The Five Kage Assemble

is episode 323 of the Naruto: Shippūden anime.

Summary
Ōnoki decides to tackle both Madara and Mū with the assistance of the remaining Fourth Division. Tsunade and A decide to head to Madara's location through Mabui's Heavenly Transfer Technique, a technique that only transports objects as transporting a living being will surely rip them apart. However, Tsunade decides to take the gamble using her Yin Seal: Release. Shikaku telepathically communicates to Genma to have him, Raidō and Iwashi to perform the Flying Thunder God Technique to transport Mei to Madara's location as well after Chōjūrō defeats Black Zetsu with a single slash. The other three Kage arrive at the battlefield and prepare to fight both Madara and Mū. As Tsunade heals Gaara and Ōnoki, A and Mei engage Madara, Dodai, along with the Hokage Guard Platoon chase after the Kabuto-controlled Mū. Madara attacks them with Yasaka Magatama but the attack fails because of Gaara's Shield of Sand and Ōnoki's rock golem protects them. While Gaara keeps Madara busy, Ōnoki joins the Kage and develops a new strategy. Employing Mei's Hiding in Mist Technique to obscure Madara's field of vision, he first lightens A, increasing his speed. Seeing this, Kabuto positions Mū in front of Madara but he is knocked away easily. Ōnoki then increases A's weight and subsequent attack, breaking into Madara's Susanoo and sending him flying away. Naruto insists on helping fight Madara but Tsunade tells him to leave Madara to them while he fights the "other Madara". As the clone disperses, they leave him with one word: "win". Having received the message from the Kage, the real Naruto and Killer B head to face the imposter Madara. Naruto then confronts Tobi by headbutting him, in an attempt to break his mask.