Y.Okady worked on modernizing the Node.js built-in module imports for the rest-api-client in the kintone/js-sdk repository. By updating import statements to use the node: prefix and removing deprecated node:module/require usage, Y.Okady improved compatibility with Node.js ESM and prepared the codebase for future Node.js versions. The work involved careful code refactoring and standardization of import patterns, reducing runtime risks and simplifying long-term maintenance. Using JavaScript and Node.js, Y.Okady focused on aligning the library with current best practices, resulting in a more reliable client library and smoother onboarding for contributors. The depth of changes reflects thoughtful engineering.