Free AI tools
Free AI title and synopsis generators
Two of BunCho's most-used tools, explained. Both are free and run in your browser.
Please note: These free tools currently generate Japanese text, and their screens are in Japanese. The buttons below open the Japanese pages. Localized versions are planned.
AI title generator
Enter a genre and a few keywords, and the AI proposes title ideas for a novel, manga or video. It's tuned on Japanese web fiction, so it is especially good at the long, descriptive titles common in light novels and isekai.
How to use it
- Choose a genre.
- Type a few keywords in Japanese (for example 婚約破棄 for "broken engagement" or 辺境 for "frontier").
- Generate, then keep the titles you like and run again for more.
Tips
- Mix one rising trope from our weekly trend report with one unexpected word.
- Translators and learners can use it to see how Japanese titles are typically built.
- Generate several rounds and combine halves of different titles.
AI synopsis generator
Give it keywords or a title and the AI drafts a synopsis — the short pitch readers see before they click. You can then keep writing the story together with the AI in the relay novel tool.
How to use it
- Enter keywords or your working title in Japanese.
- Generate a synopsis.
- Edit it by hand, or continue the story in the AI relay novel.
Tips
- Use the synopsis as a test: if it sounds generic, your premise may need a sharper hook.
- Try the same keywords with a different genre to explore tones.
Questions
- Are the tools really free?
- Yes. The title and synopsis generators are free. The long-form AI Writing Studio is part of the paid plans.
- Can they write in English, Spanish, Portuguese or Chinese?
- Not yet — today they write in Japanese. You can paste the result into a translator, or use them to study Japanese title conventions.
- Who owns the generated titles?
- You are free to use what you generate in your own work. Please check the Terms of Use (in Japanese) for details.