Tatsuya Hayashino updated the Japanese kubectl installation guide for Linux in the kubernetes/website repository, focusing on improving onboarding and aligning with security best practices. He revised the documentation to reflect changes in the zypper workflow, ensuring users update zypper and verify the new repository’s GPG key before installation. Additionally, he enhanced the guide by linking to Kuberc configuration documentation, supporting a more complete setup process for Japanese developers. The work was delivered in Markdown and emphasized clear, accurate technical writing. Over the month, Tatsuya concentrated on documentation quality, addressing evolving installation requirements without introducing new bug fixes.