CROSS-BORDER PUBLISHING
Create in your own language. Publish for readers in another culture. BOOK:// supports translation, editing, design, and publishing files — all with AI.
Don't let your knowledge and stories end at one language. Don't let the world's best books be kept out of reach by a language barrier.
TWO DIRECTIONS
Japanese books for readers abroad. Books from abroad for Japanese readers. Both directions run through the same studio.
JAPAN TO GLOBAL
A book made in Japanese, finished for a market abroad. We add the cultural background readers will need, redesign the title and cover, and deliver a book that people in that country will actually pick up.
GLOBAL TO JAPAN
A book written in English or another language, finished for Japanese readers. We add glossaries and translator's notes, and set the book in the typographic conventions Japanese readers expect.
AI LOCALIZATION
Swapping the words does not change the reader. Localization means finishing the book itself around the fact that the reader has changed.
TRANSLATION
The text is carried into another language. That's the starting point — not the finish.
AI LOCALIZATION — BOOK://
On top of translation, the book is finished for the readers of the market you want to reach.
The AI proposes; you decide what to accept. Any proposal that would change the intent of the original is always shown together with its reasoning.
TOOLS
What breaks first in cross-border publishing is proper nouns and store-page copy. BOOK:// manages both with dedicated tools.
Names, places, dishes, technical terms. Register the source term, its reading, its romanization, and its rendering in each language, and the same form is used throughout the book. The AI also extracts proper-noun candidates from your text, so nothing slips through.
| TYPE | SOURCE | READING | ROMANIZED | ENGLISH | STATUS |
|---|---|---|---|---|---|
| Dish | 出汁 | だし | dashi | dashi (Japanese soup stock) | Fixed |
| Place | 通り土間 | とおりどま | tori-doma | tori-doma (earthen-floor passage) | Fixed |
| Person | 親方 | おやかた | oyakata | oyakata (master craftsman) | Fixed |
| Tool | 柳刃包丁 | やなぎばぼうちょう | yanagiba | yanagiba knife | Candidate |
The screen is a diagram; the table contents are examples showing how the glossary works.
Not just the title: the sales-page description, author bio, search keywords, and category candidates are prepared separately for each market. The same book sells with different words on a Japanese shelf and a North American one.
SUPPORTED
What works today, and what's still in preparation — written plainly.
| Japanese & English | Quality-assuredFully supported — creation, translation, localization, and publishing-file output. |
|---|---|
| Chinese (Simplified & Traditional), Korean, Spanish, French, German, and others | In preparationYou can select these as a manuscript language, but we cannot yet guarantee translation and typesetting quality. The studio shows this same notice when you select them. |
| Vertical Japanese text (tategaki) | BetaVertical or horizontal layout can be chosen for the body text; vertical text in print-ready PDF is currently in beta. Please check the preview before relying on it. |
| Publishing on Amazon | We prepare the KDP submission package and instructions for each marketplace. Registering and publishing on Amazon is done by you, through your own KDP account. |
CROSS-BORDER SAMPLES
Cross-border publishing is never a plain language swap. Title, cover, and structure all change for the market you want to reach. Four examples:
01 A JAPANESE CHEF'S BOOK → ENGLISH-SPEAKING MARKETS
02 AN OVERSEAS RESEARCHER'S BOOK → JAPAN
03 A JAPANESE REGIONAL-CULTURE BOOK → THREE FORMS
04 AN OVERSEAS FOUNDER'S BOOK → A JAPANESE BUSINESS BOOK
All four are concept examples, unrelated to any real books, people, or organizations. More examples on the Samples page.
PRICING
An AI-powered plan, and an individually quoted service with human editors. Prices are in Japanese yen (JPY), tax included.
GLOBAL EDITION
One-time purchase per language and market
from ¥14,800 / per language & market
Additional fees may apply depending on book length, image count, language, and market. The exact amount is always shown before you purchase.
GLOBAL STUDIO
Cross-border publishing with human editors (individual quote)
Individual quote
We quote after hearing your project and budget. Contact us to talk it through.
Payment is via PayPal — used in more than 200 countries and regions. See the full pricing page for all plans.
Start by making one book. The overseas edition can come after it's finished.
Copyright for all text, images, illustrations, design, data and systems on this site belongs to J-Catalyst LLC or the respective rights holders. Use beyond what is permitted by copyright law requires prior permission.
For quotation, coverage, republication, collaboration, or use of our data and systems, please contact us first. We will look at what you have in mind and let you know what is possible.
© 2026 J-Catalyst LLC All rights reserved. — 2026-08-04b