主題

1. Origins, structure, and basic meaning

• Structure: 主題(しゅだい) is the central content of a work or discussion.
• Basic usage: It names a novel's central theme or the subject a meeting should focus on.

2. Common pitfalls and similar expressions

• Content compared with 題名
  • 題名(だいめい) is the title given to a work. 主題 is its central subject, so asking for a novel's title differs from asking about its theme.