Important points
- Byakuya's Bankai is able to leave him exposed due to a hidden safe area for enemies to attack.
- Kyoraku's bankai is vulnerable to harming allies due to its area of effect. which limits its use
- Kenpachi's bankai tears his body into pieces. for enormous power Risk of harm to himself and others.
in the world of bleachBankai is the Soul Reaper's trump card, which they only use when absolutely necessary, although these special abilities tend to be incredibly powerful and often succeed in defeating their opponents. This is because these special abilities have their own unique way of working. Some of them have some major weaknesses and drawbacks that limit their overall usability.

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Because of this, some captains only use their bankai once or twice throughout the series. so as not to be revealed during battle. Considering the most glaring weaknesses that can severely limit a user's ability to fight, these Bankai have the biggest gaps in reliability.
8 Senbonzakura Kageyoshi (Byakuya Kuchiki)
Byakuya's safe space can be exposed to his enemies while in his bankai.
- First appearance: Episode 58
Zenbonsakura Kageyoshi, the most popular Bankai in the series, sees Byakuya surround his opponent in a ray of sharp petals before attacking them with an infinite number of blades. Considering the number of times Byakuya used this technique, The risk level is not as high as others. But there are still big flaws. One thing that Tsukishima reveals during the Fullbring Arc is that it is a safe space.
It turns out that Byakuya's enemies can be attacked from any direction at any time. But Byakuya was still protected because he could stand in a small safe circle. In the heart of Bankai. If the fighters were able to get so close to Byakuya that they were also in the circle. It can become a real problem for the captain because it renders the ability useless.
7 Katen Kyōkotsu Karamatsu Shinju (Kyoraku Shusui)
This area of effect on the bankai can make it vulnerable to use with surrounding comrades.
- First Appearance: TYBW Episode 35
Kyoraku's Bankai consists of four different actions. Each action involves dissecting the opponent's strength and morale bit by bit. While simultaneously cutting it into pieces, Kyoraku only unleashes his Bankai only once throughout the series. Because while it works wonders on a single target, As Ukitake said It also put Kyoraku's allies at risk.

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Kyoraku's bankai has an area of effect. This means that if an ally jumps into the same battle while he's using it, things can get ugly quickly. And it could easily lead to someone's death. After Kyoraku uses his bankai on Leal Barro, he is seriously injured from the stress affecting his body. Which is another downside to this flashy technique.
6 Ryumon Hozukimaru (Ikaku Madarame)
Bankai's slow start limits overall usage.
- First appearance: Episode 118
The moment when Ikaku unleashes his Bankai against the Arrancar is often cited by fans as one of the greatest and most exciting Bankai activation scenes in the entire show. Despite not even being captain, Ikkaku was able to achieve some truly impressive bankai. which transformed his fencing sword into two large knives. which is too big to tear into pieces Even the strongest opponent
As he admits in the foreground, Ryumon Hozukimaru is a “slow starter” as his Zanpakuto spirit begins to awaken as the battle progresses. As explained later in the series during Fake Karakura Town , Ikaku's Bankai gets weaker every time it is broken, so while it is still very strong and definitely formidable. But the amount of time it takes for a bankai to become fully effective is a time that most shinigami cannot afford in the heat of battle.
5 Sanka no Tachi (Genryūsai Yamamoto)
Yamamoto's Bankai of Destruction can only be used for a limited time.
- First Appearance: TYBW Episode 6
Zanka no Tachi, the bankai of none other than Captain Yamamoto, is one of the most destructive and powerful in Soul Society. When Yamamoto unleashes the power of his Zanpakuto, he cycles through four different stages of attack. All of which involved burning his enemies to a razor's edge and destroying them completely. But with such power comes a rather expensive price.
As Yamamoto made clear during his battle with Yhwach, using Sanka no Tachi for too long would destroy not only his enemies but also his enemies. but also destroys himself. and even the entire Soul Society. Even though Yamamoto revealed his bankai for the first time. But the air within Soul Society became heavy almost immediately. This seemed to get worse the longer the sword lasted.
4 Suzumushi Tsuishiki Enma Koroki (Kaname Tosen)
Tōsen's Bankai is instantly canceled if the opponent gets too close to his sword.
- First appearance: Episode 51
Since Tosen was only captain for a short time in the series, fans only got to see him use his bankai once. Compared to his fellow captains, not at all. Within the battle with Kenpachi There is a full explanation of how Tosen's bankai works. It can completely shut down the opponent's senses. This allows Tosen to slash at them from multiple angles without them feeling, seeing, or hearing anything at all.

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Luckily, Zaraki was able to discover one of the bankai's main weaknesses when he grabbed Tosen's sword. Completely draining his power and leaving him fully exposed. This is because Kenpachi is a fighter who likes to get up close and personal with his enemies. He was able to quickly understand this matter. Therefore, Tōsen's Bankai is probably more suitable for ranged opponents. This limits its mobility.
3 Kokujo Tengen Myo (Komamura Sajin)
Komamura will receive all damage dealt to his bankai.
- First appearance: Episode 51
This story focuses specifically on Komamura's bankai. Before he received an upgraded version later in the story, Kokujo Tengen Myo was a giant version of Komamura in every respect, meaning that it followed his movements and physical attacks exactly as he created them. However, it also meant that that This is because the two are intrinsically linked. Any damage that Kokujo Tengen Myo takes will also be applied to Komamura.
It doesn't help that this Bankai is. Even though it's fast because of its size But it is still slower compared to others. and can be easily taken advantage of if an opponent has abilities that make them too agile to see. Once again, Komamura improved this bankai in the Thousand Year Blood War arc, but it always had flaws that still made it a bit risky to use.
2 Nozarashi (Saraki Kenpachi)
Zaraki's Bankai tears apart his body to gain immense power.
- First appearance: Chapter 669
Kenpachi's immensely powerful Bankai is a last resort that is just as damaging to the user as it is to the enemy. that inflicts damage on his opponent. When releasing Nozarashi Zaraki takes on the appearance of an Oni with glowing red skin and dark patches covering his skin. He also received a shocking power boost. and much more brutal than before Even Kenpachi lost his sense of reasoning in this form.
This means that he becomes a one-man killing machine that will attack both friends and foes if his mindless gaze falls on them. Additionally, the Bankai is so powerful that it will tear Kenpachi's body. It shatters when used, causing him to become paralyzed after using it. There is always the chance that Kenpachi will cause himself or others to… Killed when using Bankai Which is why the other captains It is strongly recommended to limit its use as much as possible.
1 Hakka no Togame (Rukia Kuchiki)
One wrong move with the Ice Bankai could cost Rukia a limb or even her life.
- First Appearance: TYBW Episode 19
Rukia's Bankai, which she first used against Sternritter As Nodt during the Thousand Year Blood War, saw her freeze everything in her vicinity. Including yourself While Rukia's opponents caught in the attack will instantly dissipate, Rukia will survive, although moving her body too quickly will cause serious harm to her body. And it could even lead to death if she rushes too far.
It's also implied that Rukia is too inexperienced with using her Bankai. And even that is not a weakness in itself. But there are still risks when paired with a Bankai that require extreme care to use them correctly without getting hurt. Fortunately, Byakuya is there during the As Nodt fight to warn Rukia that Slowly loosening the Bankai is critical to safe use.