http://en.wikipedia.org/wiki/Toilet_no_Kamisama
The song is a ballad, beginning with a simple guitar-based arrangement, however later expanding to a band and orchestra arrangement. The song's lyrics are an extended narrative that tell the story of Uemura and her grandmother. When she was a 3rd grader (8 years old), she lived at her grandmother's house next door to her parents, playing gomoku, eating nanban-style duck noodle soup when they went out shopping, watching videotapes of the comedy program Yoshimoto Shinkigeki and helping her every day. Uemura was not very fond of cleaning toilets, so her grandmother told her that a beautiful goddess lives in the toilet, if she cleaned it every day, this goddess would make her into a beautiful woman. As Uemura grew older, the communication gap between her and her grandmother worsened and the two grew apart. Uemura, feeling resentful, moved away from home with her then boyfriend and rarely came home to visit. Her grandmother later became more ill and was hospitalized two years after Uemura left for Tokyo. Uemura visited her, saying "Grandma, I'm home!" as she used to when she was little, before the two began to fight. Her grandmother could not say much, but made the effort to tell her to go away, and the next morning died in her sleep. Uemura believe she was waiting for her, and feels regret for hurting her grandmother, saying thank you to her at the end of the song