Things You Can't Get Back
As both duos travel: Naruto Uzumaki and Killer B, A and Tsunade, the Kumo-nin question their Konoha counterparts about the faith that Tsunade had shown in Naruto. Recalling that she had believed in him long before the invasion of Pain because of a bet he had made to her. Remembering a time before she had met Naruto, Tsunade hurried to the next gambling den while Shizune hurried behind her, upon seeing shinobi fly overhead, Tsunade tells Shizune to let it alone. Upon arrival at the den, where Zaji and his cohorts could barely contain their excitement that the Legendary Sucker had arrived with a lot of cash. Elsewhere, the Raikage retrieves one of his wounded subordinates. Amai, while in the town spots Tsunade and reports back to the Raikage who despite Karai's protesting, decides to have the legendary medical-nin heal him. Approaching the Sannin Tsunade flatly refuses because of the bad blood between the two villages, indignant that that they would even dare to approach her in the first place. This encounter ultimately leads up to Tsunade telling the Raikage that if he could defeat her in arm wrestling, she would go with him. As the titanic competition gets under-way, A, realising that he would not win in a match of strength uses speed to win the match. After seeing the state of the patient, she asks that they tell her what had happened so that her treatment was not compromised.
Aired 01/11/2012EP 286 - Things You Can't Get Back

Naruto: Shippuden
Naruto: Shippuuden is the continuation of the original animated TV series Naruto. The story revolves around an older and slightly more matured Uzumaki Naruto and his quest to save his friend Uchiha Sasuke from the grips of the snake-like Shinobi, Orochimaru. After 2 and a half years Naruto finally returns to his village of Konoha, and sets about putting his ambitions to work, though it will not be easy, as he has amassed a few (more dangerous) enemies, in the likes of the shinobi organization; Akatsuki.
(Source: Anime News Network)