During April 2025, this developer focused on enhancing documentation quality in the toss/frontend-fundamentals repository by addressing Japanese grammar for improved maintainability. The primary contribution involved identifying and correcting an unnatural Japanese phrase, replacing it with a more natural and grammatically accurate expression to ensure clarity and consistency throughout the documentation. This work was carried out using Markdown, leveraging strong documentation skills to improve readability for both current and future contributors. By refining language and terminology, the developer contributed to a more maintainable codebase, demonstrating attention to detail and a commitment to clear communication within technical documentation workflows.