---
license: cc-by-4.0
pretty_name: 'Japanese Documents Dataset (PDF)'
language:
- ja
tags:
- pdf
- japanese
- document-understanding
- text-recognition
- ocr
- ai-research
- computer-vision
- text-extraction
size_categories:
- 1K<n<10K
---

# Japanese Documents Dataset (PDF)
*This dataset contains a curated collection of Japanese-language documents in PDF format. The corpus includes textbooks, research papers, news articles, public-domain books, and government publications written in Japanese. It is intended to support AI research in OCR, document understanding, and multilingual text recognition.*

## Contact
For queries or collaborations related to this dataset, contact:  
  - anoushka@kgen.io  
  - abhishek.vadapalli@kgen.io  

## Supported Tasks

- **Task Categories**:  
  - Document Classification  
  - OCR and Text Recognition  
  - Layout and Structure Analysis  
  - Language Modeling for Japanese  

- **Supported Tasks**:  
  - Extraction of Japanese text from PDFs  
  - OCR for Kanji, Hiragana, and Katakana scripts  
  - Classification of documents by type (academic, literary, official, educational)  
  - Benchmarking AI systems for Japanese document parsing and layout understanding  

## Languages

- **Primary Language**: Japanese  
- **Secondary Presence**: English numerals, Romanized Japanese, and technical symbols (common in bilingual or academic PDFs)  

## Dataset Creation

### Curation Rationale
The dataset was curated to improve AI systems’ ability to read and understand Japanese-language documents, including vertically written text and mixed-script layouts, enabling more accurate OCR and multilingual NLP research.

### Source Data
- **Contributors**: Open-access Japanese libraries, educational institutions, and public-domain repositories.  
- **Collection Process**: PDFs were collected from publicly available sources with clear open licenses permitting use for research and AI model training.  

### Other Known Limitations
- **Bias**: Primarily educational and official documents; limited representation of informal or handwritten material  
- **Layout Complexity**: Some documents contain vertical text or mixed Japanese-English layouts that may challenge OCR accuracy  
- **Script Variation**: Coverage includes modern Japanese; limited inclusion of historical or classical scripts  

## Intended Uses

### ✅ Direct Use
- Training OCR systems for Japanese text recognition  
- Research in document layout understanding and vertical text OCR  
- Digitization and analysis of Japanese-language academic or archival materials  

### ❌ Out-of-Scope Use
- Identifying or profiling individuals from document content  
- Commercial redistribution of copyrighted PDFs  
- Use in surveillance, handwriting identification, or behavioral analysis  

## License

CC BY 4.0