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Sakaguchi Lab
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A lab studying wireless networks beyond 5G/6G and digital twins.
AboutAbout the lab
Toward wireless networks beyond 5G/6G.
The Sakaguchi Lab (formerly the Araki-Sakaguchi Lab) studies wireless technologies, building on wireless communication systems.
Its work is wide-ranging, from theoretical analysis to hardware implementation, building measurement systems, and field trials.
Together with companies in Japan and abroad, it develops new wireless applications and takes part in setting standards for next-generation wireless systems.
The lab is run jointly with the Tan Lab.
Key terms
- Millimeter wave
- A high-frequency radio wave. It allows high-capacity communication but does not easily reach behind buildings and other obstacles
- MIMO
- A technology that transmits and receives radio waves simultaneously with multiple antennas to increase communication capacity and reliability
- Digital twin
- An exact replica of a real city or device, recreated inside a computer using data
- Low-Earth-orbit satellite
- An artificial satellite that orbits at a relatively low altitude above the ground. It can provide communication even in places without communication infrastructure
NewsLab news
View More ↗ResearchResearch themes
Building on wireless communication systems, the lab studies wireless networks beyond 5G/6G and new systems that use them. It works on millimeter-wave communication, digital twins, and smart agriculture and ocean applications using satellite communication.
*Illustrative imageSmart Agriculture and Ocean Applications Connected by Satellite
This research connects farmland and ocean areas without communication infrastructure through low-Earth-orbit satellite communication. The lab designed a driving system for an automatic tractor at a farm on the Yokohama Campus, and developed a model that estimates fish quantity from sonar data at sea.
*Illustrative imageSmart Systems Using Digital Twins
This research builds digital twins of cities from real-world data and applies them to transportation and communication. The lab works on autonomous car sharing, route selection for vehicle millimeter-wave communication, and digital signage on campus.
*Illustrative imageMillimeter-Wave MIMO Systems
The lab studies millimeter-wave MIMO systems for beyond 5G and 6G. It proposes methods that expand the coverage and capacity of communication through many relay stations, and transmission methods that can recover data even when some beams are blocked.
*Illustrative imageField Trials of Millimeter-Wave Repeaters for 5G/6G
Millimeter waves allow high-capacity communication but do not easily reach behind buildings and other obstacles. The lab places analog millimeter-wave repeaters in real locations and conducts field trials to expand the communication coverage.
MembersFaculty
The Sakaguchi Lab consists of faculty, professors emeritus, staff, doctoral, master's, and undergraduate students, research students, and visiting researchers.As of 2025
- ProfessorKei SakaguchiPublications ↗
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RelatedLabs similar to Sakaguchi Lab
Tran LabSchool of Engineering, Department of Electrical and Electronic EngineeringB5G/6G, non-terrestrial networks, signal processing
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Suzuki LabSchool of Engineering, Department of Electrical and Electronic EngineeringTerahertz sensing devices, compound semiconductorsThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “Cell tower antenna, Zagrebačka cesta” Mnalis / CC BY-SA 4.0 (cropped)
- Smart Agriculture and Ocean Applications Connected by Satellite: “Vitoria - Tractor 01” Basotxerri / CC BY-SA 4.0 (cropped)
- Smart Systems Using Digital Twins: “2019 City of London 3D model” AccuCities / CC BY-SA 4.0 (cropped)
- Millimeter-Wave MIMO Systems: “Microwave tower silhouette-2” Tony Wills / CC BY 2.5 (cropped)
- Field Trials of Millimeter-Wave Repeaters for 5G/6G: “Cell-Tower” J.smith（English Wikipedia） / CC BY-SA 2.5 (cropped)
- Related lab (タン研究室): “Constellation satellites in low Earth orbits (artist’s impression, not to scale) (noirlab2022a)” NOIRLab/NSF/AURA/P. Marenfeld / CC BY 4.0 (cropped)
- Related lab (白根研究室): “DARPA amplifier on silicon USC” University of Southern California and Columbia University / Public domain (cropped)
- Related lab (岡田研究室): “07R01” Mister rf / CC BY-SA 4.0 (cropped)
- Related lab (鈴木研究室): “Terahertz freq. metamaterial modulator” Hou-Tong Chen (Los Alamos National Laboratory) / Public domain (cropped)
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