Please find the below linked announcement by Ministry of Land, Infrastructure, Transport and Tourism (MLIT) of Japan.
From the 1st of October 2020, ships are required to submit the following two documents to enter in Japanese ports.
We understand that Maritime Bureau will not allow ships, who do not have above two certificates to enter in Japanese ports.
Therefore this additional documentation is very important. We will ask for ship's cooperation to submit these additional documents in a timely manner.
We strongly suggest that your agents are informed well in advance if your ships do not have the above certificates on board.
Inchcape Shipping Services Japan
Query to All ISS Tokyo OPS AllISSTokyoOPS@iss-shipping.com