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Katsuyu Summoned
カツユ Katsuyu
Manga Volume #19, Chapter #169
Anime Naruto Episode #95
Movie The Last: Naruto the Movie
Game Naruto: Ultimate Ninja 2
OVA Finally a clash! Jōnin vs. Genin!! Indiscriminate Grand Melee Tournament Meeting!!
Appears in Anime, Manga, Game, Movie
Voice Actors
Birthdate Astrological Sign Taurus May 9 Icon_-_Search.png
Species Slug

Katsuyu (カツユ, Katsuyu) is the personal summon of Tsunade.


Compared to Gamabunta and Manda, the summons of Jiraiya and Orochimaru respectively, Katsuyu is quiet and more subservient to its master. It addresses Tsunade with the highly respectful honourific "-sama", and, in the English versions, calls her Mistress or Milady. Katsuyu tends to also use honourifics like "-kun" and "-san" on other villagers. Sakura and Shizune show it considerable respect, addressing it as "Katsuyu-sama". In the English dub, it is referred to as "Lady Katsuyu". Katsuyu is also shown to have a playful side and a jovial friendship with Tsunade as seen in the omake at the end of Naruto: Shippūden episode 118. It tells Tsunade of the way Sakura overreacted when it fabricated a story of its difficult journey (including: the physical limitations of its slug body, falling off a rope bridge, and being attacked by villagers) in reaching Team Three during the Three Tails Arc. Tsunade comments on Sakura's naivete and they both share a chuckle at Sakura's expense.


Katsuyu is very large in stature and is easily as tall as the largest building in Konoha. It is predominantly white in colour with three blue streaks that run vertically down the middle and side of its body from its head and tapering off at its tail. Its optical tentacles have a slight tint of grey to them and it also has two sensory tentacles on either side of its mouth.


File:Sticky Acid.jpg

Offensively, Katsuyu can spit acid using its Tongue Tooth Sticky Acid technique, which is strong enough to melt through rock with ease. With its Slug Great Division, Katsuyu can divide itself into smaller slugs to evade attacks or to serve small scale functions, and is capable of quickly reforming itself if need be. The smaller slugs can attach themselves to injured people, allowing Tsunade to channel her chakra through Katsuyu in order to heal the injured person. Unlike other types of clones, Katsuyu's clones can telepathically share information with others without having to be dispelled.[3] Though it has yet to be shown, Katsuyu said it could put Tsunade's bisected form back together.[4]

Furthermore, Katsuyu's clones have been shown to be extremely resistant to high amounts of damage, as seen during Invasion of Pain Arc. Katsuyu is also able to absorb people into its body, thus protecting them from physical impacts like the large-scale Shinra Tensei using its own high durability.[5][6] A palm-sized version of Katsuyu even survived the corrosive chakra of Naruto's eight-tailed form and Nagato's Chibaku Tensei.[7] Oddly enough, though slugs are typically slow, Katsuyu's clones were fast enough to throw themselves in front of Shizune, Ino and Inoichi before the Animal Path's rhino summon even managed to hit them.[8]

Part I

Search for Tsunade Arc

File:Slug Great Division.jpg

After Tsunade healed herself from what should have been a fatal attack, all three Sannin decided to use their most powerful summons and all three succeeded at the same time. Katsuyu was summoned and when the battle begun, it was constricted by Manda, but escaped using the Slug Great Division technique.

Guy and Lee Impersonator Arc

It was summoned again in episode 161, a filler episode, to deal with Mondai and Potcha, a pair of outsiders impersonating Might Guy and Rock Lee. In this instance it had a cold, and sneezed acid, which Mondai and Potcha, along with a clueless Naruto, were forced to anticipate and assist (although it is entirely possible that it was faking the cold in order to help Tsunade make Mondai and Potcha's lives miserable and prevent them from having the time to gather any information).

Part II

Three-Tails Arc

Main article: Three-Tails Arc Fearing that Shizune's team would need further assistance to seal the Three-Tails, Tsunade sent Katsuyu to aid them. Four of its clones appeared in time to help the sealing team by giving them an extra supply of chakra. Ino and Hinata, who did not recognise Katsuyu, were initially alarmed, but Sakura explained who it was to them.

Tsuchigumo Kinjutsu Arc

Main article: Tsuchigumo Kinjutsu Arc Tsunade sent Katsuyu to tell the Eight Man Squad about the Tsuchigumo clan for the mission.

Invasion of Pain Arc

Katsuyu aiding villagers

Katsuyu aiding the villagers.

When Pain began attacking civilians all over Konohagakure, Tsunade summoned Katsuyu. She then told the giant slug to take her chakra and heal the injured all over the village. When Pain used Shinra Tensei to destroy Konoha, Katsuyu surrounded all the villagers to protect them from the blast and heal their injuries. When Naruto returned to Konoha, Tsunade ordered one of its smaller clones to stay in Naruto's pocket and keep him informed of Pain's abilities. Other Katsuyu clones informed the villagers of the situation, and helped facilitate communication between them; Shikaku asked the clone nearest to him to have the other clones find out what they could from all the ninja who had fought Pain. After Hinata Hyūga was stabbed and Naruto lost control of himself to the Nine-Tailed Demon Fox, the clones on him observed this and reported the events to all the ninja in the village. The clones on Naruto survived his transformation, and told him that he had not harmed Hinata or any of the other villagers while under the Nine-Tails' control, which greatly relieved him. After Pain's defeat, Katsuyu informed Sakura, Hinata (who had just regained consciousness) and Team Guy of Naruto's victory, and tried to tell Neji that Naruto did not want help, but Neji insisted that Katsuyu lead them to Naruto.

Shinobi World War Arc

A and Tsunade

Katsuyu accompanies Tsunade and A to confront Naruto and B.

As Tsunade leaves headquarters with A, she apparently summons Katsuyu, who divides, with part of her going with Tsunade and part staying at headquarters to more than likely be used to keep the channel of communication between them open. When Tsunade and A confront Naruto and B, Katsuyu comments on the chakra of the Nine-Tails Chakra Mode. Katsuyu later expresses relief when Killer B intercepts the Raikage's attack on Naruto.

Shikaku and Mabui analysing data

Katsuyu alongside Shikaku and Mabui at headquarters.

Meanwhile, back at headquarters, Katsuyu asks whether or not it would be best to alert the Raikage and Hokage of what was happening, but Shikaku states that he was appointed to handle things at headquarters while they tried to stop Naruto and B. When Katsuyu tries to inform him of what was happening with Tsunade and A, Shikaku asks for silence in order to concentrate of formulating a strategy to combat the disguised members of the White Zetsu Army that had infiltrated their ranks in the dead of night. Later, when Shikaku realises that the only way to expose the imposters was to use Naruto's ability to sense negative emotions that he gained through his control of the Nine-Tails, Mabui states that is impossible as the Raikage would not allow Naruto to participate in the war, Katsuyu informs them that this might not be entirely impossible due to the Raikage finally allowing Naruto and B to pass. Katsuyu later relates the information of what happened, much to Mabui's disbelief.

As Tsunade who had returned to headquarters prepares to depart for the front lines after hearing the reports of the real Madara Uchiha being revived and slaughtering the Fourth Division, Katsuyu calls out to her to stop. As Shikaku states that they should use the Flying Thunder God Technique to transport Katsuyu instead of Tsunade, Katsuyu said that would be fine since her body could withstand being ripped to shreds by Mabui's Heavenly Transfer Technique.

Katsuyu, in its entirety, is later summoned to Tsunade's side by the severely wounded Kage. Distressed about its master's condition, Katsuyu immediately states that it would put the bisected woman back together, but is cut off by Tsunade who tells the slug instead to first bring all the other Kage to her as there was still time to save them.


  • The name Katsuyu apparently comes from slug (蛞蝓) in on'yomi.
  • The first part of Katsuyu's name: Katsu (), means "split" or "divide". This could be a reference to her ability to divide into many smaller clones of herself.
  • A variation of the worldwide game "Rock, Paper, Scissors" in Japan presented in the early 1640s was the "Slug, Snake, Frog" variation. In this variation, the Frog is afraid of the Snake, the Snake is afraid of the Slug, and the Slug is afraid of the Frog. This is influenced by the Sansukumi way of thinking where it keeps the three objects in a deadlock. This concept was referenced and joked upon in an omake of episode 164 of Naruto: Shippūden, where Katsuyu feared that with Manda deceased, Gamabunta and the toads of Mount Myōboku would now try eating it.
  • Although Katsuyu is referred to as female in the subtitles of the anime and the manga, coupled with the fact that Katsuyu has a female voice in the anime, a gender specific pronoun has never been used to describe the slug ("sama" can be used for both males and females). Slugs are also hermaphrodites.


  1. Second Databook, page 68
  2. Fourth Databook, page 79
  3. Naruto chapter 438, page 11
  4. Naruto chapter 601, page 6
  5. Naruto chapter 429, page 14
  6. Naruto chapter 430, page 8
  7. Naruto chapter 441, page 5
  8. Naruto chapter 425, page 14

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