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How to use Fuseji

Getting started

1. Install. On Mac, open the downloaded Fuseji-arm64.dmg, drag Fuseji to Applications, then open it. On Windows, open the downloaded Fuseji-x64.exe and follow the installer (no administrator rights needed). Fuseji opens when it finishes, and a “Fuseji” shortcut appears in the Start menu and on the desktop.
2. Open. Click PDF・画像を選ぶ (Choose PDF or image) or drag a PDF onto the home screen. Recent files stay on the home screen.
3. Analysis type. On the home screen, choose “Personal data” or “Contract template.” With Contract template, amounts, dates, and periods also become candidates, and underline becomes the default redaction style.
4. Wait. Fuseji reads the PDF and surfaces personal-data candidates, each highlighted on its page.
5. Export. Once you've reviewed, click 書き出す (Export), pick a filename and format, and save. Verification runs automatically.

Tip: password-protected PDFs prompt you for the password on the home screen.

Review

Detected candidates appear in the right-hand list.

• 候補 (Candidates) — grouped by type. Toggle a whole type or a single term on or off.
• 要確認 (Needs review): marks medium-confidence candidates. They start ON, so turn OFF anything you do not want redacted. Low-confidence candidates start OFF.
• このページを確認済みにする (Mark page as confirmed) — check this once a page is reviewed. It's recorded in the verification report.
• 手動の範囲 (Manual regions) — drag on the page to add a seal, photo, or signature as a region-to-redact candidate.
• Preview — the checkbox at the top of the screen (shortcut: P) switches to exactly how the exported file will look. You can also change the redaction style here.

Click a term to jump to its next occurrence. 文書全体に適用 (Apply to document) adds the term across all pages at once.

Export

• 消し方 (Redaction style) — black (default), label replacement (【氏名1】 etc.), white-with-border (for printed submissions), or underline (for contract templates with blanks to fill in).
• 文字の検索・コピー (Search and copy) — keep text outside the redactions searchable and copyable, or rasterise every page (safest).
• 画質 (Quality) — 300dpi (standard) or 400dpi (higher, larger file).
• Redaction reasons (Pro and up) — turn on “Add a reason” on the confirmation screen, and “Write the reason in the box” puts the reason you chose inside the black box. The list of reasons is included in the verification report.

Verification runs immediately after export. If it fails, the file isn't saved.

Verification report

Redaction counts (by type and page), residual-check results (full-text, plus OCR on Pro and Office), removal results for annotations/attachments/metadata, and a list of unconfirmed pages. Save as PDF or CSV.

Inspector

Open 剥がしテスト (Inspector), pick a PDF redacted by another tool, and Fuseji checks for residual text, hidden characters, annotations, attachments, metadata, and bookmarks. Detection, review, export, and inspector are available in the free version.

Dictionary

Add always-redact and never-redact terms, one per line. Client names and case parties go in always-redact; your own firm name and courts go in never-redact. Pro lets you export and import dictionaries for sharing.

Batch (Pro)

Pick a folder under 一括処理 (Batch) and Fuseji applies the same dictionary and rules to every PDF, giving you a list to review.

Masking text before it goes to generative AI (mini window)

Before you paste text into a generative AI, Fuseji replaces personal information with placeholders (such as 【氏名1】) entirely on your computer. Placeholders that come back in the AI’s answer can be restored to the original words. No PDF is made; only the clipboard is used, and nothing new is sent anywhere.

• Turn it on. In 設定 (Settings), turn on 文章を伏せる（ショートカット） (Mask text — shortcut). While it is on, Fuseji stays in the menu bar (the notification area on Windows) and starts at login. While it is off, nothing stays running.
• Mask. Copy the text you want to give the AI and press ⌘⇧Y (Ctrl+Shift+Y on Windows). The mini window shows the masked text; check it and press Enter to put the masked text on the clipboard, then paste it into the AI. Press Esc to close without changing anything.
• Restore. Copy the AI’s answer and press the same keys. The mini window shows the text with placeholders turned back into the original words; check it and press Enter to put it on the clipboard. Placeholders Fuseji does not know (made up or altered by the AI) are shown in red and left as they are.
• Change the keys. You can change the shortcut in 設定 (Settings).
• The table of placeholders and original words is kept only in your computer’s memory. It is never written to disk or sent anywhere, and it is gone when you quit the app — restore before quitting.
• If the check after masking finds words that were not masked, you cannot copy until you mask them. Words that look suspicious are underlined in red; click one to mask it this time only or always.
• The free version masks up to 2,000 characters at a time. Restoring is free with no limit.

You are the one who makes the final check that nothing was missed. If you use generative AI for work, we recommend a business plan whose inputs are not used for training. Also, if you use another app that keeps a clipboard history, the original text you copied may remain in that app; Fuseji cannot prevent that.

License

• The free version is unlimited in time. Exports carry a watermark; saving the verification report, batch, shared dictionaries, and strict (OCR) verification are disabled.
• After purchase, paste the key from the receipt email into 設定・ライセンス (Settings → License).
• One key covers 1 computer (Personal), 2 computers (Pro), or 5 computers (Office). To move to another computer, first click このパソコンの登録を解除 (Deactivate this computer) on the old one.
• One year of updates is included. After that, your installed version keeps working. From the second year, an optional “One Year of Updates” (25% of the purchase price, tax included: Personal ¥995, Pro ¥3,200, Office ¥9,950) keeps the updates coming.
• From January 1, 2027, 設定・ライセンス (Settings → License) shows your referral code and link. Buyers who use it get 20% off, and you get one free year of updates per referral.
• If you lose your license key, open the customer page and sign in with the email address you used to buy. Your key is shown there at any time.

Troubleshooting

Does it run on Windows?

Yes. Fuseji runs on Windows 10 / 11 (x64, 22H2 or later). Windows on ARM is not supported. Open the download page on Windows and you get the Windows version. HEIC images open on Mac, iPad and iPhone; on Windows use PNG or JPEG (automatic face detection (beta) works on Windows too).

Uninstalling

On Mac, quit Fuseji, move it from Applications to the Trash, and delete the folder ~/Library/Application Support/Fuseji. On Windows, uninstall Fuseji from Settings → Apps, and delete the folder %APPDATA%\Fuseji. That removes Fuseji’s settings and dictionaries; we keep no copy. Exported files, reports and the log stay where you saved them.

Still stuck?

If something didn’t work, use うまくいかなかった例を送る (Report what didn’t work) in the app (only a diagnosis with the characters masked by type is sent). For anything else, email [email protected]. Please don’t send the documents themselves.