Open Source Summit: Tokyo, Japan
Open Source Summit Japan returns on December 8–10, 2025, bringing together the developers, maintainers, community leaders, and industry voices who are shaping the future of open source. As the premier gathering for open source practitioners in the region, OSS Japan offers three days of technical depth, strategic insight, and cross-community collaboration all taking place at the Toranomon Hills Forum in the heart of Tokyo.
Why Attend?
- Connect with the people shaping open source
- Learn from maintainers, developers, community leaders, architects, and industry leaders.
- Discover emerging technologies and practical solutions you can use right away. Discover new technologies and real-world solutions
- Collaborate on ideas and code that move projects forward
- Grow your skills, your network, and your career
With tracks spanning Automotive Linux, Cloud & Containers, Linux, OSPOCon, Safety-Critical Software, Open Source Leadership, Operations Management, Zephyr and more, OSS Japan brings together a uniquely diverse mix of technologies, communities, and perspectives.
And this year, we are excited to highlight a major addition: the Zephyr track.
Zephyr Track Highlights:
Monday, December 8
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Running CFS on Zephyr: A Modern RTOS for Space Missions – Yasushi Shoji & Takuya Sasaki, Space Cubics Inc – Monday December 8, 2025 11:15 – 11:55 JST
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Applying Zephyr RTOS in Spacecraft Development – Takayuki Goto, Space Entry Co., Ltd. – Monday December 8, 2025 12:05 – 12:45 JST
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Zephyr: A Game Changer for the Automotive Industry – Yuichi Kusakabe, Honda Motor Co., Ltd. – Monday December 8, 2025 14:00 – 14:40 JST
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Lightning Talk: Debugging Edge AI on Zephyr and Lessons Learned – Tomohiro Kaneko, Brother Industries, Ltd. – Monday December 8, 2025 14:50 – 15:00 JST
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TinyML at the Edge: Deploying and Optimizing AI Workloads on Zephyr RTOS – Amandeep Singh, Welzin – Monday December 8, 2025 15:40 – 16:20 JST
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Challenging Hardware Contests With Zephyr and Lessons Learned – Tomohiro Kaneko, Brother Industries, Ltd. – Monday December 8, 2025 16:40 – 17:20 JST
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Bof: Zephyr Community in Japan: From Hobbyist To Automotive, Robotics, and Space Development – Hideki Takase, The University of Tokyo & Yasushi Shoji, Space Cubics – Monday December 8, 2025 17:30 – 18:10 JST
Tuesday, December 9
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Zephyr: Learnings From Working on Safety Certification in the Open – Kate Stewart, The Linux Foundation – Tuesday December 9, 2025 11:10 – 11:50 JST
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Zephyr‑Based VIRTIO Backend on Xen: Toward Open Source Functional Safety – Hiroshi Tokita – Tuesday December 9, 2025 12:00 – 12:40 JST
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Introducing a Heterogeneous Core Platform With AI Accelerator for Zephyr Development – Yuya Hamamachi, Renesas Electronics Corporation – Tuesday December 9, 2025 14:00 – 14:40 JST
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Zephyr Porting Efforts in High Performance SoCs – Kunihiko Hayashi, Socionext Inc. – Tuesday December 9, 2025 14:50 – 15:30 JST
Zephyr Project Meetup: Toyosu, Tokyo, Japan
In addition to the Zephyr track, the Zephyr community is also hosting an in-person Zephyr Project Meetup on the evening of December 8 in Toyosu, Tokyo. Held at the Renesas Electronics Corporation Toyosu office, this special edition meetup welcomes anyone interested in open source, embedded systems programming, or software development. From 7:00 PM to 9:00 PM JST, attendees will hear presentations on products running Zephyr, explore lesser-known subsystems and emerging features across the ecosystem. Space is limited, so register soon. Travel will be coordinated from the OSS Japan venue, with participants gathering near Hall B3 after the conference closing. Learn more about the event and register here.
Experience Tokyo
Tokyo is a bustling and vibrant city, with a population of over 13 million people. The city is known for its innovative spirit, cutting-edge technology, and unique fashion and design trends.
Did you know that Tokyo has the most Michelin-starred restaurants of any city in the world? As of 2024, Tokyo had 196 Michelin-starred restaurants! The food scene is legendary, with a wide range of culinary options available, from traditional Japanese cuisine to international fare.
Tokyo is a dynamic and exciting city that offers something for everyone. Whether you are interested in history and culture, technology and innovation, or shopping and dining, the city is sure to captivate and inspire you.
Join Us in Tokyo
Open Source Summit Japan is an opportunity to be part of the conversations and collaborations shaping the next decade of open technology. With the addition of the Zephyr track and the Zephyr Project Meetup, this year offers even more ways to learn, connect, and contribute. See you in Tokyo, Japan!