Karakura Town

Karakura Town is a town or city in Western Tokyo where the story of Bleach begins, also the home town of the main character.It seems to be a small city with an average population. It resembles the real world on the surface, and the everyday humans in Bleach are unaware of the ghosts and spiritual forces with which the plot concerns itself. Sōsuke Aizen seeks to destroy Karakura town to make a copy of the Royal Key.

Bount arc
The entire Bount arc took place here, specifically from episode 64 to 91. The events that took place here was the mod soul training, this is where Ririn, Cloud and Nova are introduced into the series, Jin Kariya and the Bount's are Introduced aswel as His aims to consume living spirits and gain massive amounts of power. As the series progressed, however, he reveals that his plans are to invade Soul Society along with the remaining Bounts. However, they are defeated by the Soul Reapers with Kariya being killed by Ichigo Kurosaki. The bitto came and the lietenants were sent here. It concluded when Uryu got his quincy powers back and opened the portal to the Soul Society.

Fake Karakura Town arc
Knowing that Aizen and The Espada were planning to destroy Karakura Town to create the king's key, Mayuri Kurotsuchi and the 12th Division constructed a perfect replica of Karakura in a remote corner of Soul Society and switched it with the real one after putting all the people of the town into a deep sleep.

To hold the fake Karakura inside of the real world, four towers were put in place, these towers are soon targeted by Barragan Luisenbarn and four of his Fracción. Yumichika Ayasegawa, Izuru Kira, Shuhei Hisagi and Ikkaku Madarame are sent to defend those towers. While the first three towers are successfully defended, Ikkaku is defeated by the arrancar Pō because he refused to release his Bankai and fight at his full strength and one of the towers falls. Before Karakura begins to partially reappear in the real world, Sajin Komamura and Tetsuzaemon Iba arrive and Komamura kills Pō while Tetsuzaemon uses some type of rods to keep Fake Karakura from disappearing.

The battle against Aizen and the top three Espada is still being waged over the Fake Karakura. Soifon and Omaeda have been confronted by Barragan after killing the last of his Fracción while Kyōraku and Hitsugaya face off against Stark] and Halibel. Jūshirō Ukitake of the 13th division is currently battling Lilinette, the only living Fracción on the battlefield at the time.