Contributed to the tldr-pages/tldr repository by implementing Japanese translations for the pbcopy and pbpaste command references, expanding localization coverage for essential command-line tools. Focused on documentation and translation using Markdown, the work enhanced accessibility for Japanese-speaking users and reinforced internationalization workflows within the project. The approach involved end-to-end localization, from creating accurate translation content to integrating it seamlessly with existing documentation. By delivering a focused, review-friendly commit, the contribution supported reproducible and maintainable updates to the repository. This work demonstrated attention to detail in documentation, localization, and translation, addressing the need for broader language support in widely used CLI resources.