Grave of the Fireflies (1988) is one of the most tragic, yet best films I have ever seen. It follows 14-year-old Seita and his 4-year-old sister Setsuko. It takes place in Kobe, Japan, during the final months of World War 2. After an American firebomb attack on Kobe, Seita and Setsuko are separated from their mother, who then dies. Seita and Setsuko, now orphaned, try to survive the harsh times. It has the perfect representation of childhood innocence, expression, and symbolism. Even the camera angles themselves work well because they focus on the innocence and survival of the people of the town, not focused on the planes or other war things. The film was made by Studio Ghibli, which is surprising because they usually make happy films. 

Fun Fact! This movie was based on a true story. The director (Akiyuki Nosaka) made this story inspired by his own experience. He tried to write the story with himself as Seita, but a version of him where he was a better brother to his sister because she died from malnutrition in real life. The fireflies in the movie represent the short-lived happiness and innocence. So the overall review is that it is very tragic. It takes place in Japan during WW2. The main characters are Seita and Setsuko. It was made by Studio Ghibli in 1988. It is unfortunately based on a true story. It is not currently age-rated, but I would suggest it for ages 10 and over. You can watch it on Netflix, rent it, or watch it on DVD. Once again, beware: it is absolutely tragic, so if you are very emotional, I probably won’t recommend it.