Below is a list of people who've died and a reasoning of their death:

3rd Hokage (Sarutobi)

• · Killed by: Himself
• · Reasoning: Sarutobi used a forbidden jutsu in an effort to kill Orochimaru. When the jutsu was completed his body was sacrificed to the God of Death.

• · Killed by: Himself
• · Reasoning: Yondaime used a forbidden jutsu to seal the powers of the Kyuubi into Naruto. When this jutsu was finished his body was sacrificed to the God of Death.

• · Killed by: Orochimaru
• · Reasoning: Orochimaru assassinated Gaara's father so he could attend the Chunnin Exam disguised as the Kazekage.

• · Killed by: Hidan
• · Reasoning: Asuma was caught in Hidan's jutsu, a technique which, through the victims blood, forms a physical connection between the two ninja. While this technique was active, Hidan was able to stab and burn himself and the damage was transferred to Asuma.

• · Killed by: Self
• · Reasoning: Chiyo uses a special Jutsu to revive Gaara after he his killed by the Akatsuki group. However, she had to give up her own life in exchange.

• · Killed by: Falling building
• · Reasoning: After being twisted and mutilated by Orochimaru's experiments, he was left to defend one of Orochimaru's hide outs. There he battled Naruto, Sakura, Jiraiya and Sasame and during the fight he regained his right mind and allowed himself to be crushed to death when the building collapsed during the fight.

• · Killed by: Gaara
• · Reasoning: He attempted to kill Gaara during the Chuunin exam. He failed and as a result was killed by Gaara.

• · Killed by: Akatsuki (Note: Gaara was later brought back to life by Chiyo)
• · Reasoning: Gaara was killed as the result of an Akatsuki Jutsu to extract the spirit of Shukaku from Gaara's body.

• · Killed by: Birthgiving
• · Reasoning: When giving birth to Gaara, the spirit within Gaara was too strong and it killed her.

• · Killed by: Zabuza
• · Reasoning: Gatou betrayed Zabuza. Despite the fact that Zabuza was badly punctured from spears and other weapons, he was still able to kill Gatou with a knife he held by his jaws.

• · Killed by: Zabuza
• · Reasoning: As Zabuza made his way towards Gatou, an army of men was in front of him. Zabuza charged forward and killed all of them.

• · Killed by: Baki
• · Reasoning: Gekkou found out about the secret plans plotted against Konoha while Kabuto and Baki were discussing it. Baki killed Gekkou after he failed his jutsu.

• · Killed by: Kakashi
• · Reasoning: Kakashi set up his Chidori in an attempt to kill Zabuza. Haku jumped in the way and was killed.

• · Killed By: Team Kakashi and Team Gai
• · Reason: Itachi and Kisame used these two henchman to act through using their astral projection and when the two teams killed them found out they were just fakes.

• · Killed By: Shikamaru
• · Reason: Shikamaru cut his head off and buried him alive.

• · Killed by: Sacrifice
• · Reasoning: Hizashi chose to sacrifice himself in the place of his brother.

• · Killed by: Kyuubi
• · Reasoning: Kyuubi attacked the village and Iruka's parents were killed during the havoc.

• · Killed by: Chouji
• · Reasoning: Jiroubu was out to stop Chouji from getting to Sasuke. Chouji ate his pills and tripled his strength to kill Jiroubu.

• · Killed by: Gaara/Disease
• · Reasoning: Even though his body was under attack from a fatal disease, Kimimaro went to ensure Sasuke's safe delivery to Orochimaru. During Kimimaro's fight with Rock Lee, Gaara came and fought Kimimaro until he could no longer resist the disease and died.

• · Killed by: Gotah
• · Reasoning: Kaiza was killed as an example of what Gotah would do.

• · Killed by: Naruto/Kakashi
• · Reasoning: Naruto used the Fuuton Rasen Shuriken to injure him, and he was finished off by Kakashi.

• · Killed by: Self
• · Reasoning: After being defeated by Naruto's Rasengan and seeing his partner Ranmaru living happy without him, he gave himself a "funeral" in a massive blast of his own lightning.

• · Killed by: Neji
• · Reasoning: Kidomaru was trying to hinder Neji from getting to Sasuke. Neji hit Kidomaru with his tenketsu right in the face and killed him.

• · Killed by: Orochimaru
• · Reasoning: Kin was used by Orochimaru as a sacrifice in order to perform a justu.

• · Killed by: Kakko
• · Reasoning: Obito sacrificed himself to save Kakashi and was crushed by a giant rock. Before he died, he offered Kakashi his Sharingan.

• · Killed by: Sasuke
• · Reasoning: Sasuke killed Orochimaru after his soul was taken over.

• · Killed by: Naruto
• · Reasoning: He was hired by the Wagarashi Clan to help aid their runner in the Todoroki Shrine Race. During the race, Aoi encountered Idate along with Sakura, Sasuke, and Naruto. In the ensuing battle Aoi was sent off the cliff and fell to his death into the water after being hit by Naruto's Rasengan.

• · Killed by: Kankuro
• · Reasoning: They were trying to stop Kiba from retrieving Sasuke. Kankuro came to help Kiba and killed both of them using his puppets Karasu and Kuroari.

• · Killed by: Chiyo-baa-sama
• · Reasoning: Sasori tried to stop Chiyo and Sakura as they attempted to rescue the kidnapped Gaara and ended up being stabbed to death by two of Chiyo's puppets.

• · Killed by: Temari
• · Reasoning: She was trying to stop Shikamaru from retrieving Sasuke. Temari came to Shikamaru's aid and killed Tayuya with her summon Kamatari and her Kamaitachi no Jutsu (Cutting Whirlwind Jutsu).

• · Killed by: Itachi
• · Reasoning: Itachi wanted to test out his strength and he killed all the members except Sasuke.

• · Killed by: Gaara
• · Reasoning: Yashamaru was Gaara's caretaker. He tried to murder Gaara and hidden exploding tags on him killed him when Gaara retaliated..

• · Killed by: Itachi
• · Reasoning: Yuura was killed after being used in Itachi's clone jutsu.

• · Killed by: Orochimaru
• · Reasoning: Zaku was used by Orochimaru as a sacrifice in order to perform a justu