Gmail_検索補助 is a Chrome add-on developed by Web_akira that aims to assist users in refining their Gmail searches. This free tool adds a right-click menu to the search box in Gmail, allowing users to quickly input search operators. By installing this extension, users can easily input operators such as "is:unread" (unread) and "has:attachment" (with attachment) from a Japanese menu. This eliminates the need to constantly search for the correct syntax and operators when performing advanced searches in Gmail. The extension comes preloaded with frequently used operators, and the developer is open to adding more based on user requests. With Gmail_検索補助, users can streamline their Gmail searches and improve their productivity.