The filers need to contact the previously designated contact point of Japan Customs. In case that Japan Customs recognizes the difficulties in electronically filing cargo information through NACCS because of electronic or communication problems, etc, the filers need to file cargo information in writing by the deadline of filing according to the instruction of Japan Customs.

However, it is exempted from filing in case of the difficulties occurred due to natural disasters such as an earthquake, etc. or man-made disasters such as a war, etc.