Arrival in Karakura Town

Prelude
In the fake Karakura Town, when Ichigo turns to look at Aizen's fight against his father, Urahara, and Yoruichi. Gin appears behind Ichigo and remarks that Ichigo should not turn away when he's standing right next to him. He goes on to tell Ichigo that he is no longer a warrior, Shinigami, Hollow or even a human anymore. He asks Ichigo if he thinks that he can beat Aizen when his father, Urahara and Yoruichi cannot. Seeing how weak Ichigo's resolve is, he again offers to allow Ichigo to run, saying that he has lost interest in him and that Aizen will be disappointed to see him as he is. Gin finishes by saying that Ichigo 'knows' about Aizen's power. He then tells him that is all the warning he is going to give Ichigo and that he is not going to run, he will finish him off. As Gin draws his Zanpakutō, he is stopped by Aizen. Ichigo sees that Aizen has completely defeated his opponents, all three of them lying on the ground. Aizen then asks what Gin was going to do to Ichigo, he simply replies that he was testing Ichigo's strength. Aizen instructs Gin to open a Senkaimon so that they can attack the real Karakura Town in Soul Society, remarking that there is no need to destroy the Tenkai Kecchu since it will be more convenient to create the Ōken in Soul Society if they are attacking the Royal Palace. Ichigo tells him to wait, but falls silent as Aizen's body begins to shed his sleek new form as his "incubation" is complete. Gin remarks that his incubation period has ended and Aizen agrees, finding that it fortuitous that the Chrysalis period has ended as he will be able to watch the demise of Soul Society with his own eyes. Gin opens the Senkaimon and before leaving, Aizen tells Ichigo that he will leave him in the fake Karakura Town and come back for him after everything else is done. Aizen then enters the Senkaimon with Gin. .

As they travel through the Dangai Precipice World, Gin comments on the nostalgic feel of the place. Aizen agrees before they are confronted with the. Gin urges Aizen to get going but Aizen holds his ground, prompting Gin to comment that as the Kōtotsu is a being of reason and not Reiatsu, as such, nothing can be done to it with Reiatsu. However, Aizen continues to hold his ground and then destroys the Kōtotsu as it gets close. Aizen then asks Gin what he is afraid of, saying that reason is for those who cannot live without clinging to it. Aizen then invites Gin to come with him to reason's horizon. Once they arrive in Soul Society, Aizen notes that they are some distance away from where Karakura Town is. Gin asks Aizen not to make it sound as if it was his fault, blaming it squarely on Aizen's destroying the Kōtotsu. Aizen concedes that, that might be the case and apologies before inviting Gin to walk the rest of the way.

After Gin and Aizen left through the Senkaimon, Isshin manages to get back on his feet and tells Ichigo to open a Senkaimon and to get ready to defend the real Karakura Town. As his son continues to stand in shock, Isshin head butts Ichigo to get his attention, asking him if he heard what he said about going to save Karakura Town. Ichigo plainly states it is absolutely impossible and he knows it. Isshin yells at his son asking him how he knows if it is impossible or not. Ichigo responds back that they both know there is no way they can beat a monster with reiatsu like Aizen's. Isshin then realizes that Ichigo truly does understand Aizen's powerful reiatsu, unlike him and everyone else. He then tells his son to accompany him but when Ichigo doesn't move it prompts Isshin to ask if he's coming or not. He then asks what Ichigo will do instead. He yells at his son again asking if he is just going to stand there and cry about how he couldn't protect anything. Isshin tells him to think carefully about why Aizen went to Karakura Town within Soul Society. He reminds Ichigo that if he does not go, not only the people he wanted to protect, but everyone within Karakura Town will die by Aizen's hand. Ichigo's resolve returns and he asks his father to open the Senkaimon, to which Isshin responds he didn't have to tell him. As they are running through the Dangai, Isshin stops Ichigo, prompting him to ask why as he thought they were in a hurry. Isshin responds that he can't sense the Kōtotsu. Isshin explains that Shinigami technically cannot do anything to it, but apparently Aizen has. Ichigo asks him if it will be a problem and Isshin further explains that it can be if they don't do anything about it. He then states that it is convenient for now as the precipice world is cut off from time and space and since the Kōtotsu isn't there to move them out, they now have a perfect place for Isshin to teach him. When Ichigo questions him as to what he plans to teach him. Isshin responds that he plans on teaching him the "final" Getsuga Tenshō.

Arrival
While Ichigo goes about learning the "final" Getsuga Tenshō