Wood41 wrote:
Tax free 
supposedly)sealed up & to be used when out of Japan.
from the description in japan-guide, I think only consumable goods need to be sealed up
Japan Shopping Guide: How to Shop
Quote:
Tax free shopping is available to foreign tourists only at a small number of licensed stores (typically major electronics and department stores[/URL] in large cities) when making purchases of over 10,000 yen at a given store on one calendar day. In case of consumable goods, such as foods, medicines and cosmetics, the consumption tax is waived for purchases of over 5000 yen, but the package of such goods must be kept unbroken until after departure from Japan.