As a minor travelling unaccompanied, when will I need to provide required documents, such as my parent's note?

Question

I live in the United States, and this summer I'll be travelling to Japan alone. My mother and I have been researching it, and we think we know what documents I'll need to take with me (though you may give any suggestions you have); the question I have, however, is when will I need to provide these documents - as I am boarding the plane? Buying the ticket? Entering the airport? At which point do these documents get checked?

Answer 1

I think you will need to carry these documents in a wallet and have them with you at all times. You might make copies and put them in your luggage as backup. The reason is; if the luggage is lost, (as often happens) you are in a foreign country without papers. It would be difficult to secure lodging or get on another airplane.  I believe that you will need to show them when you buy your ticket, you will need an ID again prior to entering the boarding area. More? I don't know.

Have a safe and wonderful trip