Transit Time (previously known as Shipping Time) is the time between when you hand the order over to your carrier and when it's delivered to the buyer's address. Transit time is part of the delivery time calculation displayed on the offer listing and checkout page:
Total Delivery Time = Handling Time + Transit Time (+ any holidays)
Note: Amazon calculates handling time and transit time in business days.
If you use Shipping Setting Automation, then Amazon manages your transit time based on your ship-from address and your carrier preferences. If you have opted to manually define your transit times, then follow these steps to modify them:
Go to Shipping Settings.
Under the Shipping Templates tab, select the shipping template that you want to edit.
Click Edit Template on the right side of the screen.
Select the Shipping option, Regions, and Rates option that you want to configure.
Modify the transit time by selecting the drop down menu under the Transit Time excluding handling time column.
Repeat for as many Shipping options and Regions as needed.
Standard shipping requires you to be able to ship to all regions of Japan except for the remote islands (Ritou). Learn more
Transit Time Requirements