Amazon sets default transit times for sellers who ship from a country outside the home store.
The chart below shows the default transit times to Japan by shipping region:
|Ships from location||Default transit time|
|United States, United Kingdom, Germany, Italy, France, Spain||6-10 days|
|Hong Kong, Taiwan||9-15 days|
|Rest of world||7-14 days|
For more information, visit setting faster transit times.