Company to present digital platform modernization success at KubeCon + CloudNativeCon Japan 2025
TOKYO, June 15, 2025 -- The Cloud Native Computing Foundation® (CNCF®), which builds sustainable ecosystems for cloud native software, today announced Tokyo Gas as the winner of the CNCF End User Case Study Contest. Selected for its innovative use of Kubernetes, Argo CD, and Istio to modernize its largest digital membership platform, Tokyo Gas will share its cloud native journey at KubeCon + CloudNativeCon Japan 2025, 16–17 June in Tokyo.
CNCF announces Tokyo Gas as the winner of the CNCF End User Case Study Contest.
The myTOKYOGAS development team at Tokyo Gas embarked on a strategic refactoring effort to overcome the limitations of its lift-and-shift cloud migration. Initially constrained by monolithic architecture, rigid virtual machines, and slow release cycles, the team sought to enhance scalability, deployment speed, and operational efficiency. This transformation became critical following the phased and subsequent full deregulation of Japan's energy retail market – with the electric power retail market regulated in April 2016 and the gas retail market in April 2017 – which accelerated the need for business agility and stronger customer engagement.
"Modernizing a legacy system is never easy, but by embracing a cloud native architecture, we have a flexible foundation for long-term innovation in order to compete in a rapidly changing market," said Yusuke Sugiyama, software engineer, Tokyo Gas. "Kubernetes, Argo CD, and Istio allowed us to reduce costs, better engage with our customers, and streamline our operations. We are proud to share our progress at KubeCon + CloudNativeCon Japan and contribute to the open source community that helped make our success possible."
Tokyo Gas is one of Japan's leading energy providers, serving approximately 13 million customers. In leveraging cloud native technologies, it plays a critical role in reducing data center energy consumption and supporting the transition to a carbon-neutral future. CNCF looks forward to seeing Tokyo Gas use these technologies to advance towards its sustainability goals.
To address the challenges, Tokyo Gas adopted Kubernetes to enable dynamic scaling, Argo CD to implement GitOps practices, and Istio to support a microservices-based architecture. These open source solutions reduced operational burden and vendor lock-in, while enabling a more sustainable and future-ready platform. Within just a few months, a small team launched the first microservice, achieving measurable results:
- 30% cost savings through dynamic scaling with Kubernetes and Karpenter
- 30% reduction in operational effort via Kubernetes auto-healing
- Faster deployments enabled by GitOps and Argo CD
- Drastic reduction in testing time from two months to two weeks with k6 on Kubernetes
"Kubernetes combined with Argo and Istio are transforming how organizations build and operate software at scale," said Chris Aniszczyk, CTO of CNCF." Tokyo Gas is a great example of what's possible when these technologies come together. By leaning into open source and cloud native best practices, it has made its systems more agile, sustainable, and ready to meet the needs of a rapidly evolving energy market."
As Tokyo Gas continues to expand its microservices-based architecture, its success highlights how open source technologies can power not only innovation, but also environmental responsibility. Their upcoming KubeCon + CloudNativeCon Japan presentation will offer practical insights for organizations at the beginning of their cloud native transformation.
For more information and the full event schedule, including Tokyo Gas's session "From Legacy to Lift-Off: How Tokyo Gas Accelerated Innovation with Kubernetes, Argo CD, and Istio" on 17 June, visit: https://events.linuxfoundation.org/kubecon-cloudnativecon-japan/
Additional Resources
- CNCF Newsletter
- CNCF Twitter
- CNCF Website
- Learn About CNCF Membership
- Learn About the CNCF End User Community
About Cloud Native Computing Foundation
Cloud native computing empowers organizations to build and run scalable applications with an open source software stack in public, private, and hybrid clouds. The Cloud Native Computing Foundation (CNCF) hosts critical components of the global technology infrastructure, including Kubernetes, Prometheus, and Envoy. CNCF brings together the industry's top developers, end users, and vendors and runs the largest open source developer conferences in the world. Supported by more than 800 members, including the world's largest cloud computing and software companies, as well as over 200 innovative startups, CNCF is part of the nonprofit Linux Foundation. For more information, please visit www.cncf.io.
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