不明白才问的，我在日本海关网站上看到下面信息，不是你说的不用过海关

Do you go through customs when you leave Japan?

 

 

When leaving Japan, at the airport or seaport of departure, if you do not have “Record of purchase slip”, please present your passport at customs. if you have “Record of purchase slip(s)”, please submit the record of purchase slip(s) at customs.

https://www.customs.go.jp › summary

Procedures of Passenger Clearance : Japan Customs