If you are not a Japanese resident, you are entitled to a VAT exemption on your purchases.
Ask for your tax-free form in the store.
Normal rate: 8%
Minimum Purchase: ¥10,501
Pay the sum of your purchases less the tax-free amount, or get a cash refund.
The store will staple all tax-free forms to be delivered to Customs in your passport.
Show your passport at Customs and they will collect the tax-free forms.