The Sakamichi Auto-fill Tool is a Chrome extension designed to simplify the ticket application process for fans of the Sakamichi idol groups, including Sakurazaka46 and Hinatazaka46. This tool automates the filling of ticket application forms, allowing users to manage multiple profiles easily. It supports quick entry of personal details such as name, date of birth, contact information, and Plus member ID, ensuring a seamless experience during high-demand ticket sales.

To utilize the extension, users must first install it from the Chrome Web Store and input their personal information. The tool includes a mobile mode feature, essential for accessing the ticket application page, which typically requires mobile formatting. Once on the application page, a floating button appears for quick auto-fill, making it easier for users to complete their applications. The tool also offers options for data backup and profile management, enhancing its functionality for avid fans.