Vertical Japanese PDFs feel natural on paper but awkward on a screen: zooming turns reading into dragging between columns, and copied text often comes out in the wrong order. For non-native readers, dense vertical columns make it especially easy to lose your place, jump to the wrong line, and break concentration. Mooon reads the page in the order a person would, then rebuilds its content as a continuous horizontal text flow. Horizontal layout is the visible result; restored reading order is the real transformation.

The new Mooon Doc remains connected to the corresponding positions in the original page, so you can check the reconstructed passage against its source. Your original PDF stays unchanged.

Not a rotation, but a reconstruction

A normal PDF reader preserves fixed columns on a fixed page. Rotating that page or changing the direction of navigation does not recover the text, fix its order or let it reflow with the screen.

Mooon recognizes the visible Japanese and the layout together. It follows vertical columns, multi-column structures and other complex arrangements in natural human reading order, then rebuilds the content as a document rather than a collection of page fragments.

Turn vertical Japanese into a natural text flow

1. Upload the PDF. It can be a digital document or an image-only scan.
2. Mooon reads the page in natural order. It identifies the text, columns and the sequence in which they belong.
3. The content becomes a continuous horizontal document. It can flow with the reading space instead of remaining trapped in fixed vertical columns.
4. Continue in the Mooon Doc. Check a passage against its original position, correct the body text, add furigana and keep working in the same document.

The point is not to declare horizontal writing better than vertical writing. The original page was designed for paper; the Mooon Doc gives the same content a structure that is easier to read, annotate and edit on a screen.

Once the reading order is right

Click Add Furigana to place readings above the corresponding Japanese throughout the document. Paragraph translation can remain aligned with the source, and the same text can become audio. Recognized text, individual readings and translations can all be corrected where they appear.

Scanned vertical pages go through the same visual recognition and reconstruction, so you do not need a separate OCR tool before using these features. The result remains editable, can be revisited later, and can be exported when you need a copy elsewhere.

FAQ

Can Mooon convert a scanned vertical PDF? Yes. Mooon reads the Japanese and layout directly from the visible page, restores the reading order and rebuilds the content horizontally.

Will the original vertical PDF be changed? No. Mooon creates a separate Mooon Doc and leaves the source file untouched.

Can I locate the reconstructed text in the original page? Yes. The processed content remains connected to its corresponding source position.

Can I edit the horizontal result? Yes. The recognized body text is editable, as are individual furigana readings and paragraph translations.

Can I keep the original vertical design? The Mooon Doc is a reconstructed horizontal version. The original PDF remains available whenever you need its page design.

Can I add furigana and translation? Yes. For PDFs, you can add full-text furigana and keep paragraph-by-paragraph translation with the reconstructed source.

Can I export it? A Mooon Doc can be exported as PDF or EPUB.

Read the content, not the columns

Upload the vertical PDF. Mooon will restore the order in which it was meant to be read and turn it into a document you can continue using.