Three-Shake Engineer Ranks 3rd in Kubernetes Contributor Rankings, Featured in CNCF's Official Blog 'Japan's CNCF DevStats 2025'

Three-Shake Inc. (Headquarters: Chuo-ku, Tokyo; CEO: Takuma Yoshida; hereinafter "Three-Shake") is pleased to announce that Tsubasa Nagasawa (hereinafter "Nagasawa"), an engineer belonging to Three-Shake, has ranked 3rd in the contributor rankings for the Kubernetes project, as featured in the official blog of CNCF (Cloud Native Computing Foundation), "Japan's CNCF DevStats 2025." Official CNCF blog: https://www.cncf.io/blog/2026/03/12/japans-cncf-devstats-2025 ■ About CNCF CNCF (Cloud Native Computing Foundation) is a non-profit organization that promotes cloud-native technologies. CNCF's mission is "to make cloud native computing ubiquitous." CNCF promotes many open-source projects such as Kubernetes, Prometheus, and Envoy. CNCF projects like Kubernetes gather support from diverse communities. Furthermore, it brings together top-level developers, end-users, and vendors from around the world to host large-scale open-source developer conferences. CNCF Official Website About page: https://www.cncf.io/about/who-we-are/ ■ About CNCF DevStats CNCF DevStats is a tool that aggregates and quantifies all contribution activities in CNCF Projects from GitHub. By utilizing this data, development activities within CNCF Projects can be analyzed from various perspectives. Among these, the "Contribution" metric quantifies contributions through reviews, comments, commits, Issues, and Pull Requests (PRs) on GitHub. This metric allows for a quantitative understanding of the degree of contribution to a project. Furthermore, contributions can be aggregated from various angles, such as by country or by individual. The official CNCF blog "Japan's CNCF DevStats 2025" introduces the data from DevStats in Japan for 2025, with a particular focus on individual contributions. It looks back at how Japanese engineers performed in 2025. ■ Ranked in Kubernetes Project Contributor Rankings The official CNCF blog "Japan's CNCF DevStats 2025" introduces 10 highly contributing individuals from the top 5 CNCF Graduated projects with the most Japanese contributors. Nagasawa, an engineer belonging to Three-Shake, ranked high in the contributor rankings for "Kubernetes," a CNCF Graduated project. ● Kubernetes Contributor Rankings ・ Contributor ranking for "kubernetes/kubernetes repository" Nagasawa ranked 3rd. ■ Introduction of Three-Shake Engineer Nagasawa ● Tsubasa Nagasawa, Software Engineer, Sreake Division, Three-Shake Inc. (@toversus26) For the past few years, he has been involved in building and operating platforms centered around Kubernetes. As a hobby, he tracks the latest trends in Kubernetes and shares information on major bugs and new feature development status on his blog. He also works as a Kubernetes contributor, focusing particularly on the SIG-Node area. As an extension of my hobby of observing Kubernetes development, I have continuously engaged in contributing to Kubernetes. I have actively performed code reviews to reduce the burden on maintainers and have also worked on improving the stability of new features and fixing bugs. I am very honored to be featured in this blog post again this year, following last year. I intend to continue my contributions at my own pace and contribute to the development of Kubernetes and its ecosystem. [Contact for this matter] For inquiries regarding this matter or requests for interviews with the translator, please contact: Kuramoto, Sreake Division, Three-Shake Inc. TEL: 03-4500-7378 E-Mail: sreake-sales@3-shake.com ■ What is "Sreake"? "Sreake" is Three-Shake's core business, Japan's first accompanying consulting service for the introduction and practice of SRE (Site Reliability Engineering). In areas requiring high technical expertise such as finance, manufacturing, retail, AI, and media, we support the introduction of cloud-native technologies and development/operation processes based on Google's SRE philosophy. We consolidate knowledge of the latest technologies such as Google Cloud, AWS, Kubernetes, Observability, DBRE, and MLOps, and establish "infrastructure" including culture, aiming to support companies in internalizing SRE. Service website: https://sreake.com/ [About Three-Shake Inc.] Three-Shake is a technology company with a strong focus on IT infrastructure technology. Since its establishment in 2015, its SRE consulting business "Sreake" has provided consistent support from technical strategy to design, development, and operation by professionals highly skilled in AWS / Google Cloud / Kubernetes. Based on the expertise cultivated in the SRE domain, in April 2020, we launched "Reckoner," a cloud-based data integration tool, making it easy to utilize big data for business analysis and marketing. Subsequently, we launched "Relance," a talent introduction service specializing in freelance engineers, and "Securify," a security service, advancing a system that can consistently provide everything from technical strategy design to secure application development and data utilization in the DX era. Company Name: Three-Shake Inc. Representative: Takuma Yoshida, President and CEO Location: Sumitomo Fudosan Shiodome Hama-rikyu Bldg. 7F, 8-21-1 Ginza, Chuo-ku, Tokyo Business Activities: Operation of SRE-specialized consulting business "Sreake" (https://sreake.com/) Development and operation of security service "Securify" (https://www.securify.jp/) Development and operation of cloud-based data integration tool "Reckoner" (https://reckoner.io/) Operation of freelance engineer specialized talent introduction service "Relance" (https://relance.jp/) Company Website: https://3-shake.com/