Welcome Leandro , sounds like you are a very lucky young man to be going to Japan. There are a lot of posts here that answer questions about traveling to Japan and things you will need to know. If you can learn some Japanese before you go , it will make your time there more fun. If you have any questions , people here are very helpful with things to make your trip better. It will be an amazing time for you , be sure to bring a camera and make notes about your trip. It has been 45 years since I was last in Japan , and I still have great memories.