# Denpyo

> Receipt and expense digitization SaaS for Japanese freelancers and small businesses. AI-powered OCR extracts accounting data from photos of receipts, invoices, and transfer vouchers.

## About

Denpyo helps Japanese freelancers and small business owners digitize their paper receipts and expense documents. Users photograph receipts, invoices (請求書), and transfer vouchers (振替伝票), and our AI extracts structured accounting data including dates, vendors, amounts, and expense categories.

Available across Japan and Asian markets (JP, HK, SG, MY, TW, KR, VN, PH).

Key features:
- AI-powered OCR using Google Gemini for Japanese document recognition
- Automatic expense categorization (勘定科目)
- Tax savings calculator showing estimated deductions (節税効果)
- Multi-language support (Japanese, English, Chinese, Korean, Portuguese, Vietnamese)
- Secure cloud storage with Supabase

## Target Users

- Japanese freelancers (フリーランス)
- Individual business owners (個人事業主)
- Small and medium businesses
- Anyone doing Japanese tax filing (確定申告)

## Supported Document Types

- Receipts (レシート)
- Invoices (請求書)
- Transfer vouchers (振替伝票)
- Expense reports (経費精算書)
- Card statements (カード明細)
- Bank statements (通帳)

## Key Pages

- https://denpyo.com/ja : Landing page (Japanese) — product overview + pricing
- https://denpyo.com/en : Landing page (English)
- https://denpyo.com/ja/blog : Japanese tax & accounting blog (primary content engine)
- https://denpyo.com/en/blog : English blog

## Top Guides

- https://denpyo.com/ja/blog/timee-gig-work-tax-guide-2026 : タイミー等ギグワークの確定申告ガイド (gig-work / Timee tax filing)
- https://denpyo.com/ja/blog/side-job-tax-filing-privacy-2026 : 副業の確定申告と会社にバレない方法 (side-job filing & privacy)
- https://denpyo.com/ja/blog/mid-year-resignation-tax-refund-2026 : 退職後の確定申告・還付ガイド (post-resignation tax refund)

## Free Tax Tools

- https://denpyo.com/ja/tools : All free Japanese tax calculators
- https://denpyo.com/ja/tools/furusato-calculator : ふるさと納税控除シミュレーター (furusato nozei)
- https://denpyo.com/ja/tools/tax-savings-estimator : 節税効果シミュレーター (tax savings estimator)
- https://denpyo.com/ja/tools/income-tax-calculator : 所得税計算ツール (income tax)
- https://denpyo.com/en/tools/tax-savings-estimator : Tax savings estimator (English)

## Technical Stack

- Next.js 16 with App Router
- Supabase for authentication, database, and storage
- Google Gemini AI for OCR and data extraction
- Stripe for payments (Japan)
- Deployed on Vercel

## API

Denpyo does not currently offer a public API. The service is designed for end-user interaction through the web application.

## Contact

- Website: https://denpyo.com
- Support: Available through the application dashboard

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