Help & Support
Get help using Jozu
Frequently Asked Questions
What document formats are supported?
Jozu supports PDF files and common image formats (JPG, PNG, WebP). You can upload documents by taking photos with your phone or uploading existing files. HEIC photos are not supported yet: save them as JPEG or PNG first.
How accurate is the AI translation?
Our AI translation is powered by Claude, achieving high accuracy for official Japanese documents. However, for critical legal matters, we recommend consulting a professional translator.
Tips for best translation accuracy
Our AI achieves excellent results with most documents, but here are some tips to get the best translations:
- Clear photos help: Good lighting and sharp focus improve accuracy, especially for small text
- Similar-looking katakana: Characters like シ/ツ and ソ/ン can occasionally be confused—worth double-checking names written in katakana
- Foreign names: Names transliterated into katakana may have multiple valid spellings
- Handwritten text: Printed documents translate more reliably than handwritten ones
- Verify important details: For critical items like names, dates, and amounts, a quick manual check is always a good idea
Is my data secure?
The text of your documents, their translations and your alert notes are encrypted with a key unique to your account before they are stored. Documents are processed by Anthropic's API, which does not use them to train AI models and keeps them for up to 30 days, longer only if flagged for trust and safety review or required by law. Our privacy policy has the details.
Can I cancel my subscription anytime?
Yes, you can cancel at any time from the Billing page. You keep access until the end of the month you have paid for. Partial months are not refunded, except where the law requires it (see our terms).
What does the free trial include?
The free trial lasts 14 days from sign-up and includes up to 3 documents. After that, Jozu Pro is ¥2,500 a month. You can always view the documents you have already added.