Japan (Kansai Science City)
Email: koichiro.yoshino [at] riken.jp