Korea, Republic of

Korea has run electronic single window system since March 2006 on the website https://unipass.customs.go.kr where customers can make an application related to requirements or declare imports, exports and others without having to visit relevant agencies.
As of May 2017, 26 agencies verifying requirements (for 55 requirements) are linked to the single window system which has processed 855,244 cases out of 896,960 (95.3%).