Grave of The Fireflies, is a Studio Ghibli film about World War II, and the effect it had on the comminity in Japan. Its a great movie, I would know, since I just finished it; and no doubt will it not leave an effect on you. Heres the summary:
Taking place toward the end of World War II in Japan, Grave of the Fireflies is the poignant tale of the relationship between two orphaned children, Seita and his younger sister Setsuko. The children lose their mother in the firebombing of Kobe, and their father in service to the Imperial Japanese Navy, and as a result they are forced to try to survive amidst widespread famine and the callous indifference of their countrymen (some of whom are their own extended family members).
The movie was created from the semi-autobiographic novel by Akiyuki Nosaka, who lost his sister due to malnutrition in 1945 during the war. He blamed himself for her death and wrote the story so as to make amends to her and help him accept.
Ah, by the way, there are 9 parts to this movie. If you stick to the same person who uploaded it (ShiningDete), you should be able to view it all. ;_;