I saw two very good Japanese movies, Like Father, Like Son and Nobody Knows. The former was sad, but the latter was heartbreaking.
Like Father, Like Son is about babies getting mixed up at a hospital when they were born, and the parents were notified about it 5 years later. I felt bad for the kids for being put in those circumstances.
Now, Nobody Knows. Ugh. This really tests your heart, and how much it could take. It's about 4 siblings who have to fend for themselves, after their mother abandons them. They are between the ages of 12 to 5. Their living conditions get worse and worse as the movie progresses. Surprising that it was 2 1/2 hours long.
I wanted to cry when the littlest one, Yuki, fell off a chair and died. What's even more morbid is her siblings didn't cry at all. They merely accepted it with straight faces. They were so engulfed in misery and helplessness, that they didn't have the emotions to care. She was so adorable too. They placed her in a suitcase and buried her at an airport, so she could see the airplanes, even though she's dead already.