Yes, you will need these documents. If you need other vaccinations, you can get them here. I'm pretty sure they are free, but I will check on that for you.
I notice there is one page to your transcript. Are you in grade nine right now? I thought, being sixteen years old, that you would be in grade eleven. It really doesn't matter--we can work all of that out when you get here.
I think you are very brave to travel alone at your age. Most teenagers would not do it, but don't worry, you will do fine. Thinking about it is a lot worse than actually doing it. Just remember, you can ask questions at any airport and they will be glad to help you. At every airport, there is a big digital sign that will have your flight number on it with the gate where you will board your next flight. You only have to do that two times--once in Japan and once in Minneapolis, USA. Sometimes, planes run late for many different reasons. If you miss a connecting flight, they will get you on the next flight out. I can check your progress on this end, so I will know if that happens and will know when you are coming in, so don't worry about that. That rarely happens, but it is always a possibility. It has happened to me only one time in my life.
The new Facebook app is causing a lot of people in the US to get upset. Many people are not downloading it. Apparently, you have to agree to let them turn on your camera and microphone without your knowledge and give them the right to use all of the pictures on your phone however they want. That type of thing does not make Americans happy. I'm not sure what I will do if they go through with that.
If you have any more questions, be sure and let me know. One week from today--we get our Thai daughter! We're excited!
James