[ Studying Abroad ] Open Question : Questions about being an exchange student in Japan.?

If you don't have any experience in being an exchange student please don't answer. No I don't want to go because of anime and manga and all those stereotypical things about JP. I do like the culture and one of my best friends goes there all the time over the summer. Anyway I want to go during the school year and most likely I'll be going for a whole year. I need to know whether or not I will get my high school diploma in the US if I go my Junior or Senior year. I will still talk to my school about though. Also I'm a bit afraid of the schools since they have such high expectations. My school does too but not like they do in JP. I normally have a 3.2-3.4 GPA and want to know if that would be normal there.

Source: http://answers.yahoo.com/question/index?qid=20110622125925AADqlnY

Charlie Sheen Lindsay Lohan Natalie Portman