Amazon Japan Price Tracking

Never miss a
price drop again.

Lumen monitors Amazon Japan prices in real-time. Track any product, get instant alerts, and buy at the right moment.

Enter an ASIN or full Amazon Japan product URL

View API Try Scraper

Real-time

Price updates as they happen

API-first

JSON responses, easy integration

¥ JPY

Native yen price tracking

ASIN / URL

Flexible product lookup

What Lumen does

🔍

URL or ASIN

Pass any Amazon Japan product URL or ASIN — Lumen normalizes and tracks it automatically.

📊

Price History

Every scrape is timestamped. Query the API to see price trends over days, weeks, or months.

⚡

Real-time Scraping

Powered by Playwright for reliable, JavaScript-rendered price extraction from Amazon Japan.

🔗

REST API

Clean JSON endpoints. POST to add products, GET to query history. Integrate anywhere.

API at a glance

// Scrape a product by URL or ASIN 
# POST /api/scrape
$ curl -X POST https://lumen-price.polsia.app/api/scrape \n  -H "Content-Type: application/json" \n  -d '{"url": "https://www.amazon.co.jp/dp/B09V3KXJPB"}'

{
  "product_id": 1,
  "asin": "B09V3KXJPB",
  "price_jpy": 4980,
  "currency": "JPY",
  "scraped_at": "2026-06-14T07:30:00Z"
}

# GET /api/products — fetch tracked products with latest prices
$ curl https://lumen-price.polsia.app/api/products

{
  "products": [...],
  "count": 1
}