Japan’s CNCF DevStats 2025

Comparing with 2024 Top 10 contributors in CNCF projects Kubernetes Kubernetes organization (overall) fluentd Containerd Cilium Envoy Overall top 20 in CNCF Wrapping up Posted on March 12, 2026 by Toru Komatsu and Hiroshi Hayakawa, CNCF Ambassadors and Cloud Native Community Japan. CNCF projects highlighted in this post Have you ever heard of CNCF’s DevStats ? It is a tool that tracks and quantifies all contribution activities within CNCF projects by pulling data from GitHub. Using this data, we can analyze ongoing development in CNCF projects from multiple perspectives. One of the key metrics is “Contribution,” which measures activities such as reviews, comments, commits, issues, and pull requests. This allows us to obtain a quantitative measure of the amount of work being done on a project. We can also break down these contributions by country or by individual. In this post, we examine the 2025 DevStats data for Japan, focusing particularly on individual achievements. Let’s take a look back at the impact Japanese engineers made over the past year. We ran a similar report last year and shared it on our blog. Since this is our second year doing this, let’s start with a quick overview of how things have changed. Note DevStats is continually refining its methods as data grow, so please keep in mind that there may be slight discrepancies when comparing year-over-year. The projects receiving the most Japanese contributions haven’t changed much, which shows that our community’s areas of interest remain consistent.