Refers to a secondary title or heading added to a main title, such as in books, articles, or presentations.
The subtitle of this book is 'The Future of the Japanese Economy'.
レポートには副題を付けると内容が伝わりやすい。
Adding a subheading to a report makes the content easier to understand.
The novel has been given the subtitle 'A Story of Love.'
This movie has a subtitle.