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Ogawa Lab
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The lab takes a scientific approach to communication between humans and machines through speech and dialogue.
AboutAbout the lab
Putting human experience and intuition into words with data.
Ogawa Lab studies communication between humans and machines through speech and dialogue.
The lab combines a wide range of technologies, including speech recognition, pattern recognition, and natural language processing.
In recent years, it has also been studying technologies that express human experience and intuition in words based on data.
The lab also conducts research on keeping systems built with pattern recognition and machine learning usable over the long term.
Key terms
- Turn-taking
- The timing by which speakers and listeners naturally switch roles in a conversation
- Pattern recognition
- A technology that finds common features in data such as audio and images and identifies what the data represents
- Probabilistic model
- A mathematical model that expresses how likely things are to happen in numbers, and an approach commonly used in areas such as speech recognition
NewsLab news
An undergraduate student received the Student Poster Award at the IEICE Technical Committee on Speech
A doctoral student received the IPSJ Yamashita SIG Research Award from the Information Processing Society of Japan
A master's student received the Student Excellent Presentation Award from the Acoustical Society of Japan
A lecturer (Research Institute) received the Waseda University Research Award
A doctoral student received the Research Encouragement Award from the IEICE
ResearchResearch themes
The lab conducts broad research on communication between humans and machines through speech and language. It works on dialogue-related technologies such as conversational robots, speech recognition, and technologies that handle the meaning of language.
*Illustrative imageRobots That Can Converse Naturally
The lab develops conversational robots such as ROBISUKE, aiming to reproduce the pause timing (turn-taking) that occurs naturally in dialogue between people.
*Illustrative imageBuilding the Mechanisms of Dialogue
The lab studies the mechanisms of dialogue themselves, including understanding a speaker's intent, modeling turn-taking, and speech synthesis for conversation.
*Illustrative imageNoise-Robust Speech Recognition
Aiming for speech recognition that hears correctly even when the speaking environment or manner of speaking changes, the lab studies probabilistic models and search methods.
*Illustrative imageTechnologies for Handling the Meaning of Language
The lab studies technologies that handle the meaning of language, including how to represent the meaning of text, text classification and summarization using external knowledge, and question answering in dialogue.
MembersFaculty
The members of Ogawa Lab consist of faculty, researchers including visiting researchers, secretaries, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTetsuji Ogawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Spectrogram - It Rains a Lot in Portland” Aaron Parecki / CC BY 2.0 (cropped)
- Robots That Can Converse Naturally: “Quori socially interactive robot platform IMG” Mary Mark Ockerbloom / CC BY-SA 4.0 (cropped)
- Building the Mechanisms of Dialogue: “Up and down” Roberto Picco / CC BY 2.0 (cropped)
- Noise-Robust Speech Recognition: “Gold Pan” Nate Cull / CC BY 2.0 (cropped)
- Technologies for Handling the Meaning of Language: “Cuneiform Akkadian clay tablet 1” Original author unknown. Translation help provided by Manuel Molina. / Public domain (cropped)
- Related lab (Kobayashi Lab): “Spectrogram of Papuan Malay sentence de bicara keras” Emflazie / CC0 (cropped)
- Related lab (Maehara Lab): “Advanced Technology Demonstrator radar antenna array 01” NOAA / Public domain (cropped)
- Related lab (Kasai Lab): “Koch V3 85 Grad K HQ OpenCL” PantheraLeo1359531 / CC BY 4.0 (cropped)
- Related lab (Kawahara Lab): “Kanji (Unsplash)” Niketh Vellanki / CC0 (cropped)
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