All Japanese scripts
Kanji, hiragana, katakana, and romaji recognized in the same document.
Vertical & horizontal
Both tategaki (vertical) and yokogaki (horizontal) text layouts.
Signs & menus
Photograph Japanese signs, restaurant menus, or product labels.
Documents & books
Scanned Japanese documents, textbooks, and manga pages.
Mixed languages
Japanese mixed with English or other languages in the same image.
Translate after extraction
Extract Japanese text then translate to English or any language.
日本語OCRが難しい理由
- Recognizing three distinct writing systems (hiragana, katakana, kanji) intermixed in a single sentence
- Handling vertical text layouts (tategaki) common in novels, newspapers, and traditional documents
- Distinguishing between thousands of visually similar kanji characters with subtle stroke differences
- Processing furigana (small reading aids above kanji) without merging them into the main text line
- Correctly segmenting Japanese text which has no spaces between words
PDFや画像から日本語テキストを抽出する方法
- Go to fastocr.org
- 日本語の画像またはPDFをアップロードしてください。言語は自動的に検出されます。
- 処理を待ちます — 画像は数秒、PDFは進行バーが表示されます。
- 結果をダウンロード：検索可能なPDF、テキストファイル、またはテキストを直接コピーします。
日本語OCRの精度を上げるためのヒント
- Specify vertical text mode if your document uses tategaki (top-to-bottom) layout
- Use 300+ DPI scans to preserve fine stroke details that distinguish similar kanji
- For documents with furigana, expect the small reading text to appear inline — manual cleanup may be needed
- Crop headers and footers before processing to avoid mixing navigation text with body content
- Review kanji carefully — visually similar characters like 土/士, 末/未, 大/犬 are common OCR errors
日本語OCRの一般的な使用例
- Digitizing Japanese business contracts and corporate filings
- Extracting text from Japanese manga and light novel scans for translation
- Converting scanned Japanese academic papers and patent documents
- Processing Japanese government forms, tax documents, and certificates
- Archiving historical Japanese texts printed in traditional vertical layout
よくある質問
Does Japanese OCR handle all three writing systems?
Yes. FastOCR recognizes hiragana, katakana, and kanji in the same document, including mixed text with English characters.
Can it read vertical Japanese text?
Yes. Our advanced AI engine supports vertical (tategaki) text recognition. For best results, ensure the scan is straight and not rotated.
How accurate is Japanese OCR on kanji?
FastOCR achieves 96% accuracy on printed Japanese text. Complex or rare kanji may have lower accuracy — always review output.
Is Japanese OCR free?
Image OCR is free with no registration. PDF processing requires a free account and includes 1 free PDF per month.
Dedicated Japanese Tools
Free for images. No registration required.