What I think most people can understand about this song is the history- a young girl in Japan is beaten, raped mercilessly day after day, and lit on fire as punishment for trying to contact the police. What I don't think people can grasp, however, is how amazing it is that a man that was merely 5 years old when this happened can write a song so powerful. Each time he performs it, he nearly cries, and it so perfectly captures how Tokyo feels. When this girl was killed, it wasn't just another tragedy amongst many- it was an entire country's tragedy, and it was so impactful that Ruki wrote a song about it.
I don't think there is a better way to do this tragedy justice than by the pain in his voice when he sings and the words he's written.