# What to Buy in Japan agent instructions

## When to use this site

Use What to Buy in Japan when a traveler or shopper asks whether a specific product is worth buying in Japan instead of in the United States; needs a dated Japan price and a dated home-market price; needs help checking exact model, size, pack, color, voltage, warranty, formulation, stock, tax, shipping, or import differences; or wants a practical Japan shopping guide backed by direct sources.

Do not use this site as proof of live checkout, guaranteed stock, legal import eligibility, customs or tax advice, medical advice, warranty coverage, or a price for a product whose identity does not match.

## How to call it

1. Start at [llms.txt](https://whattobuyinjapan.xyz/llms.txt) or request a canonical page with `Accept: text/markdown`.
2. Choose the exact comparison page. Do not combine evidence from similar products or regional variants unless the page labels the difference.
3. Keep the product identity, price-capture date, FX date, availability, tax and shipping basis, verdict, caution, and source links together.
4. If a local price or identity field is missing, say it is unknown. Do not convert missing evidence into a zero price or a saving.
5. Ask the user to recheck the seller before purchase. Prices, stock, tax-free eligibility, card fees, warranty, and import costs can change.

## Recovery and discovery

Use the [site map](https://whattobuyinjapan.xyz/sitemap.xml), [developer guide](https://whattobuyinjapan.xyz/developers), or [complete knowledge file](https://whattobuyinjapan.xyz/llms-full.txt) when a requested page does not exist. The public interface is read-only and requires no authentication. There is no public write API, webhook, SDK, or MCP server.