Announcement reposted from Amazon Japan:
On September 7, 2023, we announced the removal of customer handling charge of 330 JPY per unit for customers and the introduction of new FBA closing fee of 375 JPY per unit for all FBA sellers that are selling frozen food via FBA, effective November 6, 2023. While we removed the customer handling charge on September 29, 2023, the introduction of the FBA closing fee for frozen products has been postponed. We will notify you about the new date once it is fixed.
For more information about frozen products for FBA, go to Date- and temperature-sensitive products page.