When you use TTP machine to enter, the visitor entry is printed on the rear of TTP card (no passport sticker). Someone had an image into his thread.
Japan to begin Trusted Traveler Program (TTP) on Nov 1, 2016.

https://www.moj.go.jp/isa/publicatio...ine_index.html


Downside = some retailers may not be familiar enough with the TTP card and deny tax-free.