電撃文庫 Price Intelligence

Price tracking and analysis tool for 電撃文庫 (Dengeki Bunko) light novels.

🔒 Security Note

Rakuten API credentials are NEVER stored in the code or GitHub.

• Application ID and Access Key are stored in your browser's localStorage only
• Credentials are sent only to Rakuten API (https://app.rakuten.co.jp/)
• Nothing is committed to GitHub or sent to any third-party server

Features

• Price Trends: Track price changes over years
• Monthly Growth: See price movements within each month (start/high/low)
• New vs Sequel: Compare first volume vs sequel pricing
• Tax Analysis: Understand tax impact on pricing
• Multiple Import Sources:
  • TSV/Tabular data from spreadsheets
  • Rakuten Books API (requires credentials)
  • Kadokawa API (via JSON import)

Quick Start

1. Deploy to GitHub Pages

# In your files directory:
git init
git add .
git commit -m "Initial commit"
git branch -M main
git remote add origin https://github.com/YOUR_USERNAME/YOUR_REPO.git
git push -u origin main

Then enable GitHub Pages:

• Go to your repo → Settings → Pages
• Source: Deploy from main branch
• Your site: https://YOUR_USERNAME.github.io/YOUR_REPO/

2. Register with Rakuten API

1. Go to https://api.rakuten.net/
2. Sign up for free
3. Create a new application:
   • Application name: Kadokawa Price Tracker (or any name)
   • Application URL: https://YOUR_USERNAME.github.io/YOUR_REPO/
   • Application type: Web
   • Allowed websites:

     YOUR_USERNAME.github.io
     

4. Copy your Application ID and Access Key

3. Import Data

Open your deployed GitHub Pages site:

1. Go to Import Data page
2. Scroll to Rakuten Books API section
3. Enter your Application ID and Access Key
4. Click 💾 Save Credentials (stored in browser only)
5. Configure search:
   • Keyword: 電撃文庫
   • Publisher: KADOKAWA
   • Genre ID: 001004008 (light novels)
   • Release Month: 2026-04 (for April releases)
6. Click 🔍 Fetch from Rakuten

Data Format (TSV Import)

Column	Description	Example
レーベル	Label code (1 = 電撃文庫)	1
発売月	Release month	2026 年 3 月刊
発売日	Release day	10
タイトル	Title	焼き祓え！ネット巫女つむぎちゃん
著者	Author	鎌池和馬
イラスト	Illustrator	ぶーた
定価	Price (tax-included)	814
ISBN	ISBN	978-4-04-916717-7

File Structure

├── index.html          # Main application
├── css/
│   └── main.css        # Styles
├── js/
│   ├── data.js         # Data store & transformations
│   ├── fetcher.js      # API fetchers (Rakuten, TSV parser)
│   ├── page-import.js  # Import page logic
│   ├── page-overview.js# Dashboard
│   ├── page-trend.js   # Price trends
│   ├── page-monthly.js # Monthly price growth
│   ├── page-newvsequel.js
│   ├── page-taxdist.js
│   └── page-yearly.js
├── .nojekyll           # Disable Jekyll processing
└── README.md

Technology

• Chart.js 4.4.1 for visualizations
• Vanilla JavaScript (no framework)
• No build step required
• Static hosting (GitHub Pages, Netlify, Vercel, etc.)

API Reference

Rakuten Books Book Search API

• Docs: https://api.rakuten.net/doc/booksbooksearch.html

License

MIT