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Kou Yoku
Chinese Xiang Yi
Kanji 項翼
Romaji Kou Yoku
Epithet Thunder
Biographical Information
Marital Status Single
Age Mid 20s
Gender Male
State Chu
Location Chin City (Former)
Professional Information
Classification Unit Commander
Occupation Soldier
Affiliates Chu Military
Rin Bu Kun Army (Defunct)
Ka Rin Army
Kou Yoku Army
Coalition Army (Defunct)
Military Rank General
Equipment Bakuya Sword
Bow and Arrows
Japanese VA Suzuki Tatsuhisa
Manga Debut Chapter 253
Anime Debut Episode 78
The Name's Kou Yoku The Thunder! 5000-Man commander of Chu!! It's showdown time, Qin Commander Tou!!

—To Tou and the Tou Army.

Kou Yoku is a General of the state of Chu and is also known as the "Thunder", He is around the same age as Ri Shin, Ou Hon, and Mou Ten and a part of Chu's young generation of military commanders.


Kou Yoku is clean-shaven and has shoulder-length, greasy looking hair.


Kou Yoku's personality bares some similar to that of Shin's: Rude, laid back and intense when it comes to combat, he also appears to be an instinctual fighter down to the core.


Possibly since his days as a 100-man commander, Kou Yoku spent many years touring the Southern battle lines of Chu with Rin Bu Kun and Haku Rei.


Sanyou Aftermath Arc[]

After the Qin army had successfully conquered the Sanyou region of Wei, Kou Yoku and Haku Rei were stationed at the Qin border under the command of General Rin Bu Kun. He went to taunt the Hi Shin Unit with arrows for three days until Shin has enough and jumps from the top of their post on the cliff to kill him, He blocks the attack and they soon begin trading blows. The Chu retreat to stop a battle from breaking out but Shin continues to chase them. Kou Yoku fires arrows at him but Shin easily deflects them before Haku Rei knocked him off his horse with one shot. Shin then tells them the young 1000-Man Commanders of Qin are all monsters and they aren't in the same league. Later, he is scolded by Rinbukun for fighting Shin. He then asked him about Shin's abilities. He responds by saying he was nothing special. Haku Rei then says he is quite strong, but he's no match for Kouyoku with his Bakuya Sword. A few days, later Qin and Chu pull back their forces.

Coalition Invasion Arc[]

He was present for the meet up between Shun Shin Kun and Ri Boku. After the meeting, Rin Bu Kun asked Shun Shin Kun if Ri Boku was planning a Chu/Zhao Alliance. To which he told them that they were underestimating Ri Boku because it is something far more terrifying than they could imagine. Months later, he is part of the first wave of Chu forces invading Qin from the border and is shocked when their army encounters the Tou Army.

During the Battle of Kankoku Pass against Qin, Kou Yoku is placed in the Chu 1st Army along with Haku Rei, led by General Rin Bu Kun. He tried to kill Mou Ten, but Mou Ten easily parries his blows. Then he remembered Shin's words about the young 1000-Man Commanders of Qin and was about to pull out his Bakuya Sword but the duel was halted when Roku O Mi came charging in to slay Rin Bu Kun.

Later, when Mou Ten is about to slay Haku Rei, Kouyoku arrives to parry the blow, knocking Mou Ten off his horse. Before he can kill Mou Ten, Ou Hon arrives to save him and both forces engage each other in battle. Kou Yoku unsheathes his Bakuya Sword and duels Ou Hon. As they clash, word arrives of Rinbukun's death at Tou's hands.

At night, as they cremate Rinbukun’s body, he promises to get revenge by killing Tou.

The next day, he and Hakurei are transferred to the 2nd Army said to be dangerous even for allies; under the command of General Ka Rin. Later that day, everyone from the first army above the rank of 1000-Man Commander was gathered up. They were shocked to meet the giant, cold-hearted General Karin. She calls out Rinbukun's lieutenant Ro Kin. As he pledges his loyalty, she kicks and breaks his neck, saying she has no use for "incompetent fools who reek of that baldie." and that if it was up to her, they would all be executed. She later declares that the remnants of the 1st Army will fight that day with no assistance from her 2nd Army. And if they are unable to slay the enemy general Tou, they will all be executed. She leaves telling them that if they tell anyone about her height their heads will roll.

During the 15th day of the battle, General Karin, seeing that Tou himself is on the battlefield, promotes Kouyoku to a 5000-Man Commander and orders him to aim for Tou's head. Kou Yoku takes this opportunity to avenge his friend Rinbukun and heads out. In an attempt to surround the enemy general, Kou Yoku spreads his army while engaging Tou in combat himself. As the two men duel, their armies try to take each other out. This way, Kou Yoku keeps Tou occupied and prevents him from attacking the Ka Rin Army, who has now entered the battlefield as well.

State of Ai Arc[]

He and Haku Rei make a cameo, along with Ka Rin and other members of the Chu military. They take part in the Battle of Gento.

Koku You Campaign Arc[]

A panicking and shocked Yoku and Haku Rei return to the capital after Shun Shin Kun's assassination. He is later present when Ka Rin meets with Ren Pa and Ri En.

War of the Three States Arc[]

Ka Rin sends Kou Yoku and Haku Rei, whom both are now newly promoted Generals, to assist the Juuko Army in repelling the Qin invasion led by Mou Bu. As soon as they arrive on the battlefield, they immediately engaged the Roku O Mi Army in an attempt to wipe them out but were given orders to reorganize the formation from Juuko Army's strategist when a Wei army of 70,000 arrive as allies to Qin.

The battle of Qin/Wei alliance, 120,000 soldiers, vs Chu, 110,000 soldiers, began with the Chu losing ground. But was halted by the elites army of the Man'U Army and Gen'U Army. The tide changes when Ba Kai, a general of Wei is killed by Gen'U. Forcing Go Hou Mei to change Wei to take up as a support role while the Qin as offensive role to take down the Chu's HQ.

In the midst of the battlefield, Kou Yoku is ordered to handle Tou and meets his older rival since the last encounter from the Coalition's Invasion six years ago. Kou Yoku gleefully states that Tou shouldn't blink or else he'll get slice up several times which the Great General replies 'he's a thousand years too early' with a smirk. After a brief duel between the two. Kou Yoku is interrupted with the arrival of Ran Bi Haku and his army. Not realizing what Tou had in mind, the Qin general slipped pasts Kou Yoku and had his men follow him to strike at Chu's HQ.

Yoku, surprised of this event, chases after them before they could reach Chu HQ. Thanks to Haku Rei's 'Snipe Shot', though failed to kill Tou, has given Kou Yoku a time to catch up to him but is again interrupted by Ran Bi Haku. Allowing Tou to captured Chu HQ, while Kou Yoku is preoccupied with the 'Berserker'. The fall of CHU HQ forces all Chu forces to withdraw and regroup. Much to Kou Yoku's dissatisfaction. Later on found out that Juuko city is captured by Wei army, Man U, having no intention on retaking back, decides to retreat back to Chu's capital Ei. With their first campaign as generals both for him and Rei leaving in crushing defeat, they were in a bad mood.


Strength 93
Leadership 88
Intelligence 79
Experience A

Strength 91
Leadership 86
Intelligence 78
Experience B
Personality: rough

Strength 90
Leadership 84
Intelligence 78
Experience C
Loves: Bakuya Sword

Kou Yoku is a talented military commander with great potentials. During the Battle of Kankoku Pass and after being promoted by general Ka Rin, he led a hastily organized 5,000 men unit and lured out general Tou due to his status as a captain, his abilities impressing Ka Rin who called him "a talent to be nurtured".

Physical Abilities[]

Master Swordsman: Kou Yoku is heavily offense-oriented and a powerful master swordsman with great amount of potential which he demonstrated when he blocked Shin's Hi Slash which was reinforced by him jumping off a cliff, killed multiple veteran soldiers of the Tou Army, withstood and blocked Ou Hon's spear thrusts, and fought one on one with General Tou's Rasen swordsmanship for a considerable amount of time which was incredibly impressive given that the man killed his general just a few days earlier.

Immense Strength: Living up to his title of Thunder, Kou Yoku possesses monstrous strength, with Shin commenting on how heavy his sword strikes were during their brief clash. During the Coalition Invasion of Qin, he demonstrated incredible feats as he sent Mou Ten flying off his horse during his attack on Haku Rei 's position, sent Ou Hon along with his horse reeling off the ground, and possibly one of his feats to this date includes blocking and stopping General Tou's Rasen - Faru Faru sword strike.

Immense Stamina & Endurance: Kou Yoku also displays an impressive amount of stamina as he withstood multiple attacks of the Tou Army soldiers during his attack on their general and kept fighting on despite excessive blood loss during his duel with Tou.

Yoku shooting an arrow at Shin's chest.

Archery: While not as powerful as his best friend Haku Rei, Yoku demonstrated some considerable skill in archery as he was able to aim at Shin's chest while riding a horse.


While wielding his legendary sword, Kou Yoku has shown himself a capable leader and source of inspiration for his men.

Tactical Abilities[]

Teamwork Tactics: Kou Yoku has shown the capacity for teamwork combining his unit with Haku Rei's very quickly in order to stall the combined assault of the Gaku Ka and Gyoku Hou Units.


  • vs. Shin: Interrupted
  • vs. Mou Ten: Won
  • vs. Ou Hon: Interrupted
  • vs. Tou: Interrupted


Pussies! Pussies! Pussies! Woah!! What's this? What kind of man stays silent through all this!? You must be a gigantic coward with no balls! Haha, No balls! No balls! A little girl! Woah!!

(Chapter 254: Chu's Young Generation, page 65)

This guy really is one hell of an idiot.

(Chapter 254: Chu's Young Generation, page 69)

The name's Kou Yoku, 1000-man commander of Chu also known the Thunder.

(Chapter 254: Chu's Young Generation)

From the very start, I knew that we wouldn't be able to fight as a hastily formed 5000-Man Army. But a "5000-man commander's head" is plenty to serve as bait to lure out Tou. All that's left is for me to Kill Him!!

(Chapter 307: 5000-Man Commander Kou Yoku, page 31)


(Chapter 307: 5000-Man Commander Kou Yoku, page 35)


  • Due to his military talent, mastery in swordsmanship, and ownership of the famous Bakuya Sword, Kou Yoku is possibly related to or the son of Kou En, the Tiger of Chu.

Royal Palace
Royal Family Rou Ai - Queen Mother

Government Chou Kou - Ko Reki
Generals Current
Han O Ki
Wa Tegi

Commanders Han Roki - Ha Mui - Bu Tai
Royal Palace
Royal Family Formerly
Shou Hei Kun

Government Shun Shin Kun
Great Generals Kan Mei - Ka Rin

Generals Formerly
Rin Bu Kun

1000-Man Commanders Haku Rei - Kou Yoku
Great Generals Sei Kai

2000-Man Commanders Formerly
Leader Jo Elder

Civilian Shuu (Jo)
Royal Palace
Royal Family Ou Ken
Generals Ganmo
Royal Family Current
Ei Sei - Queen Mother - Rei - Rui
Boku Kou - Sei Kyou - Sho - Sou Jou

Government Current
Ri Shi - Ryo Fui - Sai Taku - Shi Shi - Shou Hei Kun - Shou Bun Kun
Ketsu Shi

Royal Harem Amin - Chou Kou - Kou - Rou Ai - You
Great Generals Current
Mou Bu - Tou
Chou Tou - Duke Hyou - Mou Gou

Six Great Generals:
Ko Shou - Kyou - Haku Ki - Ou Ki - Ou Kotsu - Shiba Saku

Generals Current
Do Mon - Heki - Kan Ki - Kan Ou - Ou Sen - Roku O Mi - Ryuu Koku - Shou Kaku
Dou Kin - Ei Bi - En Ka - Koku Gou - Ra Gen - Rin Bou - Ryuu

5000-Man Commanders Ou Hon - Shin

3000-Man Commanders Kyou Kai

2000-Man Commanders Mou Ten

1000-Man Commanders Curent
Hoku Shu - Gaku Rai - Kaku Un - Kan Jou - Ogiko - Ran Dou
Baku Koshin - Jou Han - Kaku Bi - Tai Un

100-Man Commanders Chu Tetsu - Den Ei - Den Yuu - Hai Rou - Kyo Gai - Ryuu Sen

10-Squad Leaders Bi Hei - Ro En - Ryuu Yuu - Seki - Suu Gen - Taku Kei

5-Squad Leaders Former
Batsu Ken - Bi Tou - Bun Ketsu - Hou - Kyou Ji - San Ka - Yuu Gi

Strategists Ka Ryo Ten - Kai Oku - Mou Ki
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King Yo Tan Wa

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Great Generals Current
Go Hou Mei
Seven Fire Dragons:
Gai Mou
Go Kei - Tai Roji - Shi Ei - Rei Ou - Shou Sen - Ba Tou

Generals Current
Fuu Haku - Kan Ei
Kyuu Gen - Haku Kisai - Ga Gyuu - Rinko - Gen Bou - Kyou En - Kai Shi Bou

1000-Man Commanders Former
Dou Sei

Strategists Hyou Ki
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Geki Shin - Gaku Ki
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Great Generals Three Great Heavens
Ri Boku - Hou Ken
Rinshoujou - Ren Pa - Chousha
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Man Goku - Shou Mou - Fuu Ki - Rin Ko - Gen Bou - Kyou En - Kai Shi Bou - Kei Sha

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Ryuu Tou

1000-Man Commander Gou Ran

Strategists Chousou

Commanders Kaine - Fu Tei

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Ryo Fui - Shi Ka - A Mon - Kou Shou