Konnichiwa from Tokyo! 🇯🇵
In June 2025, something remarkable happened: the global cloud native community gathered in Tokyo for the first-ever KubeCon + CloudNativeCon Japan, hosted by the Cloud Native Computing Foundation (CNCF) under the Linux Foundation. This wasn’t just another tech conference—it was a proud milestone for Japan’s growing open source and cloud native ecosystem.
🌏 A Landmark Gathering: KubeCon + CloudNativeCon Comes to Japan
KubeCon + CloudNativeCon Japan 2025 marked the first time the CNCF’s flagship event was held on Japanese soil—bringing together a full house of 1,500 attendees from across Japan and around the world. Hosted at the Hilton Tokyo Odaiba, the event featured over 40 sessions covering the full spectrum of cloud native technologies, ranging from beginner-friendly topics and observability to AI/ML, platform engineering, connectivity, and security.
The two days were packed with innovation, collaboration, and connection. Developers, maintainers, end users, and technologists of all stripes came together to share lessons learned, explore emerging trends, and dive deep into the future of open source infrastructure.
In addition to technical talks, the conference emphasized community building—celebrating contributors, spotlighting regional efforts, and encouraging diverse perspectives. For many Japanese attendees, it was a rare opportunity to engage with the global cloud native ecosystem right at home. For international guests, it was a chance to experience Japan’s fast-growing tech culture firsthand.
🇯🇵 CNCJ and Japan Community Day
While CNCF and the Linux Foundation brought usual professionalism to organizing KubeCon + CloudNativeCon Japan, we at Cloud Native Community Japan (CNCJ) were proud to support the local community layer—bridging global expertise with Japanese voices and initiatives.One of our most successful contributions was organizing Japan Community Day, held on June 15, just ahead of the main conference. This CNCJ-led event gathered local contributors, meetup organizers, and engineers from across Japan and from overseas. It was a relaxed, community-driven gathering where we shared ideas, highlighted CNCF projects with strong Japanese contributions—such as Keycloak and containerd—and reflected on the remarkable progress of Japan’s cloud-native ecosystem.