Shunsui Kyōraku

is the captain of the 1st Division and Captain-Commander of the Gotei 13. His lieutenants are his niece, Nanao Ise and Genshirō Okikiba. He is the former captain of the 8th Division.

Appearance
Shunsui Kyōraku is a tall, light-skinned Shinigami with high cheekbones, grey eyes and long wavy brown hair. His hair is tied in a long ponytail and has long bangs that frame the left side of his face. He also has a noticeable amount of body hair on his chest, feet, and arms. He wears a Sugegasa straw hat and a pink, flowered lady's kimono, which he drapes across his shoulders and over his captain's uniform. Although his haori and obi sash are cheap, his pin-wheel hairpins are very expensive. He does not wear tabi with his sandals. He has thin facial hair around his mouth and on his cheeks. Over a hundred years before Sōsuke Aizen's defection, Shunsui only had facial hair on his upper mouth. After the battle with the Wandenreich, Shunsui wears an eyepatch over his right eye that was damaged during the conflict. The top half of his right ear is sliced off at a slight tilt with a scar along his right temple.

As a child, Shunsui had shorter and messier hair. He wore a flower patterned kimono.

Personality
Shunsui is a laid-back and flamboyant man, evident in his style of dress and general attitude, and is usually smiling. In his off time, he often drinks sake in bars and naps. He likes steamed buns that go with sake, but dislikes powdered green tea. Other times, he likes to chase after women; particularly his lieutenant, Nanao Ise, whom he calls "my Nanao-chan" (Lil' Nanao in the English Dub) and his former lieutenant, Lisa Yadōmaru. Shunsui tends to use a more casual speech style than many other captains. He generally refers to his fellow captains and Shinigami by their first name followed by an honorific. He wrote a romance novel titled "Rose-colored Path", which runs in Seireitei Communication, but is very unpopular. Shunsui does not receive a single fan letter or gift for his birthday from his readers, but he is not bothered by this at all.

Shunsui is a peace-loving man who will always try to talk his way out of battles, though he does not wish to insult opponents by refusing to fight. He has a great distaste for fighting, telling Love Aikawa that "it doesn't matter whether you owe someone or they owe you; as soon as you start fighting, you are in the wrong either way." The slightly eccentric Shunsui also seems to like making an impression on opponents. Though Shunsui tries to talk his way out of a fight, he will fight when the situation demands it, such as in his battle with Coyote Starrk. When Starrk asked that they only pretend to fight, he declined the offer, though noted that he prefers to do the same. Shunsui maintains a level of honor and integrity when engaging in battle. He refuses to fight with children or even in the presence of a child. He also dislikes taking the life of innocent people, as he left Chad alive when Nanao offered to kill him. He always maintains a veil of respect for his opponent, is polite in combat situations and prefers to fight one on one. When fighting powerful opponents, like Starrk or Aizen, Shunsui rarely loses his cool, going as far as to make small talk and joke around with his opponents.

Despite being one of the strongest and oldest captains, Shunsui retains a level of humility and is not overly arrogant about his strength, acknowledging that Tōshirō Hitsugaya has the potential to become stronger than himself given enough time.

However, Shunsui also harbors a deep sense of guilt over the misfortune that has afflicted those close to him, such as the death of his brother and the execution of Nanao's mother, and considers it a burden too heavy for him to carry alone.

History
Shunsui is the second son of the high-ranking noble Kyōraku family. While Shunsui was still a young boy, his older brother married the woman who would eventually become Nanao Ise's mother. Though Shunsui and his brother did not really get along, living with his brother became more comfortable, and Shunsui would visit him often. At one point, Shunsui found his brother receiving a hairpin from Nanao's mother and noted that he has mellowed out in his old age, only to be informed that this was the kindness of Nanao's mother at work. After his brother died, during which he was entrusted with hairpins that formerly belonged to Nanao's mother, Shunsui was entrusted with the Zanpakutō of the Ise family by his brother's widow, and his Zanpakutō Spirit created a second spirit to store it. Shunsui was assured by Nanao's mother that he would not suffer from carrying Shinken Hakkyōken and that he was the only one outside of her own family whom she could trust.

Despite being of such old and prestigious lineage, he disliked studying and training, and preferred to chase the ladies, although being told by Captain-Commander Yamamoto that he was able to see the truth and was wise for his age. Because of this, he was sent against his will to the Shin'ō Reijutsu Academy (Shinigami Academy). At some point in Shunsui's Academy days, Shunsui trespassed into Yamamoto's room. After being chastised by Yamamoto, he asked about the painting in his room, and Yamamoto replies that it was a monster that caused strife when it was around. While there, he came to know Jūshirō Ukitake, who would become his best friend and fellow captain. He, along with Jūshirō Ukitake, was one of the first Shinigami to become a captain through the Shinigami Academy. Furthermore, he was personally trained by Yamamoto. He and Ukitake are the oldest captains among the Gotei 13, with the exception of Retsu Unohana and Yamamoto himself. It was stated that the four of them have been captains of the Gotei 13 for at least 100 years, as of 110 years before the current time.

At some point during his academy days, Shunsui was informed by Ukitake that Nanao's mother had been executed for losing one of the cared treasures, which prompted him to admit that he preferred to learn of such things sooner rather than later.

110 years ago he had a unique relationship with his Lieutenant Lisa Yadōmaru: in contrast to his relationship with his current Lieutenant Nanao Ise, Lisa was more outgoing and perverted in a way much like his own personality, but he found that his position required him to be the "adult" in the situation. He was also the first to casually mention, to a curious Lieutenant Sōsuke Aizen, that the previous 12th Division captain was promoted to the Royal Guard. He was also present at the promotion ceremony of the newly appointed 12th Division Captain Kisuke Urahara.

9 years later, Shunsui was present at an emergency meeting called by Captain-Commander Yamamoto. He decided to create an investigative team to locate the missing 9th Division squad members. When he gave out the orders, Yamamoto ordered Shunsui to guard the Seireitei. When Yamamoto decided to send both Kidō Captain Tessai Tsukabishi and Kidō Lieutenant Hachigen Ushōda of the Kidō Corps, Shunsui instead advised him to send only Hachi and replaced Tessai with his own lieutenant, Lisa. He tried to cheer up a shaken Kisuke Urahara, telling him not to worry about his lieutenant, Hiyori Sarugaki, who was sent to help the 9th Division, because she was strong, though not as strong as Lisa.

During his time on guard, he met up with some squad members that were also on guard and congratulated them for keeping watch on the Seireitei. He also noticed Lieutenant Sōsuke Aizen taking a night walk, muttering to himself that he was maybe over-thinking things before leaving. Later in his barracks he was addressed by a very young Nanao Ise, who had come to see his lieutenant, Lisa Yadōmaru. Shunsui then remembered that Nanao always came to him around the first of every month to have Lisa read to her. Nanao confirmed this, only to be told that Lisa was away on a mission, but would be back soon. Soon afterward, Shunsui changed his attire by removing his hairpins and switching his kimono. He was present to greet newly-inducted members of the 8th Division, whom he informed that he was cordial toward young ladies and indifferent toward men.

Some time after the Hollowfication Incident, Shunsui was present when Isshin Shiba made his report concerning the mysterious Hollow he fought, along with the string of events caused by the creature in Naruki City. He laughed at Mayuri's irritation that the 10th Division captain hadn't at least brought back the Hollow's body for him to study.

Bount arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

Arrancar arc
Kyōraku attends a meeting alongside the other Gotei 13 captains when Yamamoto calls an emergency meeting.

New Captain Shūsuke Amagai arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

Zanpakutō Unknown Tales arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

Beast Swords arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

Gotei 13 Invading Army arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

The Lost Substitute Shinigami arc
Shunsui is among the captains that greet Ichigo outside the First Division meeting room and is present during Ichigo's request to reclaim the body of Kūgo Ginjō. Later, Shunsui visits Ukitake, telling him that Ichigo had come to Soul Society. Ukitake asks about his Combat Badge and Shunsui replies that he took it with him. He states that he asked Ichigo, but that he apparently trusts them, commenting that he has grown up. Ukitake states that they had failed to realize this.

Powers & Abilities


Master Swordsman: While hating the concept of having to engage in a fight, Shunsui is one of the most proficient swordsmen in all of Soul Society. He is a highly adaptable combatant, as his two swords have allowed him to become ambidextrous, letting him switch them between his hands. Kyōraku usually swings with more strength in his left hand than his right, however, he can easily switch or balance the strength between his two hands, allowing him to surprise his opponent. Kyōraku states that he only uses his wakizashi in situations where his katana is too difficult to use. He claims that he does not use them together on a regular basis. The best example of Shunsui's prowess is his ability to fight on even grounds with an unreleased Starrk, the 1st Espada, with only his sealed Zanpakutō, while other captain-level Shinigami have required at least their Shikai to fight against an Espada. Shunsui's fighting style involves evasion and attacking an opponent either in the front or back, using the element of surprise to overwhelm them. His two swords move at a different pace, something he takes advantage of while fighting. While the enemy is at the mercy of his wakizashi's speed, his tachi swoops in for the final blow, which is the most common use of swords like his.

Hakuda Combatant: While rarely observed performing hand-to-hand combat, instead preferring to rely upon his skills in other areas, Shunsui has at least some proficiency in this area, which he briefly displayed during his confrontation with Yasutora Sado.
 * A technique where the user simply extends the index and middle fingers of one hand in unison while they are in contact with an opponent. This gesture possesses enough physical force to effortlessly send someone of even Chad's stature flying several meters away.

Shunpo Master: As a captain, Shunsui is exceptional in the art of Shunpo. During his battle against Yamamoto, he notably makes a massive leap in Shunpo to remove Nanao from the battlefield and return almost instantly, a feat commended even by Yamamoto prior to battle. Shunsui's skill is high enough for him to effortlessly dodge Starrk's attacks without mussing his hat or kimono.

Kidō Expert: Shunsui possesses great skill in Kidō, having used '''Hadō #78. Zangerin''' to considerable effect without reciting its incantation during his battle against Lille.

Master Strategist & Tactician: Despite his laid-back attitude, Shunsui has repeatedly shown himself to be a perceptive and insightful man. According to Yamamoto, even when he was younger, Shunsui has always had an eye for seeing the true character of anyone he meets. Shunsui easily saw through Kurotsuchi's attempt to hide being used by the Bounts. He was also one of the few people to suspect that Aizen was hiding something. In battle, Shunsui has proven to be very adept at noticing and understanding details in an opponent's skills or attack patterns. During his battle against Chad, he quickly determined the basics behind Chad's Reiryoku blasts, warning him about those kinds of techniques, and even explaining that his energy blasts would eventually use up his life energy. Shunsui has also proven himself very persuasive. Shortly after becoming Captain-Commander, he was able to convince Central 46 to agree to all his new requests.

Immense Spiritual Power: As one of the oldest and strongest captains in the Gotei 13, Kyōraku has tremendous spiritual power. He, alongside his best friend Jūshirō Ukitake, are said to possess Reiatsu unmatched by their peers or predecessors. He is not overwhelmed by the Reiatsu of Captain-Commander Yamamoto, though most people would be in such a situation. His power is further displayed in his ability to defeat Coyote Starrk's released form with only his Shikai. His might was also later recognized by being promoted to the status of Captain-Commander.

Enhanced Strength: Shunsui possesses relatively high physical strength, calmly deflecting one of Sado's Reiryoku blasts with a single hand. Offensively, his blows are very powerful, demonstrated when he cracked a barrier, which Aizen had erected, with just a single attack from his Shikai.

Enhanced Durability: Shunsui has proven that he is very durable, even by Shinigami standards. He was able to endure the attacks of Captain-Commander Yamamoto, whose Zanpakutō is the most devastating in all of Soul Society in terms of destructive power. He was also able to withstand a Cero at point-blank range from Starrk in his released form without any noticeable injuries.

Enhanced Endurance: Shunsui possesses considerable stamina and endurance, remaining able to move around and fight as he usually does even after being shot multiple times by Lille Barro's Quincy: Vollständig.

Zanpakutō
Katen Kyōkotsu redirects here. For the manifested spirit see Katen Kyōkotsu (Zanpakutō spirit).


 * His Zanpakutō is unique in that it exists as a daisho sword pair, consisting of a tachi and a wakizashi. Their cross guards are rectangles, with the corners cut off, decorated by a pattern of cherry petals and lines, and each sports a dark-blue handle. He usually keeps them sheathed through his waist tie at his left side; however, during battle, the swords have been placed on both sides of his sash. Like other Zanpakutō, Katen Kyōkotsu has a personality of her own. However, unlike other Zanpakutō, this personality shines through in battle and prevents Shunsui from fighting at full power until Katen Kyōkotsu is in the mood for it. Because of this, Shunsui does not like to "play" with "her".


 * Shikai: Its Shikai command is Kyōraku sets the two blades against each other in a cross, and then pulls after uttering the poem-like command. When the flash clears, Katen Kyōkotsu has become a pair of huge, black, heavily curved Chinese scimitars with silver edges. The hilt and tsuba of each are still the same as they were in Katen Kyōkotsu's sealed-form, but they now sport long red tassels dangling from the end. Despite the two swords becoming identical in this state, Shunsui has stated they still work the same way; one (the wakizashi) is used mainly for speed strikes, and the other (the tachi) is used mainly for power strikes. Thusly, they still exist as a daisho sword pair, with the wakizashi being slightly smaller in size than the tachi.


 * Shikai Special Ability: The power of Katen Kyōkotsu is to "make children's games real". The Zanpakutō makes the rules, and anyone who steps within the boundaries of its spiritual pressure is forced to play by those rules, including Shunsui himself. According to Shunsui, "You win, you live. You lose, you die. She's a fickle one, all right."


 * Shunsui rotates with both blades facing in opposite directions, creating large wind blades that fire toward an opponent from Katen Kyōkotsu. The wind blades join together, forming a spinning circle of wind that, upon contact with a target, envelopes the target with tornado-like intensity. The attack is not only dangerous, but can disorient an opponent trapped within it. The technique is powerful enough to counteract high-powered Cero blasts. The game this technique represents is a spinning top game.


 * This move was used in Shunsui's battle with Starrk, but Starrk's attack hid the nature of the technique. However, Shunsui later explains that in this "game", whoever is higher up "wins."


 * The rule of this game is that whoever gets their shadow stepped on "loses". The game itself allows competitors to manipulate shadows to their advantage. For example, Shunsui has demonstrated the ability to hide himself in shadows when using this technique, and he can also control the shadows, using them to attack an opponent by attacking the shadow they are currently standing upon. In addition, Shunsui can make multiple shadow clones of himself that can attack his opponent from multiple angles.


 * In this color-based game, you say the name of the color you want to cut with your sword, and you cannot cut anything else. If the color that you call does not exist on your body, the damage is minimal, even if the attack would normally inflict a much more severe wound. However, the opposite is also true; by calling out a color you're wearing and attacking, the damage given is proportional to the amount of that color on you. To maximize damage, you have to use a color that maximizes the risks to yourself as well as your enemy. For example, by wearing black robes and calling "black," one would inflict massive damage on an enemy if struck even if the actual blow itself was minor, but the caller could potentially be at risk of suffering major damage in return depending on how much of the enemy's skin or clothing is covered in black.


 * After Shunsui or his opponent is marked as being "it", the other combatant travels toward them on a trail of Reiatsu left by their attack in order to catch them by surprise. However, if the combatant who is "it" sees their opponent while they are moving, that opponent loses and thus dies. The game this technique represents is Daruma-san ga Koronda, a children's game similar to red-light green-light.


 * By staring hard enough at their shadow, Shunsui or his opponent can project an afterimage in a different location; the higher their opponent's Reikaku, the more realistic the afterimage appears to be. The game this technique represents is Chiichan no Kageokuri, where children stare at their shadow on the ground for several seconds before looking at another surface, allowing them to see an "afterimage" of their shadow.


 * Bankai: : While holding his Shikai out in front of him with the blades pointing down, Shunsui activates his Bankai, causing black, root-like tendrils to spread out from him as his Zanpakutō Spirit, Katen Kyōkotsu, appears behind him. Shunsui considers this his last resort, and will only use it if his allies are far enough away from him so that they do not get caught in its effects.


 * Bankai Special Ability: Upon release, an aura covers a large area around Shunsui. This aura changes others' perception of the surrounding environment, making them perceive it as darkened, bleak and gloomy, and causes others to feel varying levels of melancholy and despair.


 * Any wounds that Shunsui or his opponent inflict on each other's body will emerge on their body as well, as if shared. Shunsui compares this to the story of a man who suffers from the same wounds as his partner, but cannot die from them.


 * Black spots appear all over the body of Shunsui's opponent, causing them to bleed profusely. Continuing his story, Shunsui likens this to the man feeling shame after wounding his partner, causing him to collapse in shame and become incurably ill.


 * A massive amount of water engulfs both Shunsui and his opponent, who remain within it until one of them runs out of Reiatsu and drowns. Shunsui compares this to the two characters from his story, who both hurl themselves into gushing waters.


 * After sheathing his swords, Shunsui winds a white thread around his opponent's throat multiple times before pulling it taut, leaving a deep cut in their throat that expands before blowing up their head. Completing his story, he likens this to the regretful man's partner ignoring his pleas and mercilessly shearing his throat.

Zanpakutō
Moodiness: Katen Kyōkotsu is moody and will not showcase her full power until in battle, and even then she must be in the mood to do so.

Follow the Rules: Shunsui is subject to the same rules as his opponent.

Indiscriminate Effects (Bankai): The effects of Katen Kyōkotsu: Karamatsu Shinjū are indiscriminate, such that Shunsui prefers not to use it if there are comrades within the range.

Appearances In Other Media

 * Both PSP and Nintendo DS Bleach games portrayed Shunsui's Shikai as allowing him to manipulate wind. However, this was prior to the revelation of the true nature of his Zanpakutō and Shikai.
 * In Bleach: Dark Souls, Shunsui can perform various wind attacks with his Shikai:
 * Fires several wind-discs that damage the enemy on contact.
 * A series of whirling slashes that damage the enemy on contact.
 * A tornado is summoned that damages the enemy on contact.
 * Shunsui drinks sake.
 * Summons a torrent of wind that damages the enemy on contact. This is one of Shunsui's two super moves.
 * Creates multiple tornadoes that damage the enemy on contact. This is one of Shunsui's two super moves.


 * In both Bleach DS games, The Blade of Fate and Dark Souls, Kyōraku is able to perform a special move together with Jūshirō Ukitake, when they are in a team. The attack is called . It combines a powerful hurricane-like, green wind-attack, performed by Kyōraku, and lightning in form of several ball-lightnings, which form diamonds, performed by Ukitake. This is notable in that in both games, it is the only such 'team attack' possible.
 * Kyōraku appears in Soul Resurrección, utilizing his true Shikai abilities and is able to fight with Bushogama, Kageoni, and Takeoni. Additionally, he uses an attack called, where Shunsui vanishes into the shadows with Kageoni while nearby enemies are heavily damaged by swirling black energy, as his Ignition Attack.
 * In Bleach: Brave Souls, various versions of Shunsui are playable. His Thousand Year Blood War arc version draws from his appearance after the first invasion of Soul Society when he is made Captain-Commander of the Gotei 13. In this form, Shunsui is a melee character with the "Hollow Killer" ability. His special attack is, where he unleashes the first three acts of his Bankai before finishing off the opponent with Shime no Dan: Itokiribasami Chizome no Nodobue, inflicting immense damage with a small chance to instantly kill any targets.
 * Shunsui's Novel version also appears as a playable character in Bleach: Brave Souls as commemoration for the Can't Fear Your Own World tie-in. He is deployed in his Captain-Commander form, but fights in his Shikai. His special is his novel-exclusive Shikai ability:, a game of truth-or-lie where Shunsui punishes his foes with various tiers of pain until the foe finally tells the truth; this technique is based on the Japanese version of the pinky swear.
 * Shunsui appears in the 2011 and 2012 editions of the Rock Musical Bleach, where he is played by Ishizaka Isamu.

Censorship

 * When Sado was cut down by Shunsui Kyoraku, the slash wound and the blood produced from it, weren't visible in the anime, as it was in the manga.

Trivia

 * "If it's me, it would be a waste not to dance no matter what." - Tite Kubo
 * His theme song, as chosen by Tite Kubo, is Carlos Gardel's "Por una Cabeza".
 * Shunsui's name is sometimes romanized as Syunsui Kyoraku.
 * Shunsui was ranked the 36th most popular character in the second character popularity poll, 29th in the third, 17th in the fourth, and 10th in the fifth.
 * Katen Kyōkotsu ranked 33rd in the first Zanpakutō poll and 6th in the second.
 * In the second best bout poll, Shunsui's fight with Coyote Starrk ranked 5th, his fight alongside Jūshirō Ukitake against Genryūsai Shigekuni Yamamoto ranked 19th, his joint fight against Sōsuke Aizen ranked 47th, his fight with Yasutora Sado ranked 68th, and his fight against Robert Accutrone ranked 83rd.
 * While Shunsui is his first name and Kyōraku is his last name, his full name is Shunsui Sakuranosuke Kyōraku no Jirō. Kyōraku no Jirō means "second son of the Kyōraku family" while Sakuranosuke means "assistant who conceals/possesses all".
 * Shunsui is the only Shinigami known to wield a Zanpakutō that exists as two completely separate blades in both its sealed state and its Shikai.
 * His Zanpakutō and Jūshirō Ukitake's Zanpakutō have the longest release commands as of yet. Word-for-word, Ukitake's is the longer of the two, although the translation in the English manga drastically shortens it and lengthens Shunsui's.
 * The Shinigami Women's Association released a photo collection on Shunsui, titled "Using Arms as My Pillow". It quickly sold out, partially due to there being less copies released than similar collections by the other captains. Shunsui is unaware that it has not been re-printed.
 * In the Shonen Jump release of Chapter 559, Shunsui appeared with his right eye intact and with no eyepatch. However, this was corrected in the release of Volume 62. This error occurred a second time in Chapter 604, but was corrected in later chapters.
 * The name of Shunsui's Bankai was originally written as when Shunsui activated it in chapter 647, and was subsequently changed to  in chapter 648 before being changed to its current version in chapter 649, which the volume versions of chapters 647 and 648 had their versions changed to as well.
 * When Shunsui is explaining the history of Nanao's family and her mother to her in chapter 651, Nanao's mother is wearing his flowery kimono.

Quotes

 * (To Yasutora Sado) "Then it can't be helped. Drink, my friend! Since you won't turn back, at least stay here for a while. Just a little while. All the other captains must have made their moves by now. This battle should be over soon. Until then, please stay here and drink to your heart's content."


 * (To Yasutora Sado) "Rescue Rukia-chan? She has only been gone since spring. Time's too short. The friendship is not strong enough. You should have no reason to give up your life for her."


 * (To Yasutora Sado) "Since you are so determined, it was impolite of me to try to dissuade you. I apologize for that. Very well then. I have no choice but to take your life."


 * (To Genryūsai Shigekuni Yamamoto) "But a huge matter like this isn't something you encounter every day, right? It's that fatherly love where you want to get your subordinate some experience."


 * (To Kisuke Urahara) "Waiting patiently and believing in your subordinates is all part of a captain's job."


 * (To Nanao Ise when asked how he remembers her name) "Well, you are the youngest member of the squad. And I could never forget the name of a cute young girl, now, could I?"


 * (To Katen Kyōkotsu) "It goes against my nature to get rough with women. I happen to be a gentleman."


 * (To Coyote Starrk regarding Tōshirō Hitsugaya's strength) "Well, I don't know. Captain Hitsugaya is a genius, after all. Give him another hundred or so years, and he might outdo me yet."


 * (To Coyote Starrk) "I'm not sure I like you deciding what is and isn't like me, Mr. Espada. If you really want to go into this, I'd say it's a lack of such distinctions that makes up my identity."


 * (To Love Aikawa) "Throwing away victory for the sake of manners is a rookie mistake. Captains don't have the time to waste on that kind of thing. Don't waste your time trying to play the good guy. No matter what debts you may owe, from the instant you find yourself on the battleground, both sides are evil."


 * (To Sōsuke Aizen) "I guess I'm just not much of a listener when it comes to guys. I get bored pretty quickly."


 * (To the Gotei 13 regarding his freeing of Aizen) "Honor? Is that what you are all talking about? Then let us speak instead of our duty to the Gotei 13. Honor will not protect the world. I do not believe that using evil to defeat evil is itself an evil act."

Navigation
Shunsui Kyōraku Shunsui Kyōraku Shunsui Kyōraku