Worked on improving documentation accuracy in the mdn/translated-content repository by clarifying the Reflect.deleteProperty API reference for the Japanese locale. Focused on correcting parameter and return value descriptions to accurately reflect delete semantics, replacing a previous mis-description that had referenced Reflect.defineProperty. This update involved editing three key lines in Markdown to ensure the Japanese translation aligned with the en-US source, reducing localization drift and supporting consistent developer guidance. Leveraged technical writing and documentation skills to enhance clarity, which helps prevent developer confusion and supports more reliable downstream learning materials for those referencing the MDN documentation across different languages.