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The original article can be found on Narutopedia at Tailed Beasts.

The nine tailed beasts.

The tailed beasts (尾獣, bijū), sometimes referred to as "Chakra Monsters" (チャクラのバケモノ, Chakura no Bakemono), are the nine titanic living forms of chakra created by the Sage of Six Paths. They are differentiated by the number of tails they have, ranging from one to nine.


Long before the founding of the hidden villages, the Sage of Six Paths saved the world by sealing the Ten-Tails into his body, becoming its jinchūriki. Sometime later, the Sage was inspired by his youngest son, Asura, to use his Creation of All Things ability to divide the Ten-Tails' chakra into nine living entities, what would become the tailed beasts. The Sage named the nine and explained to them that a link existed between them despite their separation. He also foretold of a day when they would be brought together again — though not as they were — and that at that time someone would emerge to show them what true power is. After the Sage's death, the tailed beasts drifted apart, apparently due to Kurama's belief that their number of tails was an indication of their strength. The tailed beasts were originally created not only to prevent the Ten-Tails' resurrection, but also to maintain and balance peace. The first person to come close to their original usage was Hashirama Senju, who had captured several of the tailed beasts with his Wood Release, distributed the beasts amongst the new villages in order to stabilize the balance of power between them. However, Hashirama's usage of the tailed beasts were forceful rather than earning their willful cooperation. This method would be realized in Hashirama's successor as Asura's reincarnation, Naruto Uzumaki.

Over the centuries, humanity failed to recognize the tailed beasts as sapient individuals, instead seeing them only as monsters, demons, or mindless beasts worthy of fear and disdain. Because of their immense power, the tailed beasts were sought out by humans to be used as weapons in times of war. The beasts resented this treatment and came to hate humans, at times willingly becoming the monsters they were viewed as. In order to harness the beasts' power, the villages began sealing them into humans, creating their own jinchūriki.


The tailed beasts performing their signature technique.

Tailed beasts are widely believed to be bestial in nature, incapable of the intelligence needed to fully utilize their immense strength. It is thought that only when sealed within humans are they able to benefit from the knowledge of their jinchūriki to use their powers effectively. This is not actually true. However, the Ten-Tails does tend to make wanton use of its powers, not focusing its abilities towards whatever end would be most advantageous to it until sealed into a jinchūriki.

Each of the tailed beasts have their own unique abilities, but they all share the same attributes: they have massive quantities of powerful chakra - colored red - far greater than what most shinobi have, can easily transfer their chakra to whomever they choose, and can use the Tailed Beast Ball. Because the tailed beasts are pure chakra, they cannot actually be killed; if they or their jinchūriki die, their chakra will re-coalesce in time. In addition, if a large portion of a tailed beast's chakra is separated from it, that chakra becomes a separate, sentient copy of the tailed beast.

Tailed beasts can communicate telepathically with one another and their jinchūriki, and possess several levels of consciousness. In the initial level, the beast appears to be in a habitat of sorts, typically imprisoned in some way by whatever fūinjutsu was used to seal them. The second level is where all the tailed beasts can convene and communicate with one another, free of any restrictions. Jinchūriki are also able to enter this level, but in order to do so, they must be completely linked with their tailed beasts.

Related Article: Tailed Beast Skill


The jinchūriki (人柱力; Literally meaning "Power of Human Sacrifice") are humans that have Tailed Beasts sealed within them. They exhibit extraordinary powers, and in some cases are more powerful than their tailed beasts, because they have the intelligence to use the beasts' powers effectively.

The jinchūriki are typically lonely people, viewed by those around them as the tailed beasts that had been sealed within them, leading to prejudice and being hated and feared. According to Akatsuki, the first two jinchūriki they captured loathed humanity, and their villages were in fact glad to be rid of them. However, some jinchūriki refuse to waver, even though they have been shunned, and they eventually earned respect. Such examples are Naruto, Killer B, and the most prominent being Gaara.

Main article: Jinchūriki

Rules and Guidelines

Disclaimer: Please note that this is only a rough draft of rules currently agreed upon by the members of Shinobi Legends. These are open for revision and are currently being fleshed out; for now, these rules only deal with the issues as stated. In the event that other issues arise that are not covered by these rules, other means to decide the matter will be employed (e.g. consulting the bijuu council/public forum of peers).

Forum Account Clause

  • A host must have/create an SL forum account.
  • Create a thread with the name of his bijū in the title to the Bijū Arena board.
  • Use this thread for the purpose of stating their preference for battle.
  • Keep a list of challengers in this thread.
  • Indicate when your grace period will be over, if you are a new host to this bijū.
  • Post any notices of absence to this thread.
  • Challengers will also have/create an SL forum account.
  • After a host's grace period has been met, a challenger posts/issues a challenge to the host of preference as a reply to the thread of that particular beast for which they are interested in competing.
  • After arrangements have been made between the host and challenger, a post to indicate what terms have been accepted will be made to the host's thread.
  • Challengers must also post a notice of absence in the thread of the host they are currently combating.

Challenging a Host

  • You cannot challenge any host until after their 14 day grace period is over.
  • You must check forum host preference threads to stay informed.
  • You must post to the host's preference thread to make a valid challenge. Notify the host through a pm on SL that you have issued a formal challenge.
  • You and the Host have one (1) week to set up and begin the match.
  • You are bound by the activity rules too. Notify host of inactivity in pm and his preference thread or forum match if applicable. After fourteen (14) days in a notified inactivity you will bow out gracefully and may challenge this host for this bijū again after three (3) months.
  • You must post to match every seven (7) days. After seven (7) days from a non-notified inactivity, you will bow out gracefully and may challenge this host for this bijū again after three (3) months.
  • After losing a challenge, you may not challenge the same host for the same beast for three (3) months. However, you may challenge this same host for a different beast in his possession without waiting.
  • OOC matches are 1v1. Preferences can alter this upon agreement of all parties involved.
  • You may have more than one OOC match going at the same time.

Activity Clause

  • Participants must commit to activity.
  • Hosts must make an RP post in public once every fourteen (14) days while not engaged in an active challenge.
  • Hosts who do not make an RP post, while not engaged in an active challenge, once every fourteen (14) days will have their bijū stripped by the council.
  • During a match, hosts and challengers must make a post to the RP once every seven (7) days.
  • A Host or Challenger who fails to make a post to the RP match once every seven (7) days, without posting a notice of absence to the forum host thread in question, will forfeit the match. During this forfeit, the bijū will either remain with the host, in the event of challenger inactivity, or be transferred to the challenger, in the event of host inactivity.
  • Cool down periods are an optional break from back to back fighting in order to permit the host to heal and train with his beast. As such, a cool down period can only be announced after the successful conclusion of a match, and is not intended to serve as a general leave of absence. Should a host opt to take a cool down period, this may last no more than seven (7) days and must be announced with dates of duration to the host's forum thread for each beast that player may host. A cool down period from one beast a player hosts cannot be applied as a cool down period for all beasts under his control but must be bijū specific.
  • The purpose of making a notification of absence post is to permit life to happen without wrecking your participation in the bijū activity, while making it clear that there will be punishments for those who abuse this leave of absence, like forfeit of match, loss of bijū, and bans pending a review by the council.
  • Extenuating circumstances during an active match: Here the activity clause is seven (7) days, in order to keep the fight moving along to a conclusion. Posting for a leave of absence is essential to holding your slot in the match. Should this not be possible, the council will determine how to handle the situation at the time of your return upon request dependent upon a challenger waiting list, if the beast has already been transferred, or how it impacts current RP. All decisions of the council will be binding.
  • Extenuating circumstances during the 'idle phase' of a host: Most events occur so as to permit making a post at some time during your 14 days to alert the community that 'something' is going on. Your leave of absence notice will reset the clock to a fourteen (14) day absence max. Should you need more time than that, (which adds up to possibly a whole month if your notice occurs on day 14) then you will step down as a host and try again later when your life will permit participation again. You will not be banned from challenging someone for another bijū, but the SL community will be permitted to move on. The council will handle requests for concessions on a case by case basis and their decision will be binding.

Mastering a Bijū Clause

  • The beast must be completely mastered before the Jinchūriki can access Tailed Beast Mode.
  • The Bijū Bomb can only be used while in Tailed Beast Mode.
  • If a host goes over their mastery for any reason at any time during a biju match, it is considered an automatic forfeit by the host.
  • The Bijū’s passive ability can be accessed immediately upon being sealed with the beast, but the power will be weaker than someone who has mastered the beast. It takes time to master the passive abilities of a bijuu.
  • Mastery will occur in five stages consisting of 3 weeks each, with a mid rage evolution stage to access partial transformations.
    • 25% - grants access to C ranked jutsu in the beast's passive ability. The host has access to the Initial Jinchūriki Form.
    • 50% - grants access to B ranked jutsu in the beast's passive ability. The host has access to the Version 1 Cloak.
    • Partial Transformation - Although no additional access to the beast's passive ability have been acquired, control over the transformative stages now includes the finesse to perform partial transformations.
    • 75% - grants access to A ranked jutsu in the beast's passive ability. The host has access to the Version 2 Cloak.
    • 100% - grants access to S ranked jutsu in the beast's passive ability. The host has access to Tailed Beast Mode.

Bijū Summons Clause

  • Summoning Tattoo: The Summoner will be sealed with a tattoo through which they call forth the bijū for use. This tattoo counts as a bijū chakra signature which can be detected through the sames means as if the beast were sealed within a host and is subject to the same restrictions against metagaming during a hunting event.
  • Chakra Cost: Bijū cost 20% of the user's total (not current) chakra to summon, even in succession.
  • Controlling Mechanism: Bijū must be under the influence of genjutsu at all times while used as a summon. Regardless of the genjutsu's potency, it will tax 5% of the summoner's total (not current) chakra while it's actively being used as a summon, the taxation only ceasing when the bijū has been removed from the field. Techniques capable of transferring chakra from the bijū to the summoner are strictly prohibited from being used in this context. Mastery of the beast is not possible considering the hostile relationship between summoner and beast.
  • Severing the Summoner's Control: Acceptable means for attempting to sever ties between the Bijū and summoner include dismantling through means of a contract seal via touch attack or dispelling the genjutsu (cost is 20% of your chakra). For Bijū controlled by means of Rinnegan users, the chakra rods have to be extracted in addition to dispelling the controlling genjutsu. Success results in a rogue Bijū situation and will yet need to be subdued.
  • Restrictions: Summoners are restricted to one action per post, be it offensive or defensive so long as the bijū is summoned.
  • Drawbacks: Bijū utilized in this manner will always possess a hateful disposition towards their summoner, this is static. Should a chance ever arise and they gain the ability to act of their own volition, they will prioritize slaying their ex-summoner first, regardless of the presence of any other actors.
  • Death of Summoner: If the summoner dies while the bijū is unsummoned the challenger/hunter will transfer the summoning tattoo to themselves. However, if the summoner dies while the bijū is summoned then the challenger/hunter can attempt to capture and subdue it, in the event that the beast has not already been captured prior to the death of the summoner. Now, if the summoner is also a host, and dies, the hosted bijū will respawn in 7 days at the location of the host's demise: the bijū will be GM'd by someone of the council's choosing.
  • There are no prohibitions to enhancing a summons bijū.

Judging a Match

  • Both parties choose a judge and abide by their decision.
  • In the unlikely event of the gross incompetence of the judge, both parties must agree upon a new judge and this second ruling shall be the final word for good or for ill.
  • After agreeing upon a judge, if he then gives a ruling that you find to be in error, the participants can agree upon another judge to settle the issue. If a second judge is requested his word will be final. No additional replacements of the judge will be possible and the new judge will be responsible for settling disputes for the remainder of the match.
  • No unresolved issues will be tolerated, as such:
    • Compromises must be made in the event of a deadlock. Failure to come to terms after every option has been exhausted will result in stripping, challenger denied, and the bijū handled according to the Stripping Rules. Both challenger and host will be denied access to all things bijū for 3 months due to gross incompetence.
  • Council members are ineligible to be chosen as judges.
  • Attempts to commit fraud by providing a judge who is an alt (for your own match) by either party will result in a perma-ban of all things bijū.
  • Judges will acquaint themselves with the rules of all things bijū, the preference list of the host, the terms agreed upon by the participants, and commit to activity.
  • Judges may have to play crowd control in the event of a public verbal abusive fight. In the event of such an issue, the judge should make one post requesting that this behavior cease, to arrange to mediate between the parties in private, and place the match on hold. Should this warning/request be ignored, the judge should refer the matter to a site Mod/staff and not be drawn into participating in such behaviors.

Stripping a Host

  • Breaking the activity clause constitutes stripping. You may participate again once your life permits the time commitment SL requires of their hosts. No ban is issued and when to try again is up to the participant.
  • Attempting to commit fraud by providing an alt as a judge to your own match results in a perma-ban from all things bijū.
  • Breaking any of the other rules results in one warning to be issued by the council. A second violation of the same rule will result in stripping.
  • Hosts who are stripped will be on a 3 month cool down period in which they may not participate in bijū matters, but can serve on the council. During this time it is hoped they will train and refine their RP/participation in order to become a host in the future. This cool down period does not apply to breaking the activity clause.
  • Fourteen (14) days after stripping a new host must be chosen.
  • Seven (7) days after host is chosen an RP to seal must be completed. OOC sealing must be completed within two (2) days of being chosen. If the RP exceeds the 14 days, the host must default to OOC sealing and post his grace period dates immediately.
  • In the event that a host/summoner is stripped during a match, the beast goes to the current challenger.
  • In the event a host/summoner is stripped outside of a match, the beast goes to the first challenger on the host's challenge list.
  • In the event that a host/summoner is stripped, and no challenger exists, the bijū council determines how to handle the reassignment of the beast in question.
  • When the Bijuu Council is called upon to assign a new host, the Bijū Council can handle the reassigning of the bijū in any manner they agree upon. Some ways they might to choose, for example, might be: Assigning to a new host they all agree upon, Asking for volunteers, Calling for a GM to host an RP for a wild bijū hunt, Host a lottery of applicants (meeting in a paid zone and using the random die generators), or a tourney (not to exceed 2 months from start to finish). However, judging the tourney matches will default to judge rules. Council members may not serve as judges.
  • A GM RP led event must begin no later than two (2) weeks after it is called for and be concluded within 2 months of its beginning. Additionally, any SL GM staff who are trying to be hosts may not participate in aspects of a wild bijū hunt but rather must confine themselves to being a contestant.

General Information

  • There is no limit to the number of bijū one person can own.
  • Using Telescope Technique to circumvent the quest of seeking out *any* Jinchūriki is not permitted.
  • The challenger list of the former host/owner is inherited by the new host/owner of a bijū. You may still take the 14 day grace period before beginning discussions on setting up your first match even though your new bijū comes with challengers.

The Tailed Beasts

Bijū Classification Jinchūriki Summoner Affiliation
The Zero-Tailed Leech
-- Iburi Ray Iwagakure Symbol.svg
The One-Tailed Tanuki
Kamui Uchiha -- Konohagakure Symbol.svg
The Two-Tailed Cat
Jay Nara -- Uzushiogakure Symbol.svg
The Three-Tailed Giant Turtle
Kaori -- Kirigakure Symbol.svg
Son Gokū
The Four-Tailed Monkey
-- Warren Iwagakure Symbol.svg
The Five-Tailed Dolphin Horse
Yomi -- Sunagakure Symbol.svg
The Six-Tailed Slug
-- Uchiha Madara ??
The Seven-Tailed Horned Beetle
-- Harue ??
The Eight-Tailed Giant Ox
Uematsu Tomi -- Konohagakure Symbol.svg
The Nine-Tailed Demon Fox
Naruto Uzumaki -- Konohagakure Symbol.svg'
Gedō Mazō
The Empty Vessel of the Ten-Tails
-- Uchiha Madara ??
This concludes the entries for tailed beasts.