"When It Turns 9 o'clock" (9時になったら, 9-Ji ni Nattara) is chapter 587 of the original Naruto manga.
Sumamry
Using this time, Sasuke questions his brother about Izanami. Itachi explains the mechanisms behind the technique, the history of their clan, their use of Izanagi and why Izanami was created. He then tells his brother that Kabuto would be freed from Izanami once he accepted his fate. Somewhat angered that Itachi would use a technique that the victim could escape, Sasuke questions his brother who tells him that he wanted to give Kabuto the opportunity to accept his fate — something he himself could not do during his lifetime. This explanation only served to irate Sasuke more who believed his brother to be perfect, but Itachi, refutes this claim. All throughout this, Kabuto continues to battle on in his mind, refusing to give up. Elsewhere on the battlefield, a grown up Urushi, tells one of his comrades about his home and hopes that by the time he got back, his brother (Kabuto) would be there. Meanwhile at the cave, Itachi prepares to end the Summoning: Impure World Reincarnation.