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Esaki-Ochiai Lab
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The lab builds the next-generation Internet from the ground up and operates it.
AboutAbout the lab
Building and running the next-generation Internet.
The Esaki-Ochiai Lab is a networking lab at the University of Tokyo.
The lab conducts broad research, from network architecture and backbones to sensors and mobile, and on to smart city practice and security that make use of them.
The lab studies both the foundational and applied technologies of the next-generation Internet, aiming to produce practical technologies by actually developing and operating them.
The lab contributes to many projects, including the WIDE Project, and also takes part in operating the networks for events such as Interop Tokyo and IETF meetings.
Key terms
- Smart city
- Urban development that collects data about a city through sensors and communications and uses it to improve daily life and city operations
- Federated learning
- A method of building a model without gathering data in one place: each device trains on its own data, and only the results are brought together
- Building automation
- A system that connects a building's equipment to a network and operates it automatically
ResearchResearch themes
The lab conducts broad research, from network architecture and backbones to sensors and mobile, smart city practice, and security. It studies both the foundational and applied technologies of the next-generation Internet, and produces practical technologies by actually developing and operating them.
*Illustrative imageDistributed AI
The lab studies federated learning, as well as decentralized federated learning that has no central server. It also works on multimodal machine learning, which handles multiple types of data together.
*Illustrative imageCybersecurity
The lab studies mechanisms that protect networks and the information flowing through them. This theme is pursued together with smart city practice that makes use of sensors and mobile devices.
*Illustrative imageNext-Generation Internet Applications
The lab studies new applications that run on the next-generation Internet. It takes part in experimental networks that projects such as WIDE build and operate themselves, and verifies what it has built by actually running it.
*Illustrative imageBuilding Automation
The lab works on building automation, which connects building facilities over a network. In the Green UTokyo Engineering Project, which uses Engineering Building No. 2 as a testbed, it is advancing the measurement of various kinds of data and the establishment of control and operation technologies based on that data.
MembersFaculty
The members of the Esaki-Ochiai Lab include faculty, project researchers, postdoctoral researchers, secretaries, and doctoral, master's, and undergraduate students.As of 2025
- ProfessorHiroshi EsakiPublications ↗
- Associate ProfessorHideya OchiaiPublications ↗
- Associate ProfessorManabu TsukadaPublications ↗
- Assistant ProfessorKazuhiro Katoh
- Project Assistant ProfessorEhsan JavanmardiPublications ↗
- Project Assistant ProfessorNaren BaoPublications ↗
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
On a 4-point scale, ● marks where students' answers fall
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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: “Ethernet Patch Panel” Kbh3rd / CC BY 4.0 (cropped)
- Distributed AI: “Fully decentralized federated learning” MarcT0K / CC BY 4.0 (cropped)
- Cybersecurity: “Gateway firewall” Harald Mühlböck / CC BY-SA 3.0 (cropped)
- Next-Generation Internet Applications: “NetTransformer Internet BGP map” Niau33 / CC BY-SA 4.0 (cropped)
- Building Automation: “HVAC Air Handler Unit, pic1” Alf van Beem / CC0 (cropped)
- Related lab (Matsuura Lab): “BalticServers data center” BalticServers.com / CC BY-SA 3.0 (cropped)
- Related lab (Irie-Kadomoto Lab): “12-inch silicon wafer” Peellden / CC BY-SA 3.0 (cropped)
- Related lab (Hirose-Natsuaki Lab): “Radar image of the Danube Delta ESA223752” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Related lab (Kawahara Lab): “Printed flexible electronics ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
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