I went to the shopping mall to buy iPhone6S. The price of iPhone6S(Gold 128GB unlocked SIM) is $849+$60.16(8.25% Tax) = $909.16. This price is around 20% lower than Japanese market price.
The one of unique advantage to buy this in TX is the TAX free services. After I bought iPhone6S at Apple store, I went to TAX free service office which is located in the same shopping mall. And then i presented the receipt and my passport to the staff. Then she checked my entry and departure date, and she immediately paid back 50% of TAX by cash.
There are 3 option of the payment such as Cash, Paypal and Personal check. In case of Paypal or Personal check 65% of TAX will be refunded. .
This is good for visitor and may give motivation to purchase things more than expected. Actually I may purchase more things before leaving TX.