関税局―災害規定を適用―納付等の延長について 掲示
CTB says it applies Article 2-3 “Extension of time limit due to disaster” for processing
https://www.customs.go.jp/news/news/20200511_index.htm
(Only Japanese announcement)
One of the extensions enables by this customs’ action is the rescheduling of the date of settlement (or liquidation) stated in Article 7-2 “Special provision for declaration”. However, customs holds the security which the declarant/payer has provided.
Customs also arranges other lenient measures for dues and fees but better read the articles and the announcement cautiously.