It took me exactly 11 days to receive parcel posted from Virginia. I live in Gunma Prefecture.
The USPS will not estimate such delivery time; they state that delivery times "Vary" for First Class Mail.
3
USPS first class mail international 2-3 Weeks
First class mail is delivered in 3 to 5 days
127 hours
14 days
First class mail is delivered in 3 to 5 days
First Class Mail is delivered in three to five days.
Between 3 to 4 weeks.
Max. one week
one second
10 days