Japanese PDF merge example — 2026-10-13

Self-authored source PDFs contain Japanese text, two area formulas, and three
Japanese bookmarks. A has two pages; B has one appendix page. Japanese text
uses embedded Noto Sans CJK; no private documents or student data are included.

Actual current product workflow: English PDF Merge Tool, one two-file chooser,
Sequential Merge with Keep Bookmarks enabled. First A then B; output downloaded.
Then B was moved before A with the drag handle's keyboard operation
(Space, ArrowUp, Space), output renamed and Start Merge clicked again.
Second native output downloaded. No sign-in/payment, OCR or translation occurred.

Native A→B result: 51,772 bytes, page order A1,A2,B1.
Native B→A result: 51,768 bytes, page order B1,A1,A2.
Both preserve the corresponding page text, decoded contents, embedded font
streams, dimensions and rotation. Source labels ORIGINAL PAGE A1/A2/B1 remain.
Japanese bookmark titles and hierarchy remain; targets change with page order.

The B→A download was reopened in the Chinese bookmark tool for additional QA.
All three bookmarks were clicked: appendix→1/3, chapter→2/3, example→3/3.
No bookmark edits or new export were made there. The advertised English bookmark
route showed an app 404 in this session and was not used as proof of an English
bookmark interface. The Japanese guide tells users to check in their PDF reader.

Files in this locally assembled proof ZIP:
- japanese-merge-a.pdf, japanese-merge-b.pdf: authored inputs.
- japanese-merged-ab.pdf, japanese-merged-ba.pdf: unchanged native downloads.
- native-merge-checks.json: source/output checks and bookmark positions.
- bookmark-clicks.json: observed clicks and the QA interface language.
- README.txt: this provenance note.

Screenshots show actual English merge settings and results. Contact-sheet page
previews were rendered locally from the unchanged output PDF, not reconstructed
as an ideal result. Input creation used local XeLaTeX; it is not a Doc2X export.

Scope: three simple horizontal Japanese pages with embedded fonts. No encrypted,
damaged, signed, form-heavy, vertical-writing, maximum-batch or large-file test.
The merge tool UI is English. A Japanese tutorial is not a Japanese tool UI.

日本語：本文A（2ページ）と付録B（1ページ）は自作サンプルです。英語版の
結合ツールで順番を変えて2回処理し、実際のPDFを保存しました。結果の
バイト列は変更していません。しおりの追加確認は中国語のツールで行い、
PDFは変更していません。ZIPは確認用にローカルでまとめたものです。
