The Shibuya River is an area where the Composer supposedly resides. The first time this comes into the plot is in Week Two, when Joshua brings Neku along in his search for it. However, there is a strong wall that prevents them from proceeding further. Later, Beat and Neku discover that the seal has been broken, apparently by Taboo Noise. This leads them to investigate, where they find Shiki and defeat the final boss.