Bleach is a well known known anime throughout the world it was aired on 2004 for the first time , part of the famous shounen trio " THE BIG THREE ". BLEACH is not only famous for its storyline,  arcs , incredible character designs and amazing choreographed fighting scene but it is also famous for its unique and attractive power system of Zanpakutō , the sword each shinigami wield and the power up mainly possessed by captain level spiritual pressure called Bankai 


15. Renji Abarai



the blade of his zanpakuto turned into a giant skeletal snake that fires beams while its owner dons a baboon pelt. But the weapon's form is revealed to be an imperfect bankai as Renji later reveals his weapon's true bankai: Sōō Zabimaru




14. Tōshirō Hitsugaya



His slashes create an immense amount of spiritual power which overflows from the tip of the blade, creating a flow of ice shaped like a Chinese dragon. The dragon flies towards opponents and instantly freezes anything it touches. Hyōrinmaru can create multiple ice dragons to attack an opponent from various angles.




13. Byakuya Kuchiki



By swinging Senbonzakura's hilt, Byakuya can control the blade fragments, allowing him to shred opponents at a distance and break through almost any defense. The blades can be used for defensive purposes, as they can protect Byakuya from an incoming sword swing.




12. Yoruichi 



The former Captain of the 2nd Division, Yoruichi Shihoin is one of the strongest unarmed fighters in Bleach. she has mastery of flash step and a splendid ninja no less. She can move faster than nearly any other character in the series and can defeat most foes before they even realize she's moved. her latest powerup in the 1000 years of blood war , she can change her retsu over 100 time per sec. 




11. Kisuke Urahara 



Urahara's Bankai manifests into an enormous female figure, a goddess-like entity who shields him with her arms. Using it's core ability, which allows him to reconfigure his surroundings into whatever he wishes.






10. Oetsu Nimaiya



Oetsu Nimaiya is another member of the Royal Guard, and the creator all Zanpakutō. As such, his sword is one of the strongest in the series and is so sharp and powerful that no sheath can contain it. He’s so strong in fact that he never needs to use any of his advanced techniques over the course of the series. He is also tremendously useful in a support role, as he can repair and create Zanpakutō for other Shinigami




9. Senjumaru Shutara



Shutara is a member of the Royal Guard and therefore considered strong enough to protect the Spirit King himself. she can manipulate cloth and thread with her mind alone. This lets her create incredibly realistic illusions or attack someone through barriers by manipulating their clothes. Her abilities are unlike any others in the series, and she fights entirely without a Zanpakutō, spells, or physical techniques.





8. Tenjiro Kirinji 



Another member of the Royal Guard, Tenjiro is able to summon the water from a special hot spring whenever he wants. His healing ability is also second to none, and he can cure nearly any affliction on his own or another’s body. This water comes in two flavors, the first is offensive and quickly burns away enemies while the second stimulates a teammate’s natural healing and quickly restores their stamina.





7. Retsu Unohana 



This Bankai gives her immense strength and durability in battle. Also, it releases a very strong and potent acid, which can turn both Zaraki and her into Skeletons. For this to work, her blade or acid has to come into contact with his body.




6. Kenpachi Zaraki



Kenpachi's Bankai, Once activated, Kenpachi basically becomes a berserker-like devil with monstrous strength. He can even cut at range, which helps compensate for Kenpachi's melee restrictions, though his mindless rage reduces his ability to strategize.




5. Shunsui Kyōraku



Shunsui Kyōraku is the current captain commander of gotei13 after the death of Genryūsai Yamamoto. He is one of the strongest character in the Bleach. Shunsui uses his Bankai when he faces off with some vengeful Quincy.This release and its shadows distort the environment, transforming it into what Shunsui describes a "dark", "lonely" and "hopeless" space.





4. IchibΔ“ Hyōsube



When IchibΔ“ activates the Shikai, the tip turns into a blade that scatters black ink, erasing the names of whatever the ink stains. He refers to Bankai as Shinuchi, citing that as the original word before Bankai replaced it, and his is called Shirafude Ichimonji.





3. Sōsuke Aizen 



He has the maximum amount of spiritual pressure in entire franchise of bleach. Sosuke Aizen is the easily one of the strongest illusionists in fiction history. He is one of the very few illusionists who is capable of completely tricking an omnipotent being who can see into, interact with, and alter, different future timelines while simultaneously keeping up with said beings speed. 





2. GenryΕ«sai Yamamoto

He is the former Captain commander of gotei13 And one of the strongest character in the  Bleach anime He is also the captain of squad one and possesses an extremely high amount of Spiritual pressure. His bankai wasn't in the anime  However he used his bonkai in bleach 1000 years of war arc. 



Upon activation of his bankai, any flames previously produced by RyΕ«jin Jakka are absorbed into the blade. Zanka no Tachi incorporates the full power of Yamamoto's flames into the blade: the flames within the blade burn anything it cuts out of existence.
He can even bring over a trillion dead souls




1. Ichigo Kurosaki



Ichigo's final bankai is both his hollow second release and soul reaper bankai combined. Ichigo is pretty much a arrancar who became a soul reaper. A arrancar who is a soul reaper would have two swords. When he used bankai his second release as a hollow masked his sword instead.