Hirota worked on the jellyfin/jellyfin repository, delivering Japanese localization to enhance accessibility for Japanese-speaking users. Using JavaScript and leveraging translation tools like Weblate, Hirota integrated native Japanese UI strings into the core codebase, ensuring consistent language support throughout the interface. The work involved preparing the localization pipeline for future internationalization efforts, laying the groundwork for broader language coverage. While the contribution focused on a single feature, it addressed a clear user need by improving the user experience for non-English speakers. The depth of the work was in the integration and pipeline setup, rather than in bug fixing or feature breadth.