Fuinjutsu
Here I have provided a list of all the Fuinjutsu that Ryuu has learned over his lifetime.
What is 'Fuinjutsu'?
Fūinjutsu (封印術; Literally meaning "Sealing Techniques") are a type of jutsu that seal objects, living beings, chakra, along with a wide variety of other things within another object. Fūinjutsu can also be used to unseal objects either from within something or someone.
Fuinjutsu: Beast Sealing Technique
After Ryuu creates the necessary seals, the seal formula rises up in the form of multiple chakra chains and binds the target.
Fuinjutsu: Chakra Draining Seal
This is a fūinjutsu used by Ryuu to drain the remaining remnants of Orochimaru's chakra within cursed mark seals that Orochimaru has placed upon his subjects and other shinobi.
Fuinjutsu: Cloth Binding Technique
Ryuu uses a giant roll of cloth to tightly wrap up the intended opponent, completely immobilizing them, thus preventing them from moving or using any techniques. The ability itself is versatile as once completed, the addition of further seals can be placed on top of the bound victims, preventing them from even being summoned while in effect. This technique is used by Sunagakure ninja. Mere physical contact with the cloth seems to be required to use this technique. (From whom Ryuu learned this technique is currently unknown.)
Fuinjutsu: Contract Seal
When the user implements this fūinjutsu on a summoner, it removes any direct control the summoner has over a summoned creature. Close contact appears to be required for the implementation of the seal. Minato Namikaze used this technique to wrest a Sharingan-controlled Kurama from Tobi's control. Though the Contract Seal removes the summoner's ability to control its summon, it does not give the user of the fūinjutsu the ability to control the summon in turn.
Fuinjutsu: Dead Demon Consuming Seal
The Dead Demon Consuming Seal is a seal developed by the Uzumaki clan. It invokes the power of a spectral entity known as the Shinigami (死神; English TV "Reaper"; Literally meaning "death god") that can only be seen when it grasps one's soul. Once called upon, the Shinigami hovers behind the user and wraps its left arm with prayer beads, uttering some unintelligible chanting, and after some time a cursed seal appears on its arm. The soul of the summoner is then partially separated from the body and restrained by the Shinigami's hair as it thrusts its arm into the user's chest to grab the soul of its target. At the user's command, the Shinigami then performs the sealing by dragging the target's soul into the user whose stomach is branded with the seal's mark. However, the sealing is double-edged as the user's soul is devoured by the Shinigami along with the target's, both souls trapped for all eternity within the fiend's stomach.
It is also possible for the user to seal multiple targets through the use of shadow clones. The methods of sealing vary, Hiruzen needing to get close to his targets in order to perform the sealing, while Minato was able to extend the Shinigami's hand to grab Kurama.
In the two known cases where the Dead Demon Consuming Seal was used, Minato and his predecessor Hiruzen are unable to completely take their respective opponents' entire souls with them. In Minato's case, intending to seal Kurama in Naruto, he had the Shinigami devour Kurama's Yin chakra so that the weakened Tailed Beast's composition would be purely Yang. In Hiruzen's case, he was forced to take a part of Orochimaru's soul within his arms, revealing that the body parts dealt in such a manner suffer from necrosis and paralysis, causing the target extreme pain that worsens over time. Though Orochimaru undid the damage by entering a new host with working arms, he remained unable to form hand seals properly, and therefore could not use more intricate techniques such as Summoning: Impure World Reincarnation until he retrieved his arms' soul.
HOWEVER - THERE IS A WAY TO COUNTER THE SEALING
Due to the nature of the Dead Demon Consuming Seal, those whose souls are sealed away by it cannot be reincarnated. However, there is a way to break the seal. The procedure involves invoking the Shinigami using a mask from the Uzumaki Clan's Mask Storage Temple. From there, the act of the deed is potentially fatal as the summoner cuts the Shinigami's stomach to release the trapped souls. However this wound to the Shinigami is reflected on the invoker's body. The souls are then released from the Shinigami's stomach.
It is also possible for the user to seal multiple targets through the use of shadow clones. The methods of sealing vary, Hiruzen needing to get close to his targets in order to perform the sealing, while Minato was able to extend the Shinigami's hand to grab Kurama.
In the two known cases where the Dead Demon Consuming Seal was used, Minato and his predecessor Hiruzen are unable to completely take their respective opponents' entire souls with them. In Minato's case, intending to seal Kurama in Naruto, he had the Shinigami devour Kurama's Yin chakra so that the weakened Tailed Beast's composition would be purely Yang. In Hiruzen's case, he was forced to take a part of Orochimaru's soul within his arms, revealing that the body parts dealt in such a manner suffer from necrosis and paralysis, causing the target extreme pain that worsens over time. Though Orochimaru undid the damage by entering a new host with working arms, he remained unable to form hand seals properly, and therefore could not use more intricate techniques such as Summoning: Impure World Reincarnation until he retrieved his arms' soul.
HOWEVER - THERE IS A WAY TO COUNTER THE SEALING
Due to the nature of the Dead Demon Consuming Seal, those whose souls are sealed away by it cannot be reincarnated. However, there is a way to break the seal. The procedure involves invoking the Shinigami using a mask from the Uzumaki Clan's Mask Storage Temple. From there, the act of the deed is potentially fatal as the summoner cuts the Shinigami's stomach to release the trapped souls. However this wound to the Shinigami is reflected on the invoker's body. The souls are then released from the Shinigami's stomach.
Fuinjutsu: Eight Trigrams Sealing Style
The Eight Trigrams Sealing Style, consisting of two Four Symbols Seals, was used by Minato Namikaze to help Naruto Uzumaki access the chakra of Kurama, the tailed beast sealed within him.
To perform the technique, the user must first summon a ceremonial throne and place the target on it. The seal was not automatically visible on Naruto's belly, but became perceptible whenever he drew Kurama's chakra.
Whenever Naruto and Kurama conversed, it occurred within Naruto's subconscious, which was depicted as a basement of a boiler room or a sub-level of a power plant, with pipes running across the ceiling and the floor being flooded over with water. On the entrance gate of Kurama's cage, there was a parchment of paper that said "seal" (封), which covered the lock that kept the fox in. Minato also sealed his and Kushina's remaining chakra into Naruto with this seal. Minato appeared in Naruto's subconscious when Naruto transformed into his eight-tailed form, and restored the seal to its original strength, but he could only do it once. Kushina also appeared and assisted Naruto when he later fought Kurama to control its chakra.
Although the seal itself was seemingly destroyed during Naruto and Kurama's fight, it evolved into a new, stronger seal that consisted of massive torii that was capable of imprisoning the fox with ease after Naruto separated it from its chakra and merged with his own. The new seal's gate has the same lock as its previous one.
Key
Because the seal itself would naturally weaken over time, Minato, before his death, created the key, on the abdomen of the scroll toad Gerotora, that can either strengthen or completely remove the seal. He gave it to Jiraiya for safekeeping, with an intention to give it to Naruto by the time he would need Kurama's power to fight against Tobi.
To perform the technique, the user must first summon a ceremonial throne and place the target on it. The seal was not automatically visible on Naruto's belly, but became perceptible whenever he drew Kurama's chakra.
Whenever Naruto and Kurama conversed, it occurred within Naruto's subconscious, which was depicted as a basement of a boiler room or a sub-level of a power plant, with pipes running across the ceiling and the floor being flooded over with water. On the entrance gate of Kurama's cage, there was a parchment of paper that said "seal" (封), which covered the lock that kept the fox in. Minato also sealed his and Kushina's remaining chakra into Naruto with this seal. Minato appeared in Naruto's subconscious when Naruto transformed into his eight-tailed form, and restored the seal to its original strength, but he could only do it once. Kushina also appeared and assisted Naruto when he later fought Kurama to control its chakra.
Although the seal itself was seemingly destroyed during Naruto and Kurama's fight, it evolved into a new, stronger seal that consisted of massive torii that was capable of imprisoning the fox with ease after Naruto separated it from its chakra and merged with his own. The new seal's gate has the same lock as its previous one.
Key
Because the seal itself would naturally weaken over time, Minato, before his death, created the key, on the abdomen of the scroll toad Gerotora, that can either strengthen or completely remove the seal. He gave it to Jiraiya for safekeeping, with an intention to give it to Naruto by the time he would need Kurama's power to fight against Tobi.
Fuinjutsu: Evil Sealing Method
This technique is used to suppress technique-induced marks on a person. Marks of weaker power can be completely suppressed by this technique alone, but for marks of higher power, like Sasuke Uchiha's Cursed Seal of Heaven, it will cause the seal's power to become dependent on the recipient's own willpower to some extent, especially if the sealer is not experienced enough to strengthen the seal with his own power. It is also capable of holding back certain kekkei genkai, such as that of the Kurama clan as seen when Kurenai tried to do this.
This seal requires a high number of hand seals to be performed and consumes large amount of chakra from the user. Preparation for this technique requires two concentric circles with kunai placed in intervals along the circumference, in addition to a number of characters written in blood that radiate out from the centre of the cursed seal.
According to Kakashi, this technique is quick, but painful. The seal can be removed at any time by the caster or whoever the seal is on, as demonstrated during Sasuke's battle with Naruto in the Valley of the End. Since this seal relies on the will of the individual on whom it is placed, the affected may be able to will it away without an unsealing technique.
When Orochimaru was extracted from Sasuke through Itachi's Sword of Totsuka, not only was the Cursed Seal of Heaven removed, but also the Evil Sealing Method around it.
This seal requires a high number of hand seals to be performed and consumes large amount of chakra from the user. Preparation for this technique requires two concentric circles with kunai placed in intervals along the circumference, in addition to a number of characters written in blood that radiate out from the centre of the cursed seal.
According to Kakashi, this technique is quick, but painful. The seal can be removed at any time by the caster or whoever the seal is on, as demonstrated during Sasuke's battle with Naruto in the Valley of the End. Since this seal relies on the will of the individual on whom it is placed, the affected may be able to will it away without an unsealing technique.
When Orochimaru was extracted from Sasuke through Itachi's Sword of Totsuka, not only was the Cursed Seal of Heaven removed, but also the Evil Sealing Method around it.
Fuinjutsu: Finger Carving Seal
Ryuu concentrates chakra into his finger and using the heat from that, can apply writing of whatever he wants to a surface. This technique however requires them to be very delicate with their chakra control. This technique causes slight discomfort for a living target and if it is on flesh, it will scar.
Fuinjutsu: Fire Sealing Method
A kind of fūinjutsu that involves sealing a technique's effects within a specific location. As it is tailored for fire release ninjutsu, it requires a caster well-versed in the exacting art of "Sealing Formulas", as well as in ninjutsu. The jutsu-sealing space in the scroll is left blank, for the formula to be inscribed in with a brush. After performing the needed hand seals, chakra-like vapour appears from the scroll, and envelops the flames. They are sucked in towards the scroll, and the appearance of the kanji for seal (封) certifies the technique's completion. Once the sealing is performed, the technique's effects cannot be released anew as long as an unsealing technique is not applied. It is an effective technique to circumvent any secondary damage a dangerous enemy technique might cause. It is even capable of sealing the black flames of Amaterasu.
Fuinjutsu: Five Elements Seal
Five Element Seal is a technique which produces a powerful seal that is used to block or disturb the flow of chakra in a target.
Usage
Once the seal is completed, the target will become unconscious and unable to fight for a short time. Orochimaru performed this technique to tamper with Naruto Uzumaki's seal. The original seal allowed a small amount of the Nine-Tails' chakra to always mix into Naruto's, but the additional seal disturbs this, preventing Naruto from using the Nine-Tails' chakra or even controlling his own chakra properly. This is because an odd-numbered seal creates an imbalance when placed on top of an even-numbered seal. When Orochimaru later notices that the seal has been removed, he remarks that there are very few ninja capable of doing so, like Jiraiya.
Usage
Once the seal is completed, the target will become unconscious and unable to fight for a short time. Orochimaru performed this technique to tamper with Naruto Uzumaki's seal. The original seal allowed a small amount of the Nine-Tails' chakra to always mix into Naruto's, but the additional seal disturbs this, preventing Naruto from using the Nine-Tails' chakra or even controlling his own chakra properly. This is because an odd-numbered seal creates an imbalance when placed on top of an even-numbered seal. When Orochimaru later notices that the seal has been removed, he remarks that there are very few ninja capable of doing so, like Jiraiya.
Fuinjutsu: Five Elements Unseal
Five Element Unseal is a counterpart technique of Five Element Seal.
Usage
This technique can be used to remove fūinjutsu of up to equal power, like its counterpart. In the anime, Orochimaru stated that the Sannin, and Hiruzen Sarutobi, could also perform this technique. Also in the anime, while used by Orochimaru it appears to be strong enough to break the Iron Armour Seal.
Usage
This technique can be used to remove fūinjutsu of up to equal power, like its counterpart. In the anime, Orochimaru stated that the Sannin, and Hiruzen Sarutobi, could also perform this technique. Also in the anime, while used by Orochimaru it appears to be strong enough to break the Iron Armour Seal.
Fuinjutsu: Fuinjutsu Trap
Once the technique is activated, the target is sealed into a different dimensional space, within the location of the seal. Before noting that there existed few ways to escape the seal, Kakashi tried to break the seal with his Lightning Cutter, but to no avail. The only means of escape seemed to be by creating the appropriate blood seal.
Fuinjutsu: Generic Sealing Technique
This technique is a standard ninjutsu which allows a shinobi to summon an assortment of items that have been stored using fūinjutsu. Scrolls are the most common choice for item storage. When needed, the owner will activate the seals releasing their item or weapon of choice. Scrolls can also be used as ammunition for other weapons or have other seals inside of them, which expands the number of potential tricks a shinobi can use.
Weapons are the most commonly sealed objects. Tenten, a weapons specialist from Konohagakure for example, uses this technique to store her many weapons, making them easier to carry around with her. Toroi of Kumogakure also used this technique to store his shuriken which he used in battle. Puppet masters also use this technique with their puppets either through hidden scrolls in various compartments or a simple seal as a means of increasing their own killing potential as well as hiding useful weapons from the opponent's sight. This can be seen with Sasori's Thousand Hands Manipulation Force.
A wide variety of other things can also be stored in scrolls, to be released when the scroll is opened or under a specific condition. In the manga, this is done with the Water Prison Technique by Kisame Hoshigaki. Along with a medium for his sharks, it was used effectively as a trap, immobilising the persons that tried to read the scroll. In the anime, this is seen when Shikamaru summoned a large amount of water, and with Tenten's Exploding Dragon Strike technique.
Weapons are the most commonly sealed objects. Tenten, a weapons specialist from Konohagakure for example, uses this technique to store her many weapons, making them easier to carry around with her. Toroi of Kumogakure also used this technique to store his shuriken which he used in battle. Puppet masters also use this technique with their puppets either through hidden scrolls in various compartments or a simple seal as a means of increasing their own killing potential as well as hiding useful weapons from the opponent's sight. This can be seen with Sasori's Thousand Hands Manipulation Force.
A wide variety of other things can also be stored in scrolls, to be released when the scroll is opened or under a specific condition. In the manga, this is done with the Water Prison Technique by Kisame Hoshigaki. Along with a medium for his sharks, it was used effectively as a trap, immobilising the persons that tried to read the scroll. In the anime, this is seen when Shikamaru summoned a large amount of water, and with Tenten's Exploding Dragon Strike technique.
Fuinjutsu: Iron Armor Seal
Iron Armour Seal is the fūinjutsu used by Kumogakure to seal Gyūki into its respective hosts.
Usage
The seal itself takes the form of the kanji for "iron" (鉄, tetsu) and is usually printed somewhere on the jinchūriki's body: Killer B's right shoulder, and Fukai's chest. Not much else is known about the seal, besides the fact that it was stated by B to be of lower-quality and weaker than the Four Symbols Seal, which was used to seal Kurama inside of Naruto Uzumaki.
Usage
The seal itself takes the form of the kanji for "iron" (鉄, tetsu) and is usually printed somewhere on the jinchūriki's body: Killer B's right shoulder, and Fukai's chest. Not much else is known about the seal, besides the fact that it was stated by B to be of lower-quality and weaker than the Four Symbols Seal, which was used to seal Kurama inside of Naruto Uzumaki.