Rogue Ninja's Past

is episode 147 of the Naruto: Shippūden anime.

Synopsis
Naruto's team and the Kirigakure hunter-nin agree that Utakata will remain with Konoha ninjas until Hotaru is safe. After walking away Hotaru falls down. Naruto goes for plants and herbs. He later discovers that the pain that was hurting her was her clan's kinjutsu engraved in her back.