Arc 4The Fifth Emperor

Natsu drove the Marines from Origin Island and prepared the Uchiha Clan to grow stronger through Haki, while news of his bounty spread across the seas. As the clan’s defenses improved, Natsu prepared to leave, and Ace crossed paths with Luffy while pursuing Teach.

  • Natsu fought Kizaru until the Marines’ fleet escaped, then vowed with the Uchiha to avenge their dead and ordered the clan to train in Haki.
  • Natsu befriended Ace, gave him a ship, warned him about Teach, and secretly marked him with Flying Thunder God before Ace sailed away to pursue Teach.
  • Natsu mourned the four Uchiha who died and directed the clan’s recovery, training, and development of Origin Island.
  • Natsu drew the Void Demon Fox and learned that its Sage Mode could strengthen Mangekyō Sharingan users and extend their lifespans.
  • Sengoku ordered nearby Marine branches to withdraw and issued bounties for Natsu, Fugaku, and Uchiha fighters, while Morgans publicized Natsu as the Fifth Emperor.
  • Whitebeard taught Natsu Haki training methods, and Natsu brought them to Fugaku, who began organizing lessons for the clan’s stronger members.
  • Natsu gave Izumi a Flying Thunder God kunai for emergencies, then told Fugaku he would be away for three to five days as Fugaku’s second Hashirama Cells transplant stabilized.
  • Ace prepared to pursue Teach in Rainbase, met Luffy and the Straw Hat Pirates, warned Luffy about Crocodile, and gave him a black Den Den Mushi.
Chapters 76–101 Vol. 1 Read

Ch. 76Natsu: It Won't Be So Easy to Leave!

Uchiha Natsu used a Flying Thunder God kunai to pursue Kizaru and turn their stalemate into a desperate chase across the sky. Kizaru finally halted and fired a laser at Natsu to break the pursuit.

  • Natsu decided he could not let the Marines retreat without consequence and threw a kunai marked with Flying Thunder God formulae at Kizaru.
  • Kizaru dispersed into light to avoid the kunai, but Natsu vanished and appeared behind him.
  • Natsu repeatedly teleported to the kunai and pursued Kizaru as he dodged across the sky, stunning the Marines watching from their ships.
  • Gion, Onigumo, and Hōshō watched in shock as Natsu forced Kizaru into a desperate flight.
  • Kizaru stopped and fired a concentrated laser downward at Natsu, hoping to limit his escape routes.

Ch. 77Wood Release!

Natsu used Wood Release to shield himself from Kizaru’s Yasakani no Magatama, forcing the Admiral to abandon his restraint and attack with a sword of light. The chapter ended as Kizaru charged toward Natsu atop the Wood Golem.

  • Natsu used the Flying Thunder God technique to evade Kizaru’s lasers and throw a marked Kunai toward him.
  • Kizaru realized Natsu’s teleportation depended on the marked Kunai, retreated out of range, and unleashed Yasakani no Magatama.
  • Natsu summoned a massive Wood Golem and several Wood Dragons, which endured Kizaru’s barrage and protected him.
  • Gion, Onigumo, Hōshō, Blackbeard, and Ace watched in shock as Natsu’s wooden constructs withstood the Admiral’s attack.
  • Kizaru formed Ame no Murakumo and charged at Natsu with a devastating sword strike.

Ch. 78Majestic Attire: Susanoo! Kizaru Stunned

Natsu armored his Wood Golem with Susanoo and overwhelmed Kizaru in a direct clash, leaving the Marines and pirates stunned. Uchiha Fugaku recognized Natsu’s Flying Thunder God Technique and Wood Release, then recalled that Natsu had sent people to steal the Book of Seals.

  • Natsu covered the Wood Golem and Wood Dragon in Susanoo armor, greatly increasing their power.
  • Kizaru attacked at full speed, but Natsu’s armored Wood Golem stopped his Ame no Murakumo with a single slash.
  • Natsu drove the Wood Golem’s blade forward and sent Kizaru flying backward.
  • Gion, Onigumo, Hōshō, Blackbeard, and Ace reacted to Natsu’s strength, with Blackbeard eyeing his powers and Ace eager to fight.
  • Uchiha Fugaku recognized Natsu’s Flying Thunder God Technique and Wood Release, then remembered Natsu had arranged to steal the Book of Seals.

Ch. 80Fugaku Uchiha's Shock

Natsu used the Flying Thunder God Technique to pressure Kizaru, but Kizaru realized Natsu lacked Haki and used his Logia powers to evade every attack. With Kizaru keeping Natsu occupied, Gion ordered the Marine warships to retreat at full speed.

  • Fugaku and the Uchiha clansmen were stunned when Natsu demonstrated the Flying Thunder God Technique.
  • Kizaru recognized that Natsu relied on chakra and could not use Haki, then changed tactics to avoid direct clashes.
  • Natsu repeatedly attacked Kizaru with the Wood Golem, kunai, and Tang Saber, but Kizaru evaded by turning into light and countered with lasers.
  • Kizaru taunted Natsu as their fight settled into a stalemate, with neither able to harm the other.
  • Gion ordered the Marine warships to retreat at full speed while Kizaru held Natsu back.

Ch. 81Blackbeard's Escape

Blackbeard escaped Origin Island after using his crew and the Dark-Dark Devil Fruit to fend off Ace, while the Marines fled under Kizaru’s cover. Ace was left alone on the sea, furious that Teach had escaped again.

  • Kizaru blocked Fugaku and the others from pursuing the Marine fleet as he fought Natsu overhead.
  • Ace attacked Blackbeard and forced him to stay, but Jesus Burgess, Lafitte, and Doc Q rushed in to cover Blackbeard’s retreat.
  • Blackbeard took Ace’s Fire Fist head-on and used the impact to launch himself onto his pirate ship.
  • Blackbeard’s crew set sail, and he swallowed Ace’s pursuing Fire Fists with his Black Hole as the ship pulled away.
  • Blackbeard taunted Ace before disappearing over the horizon, leaving Ace raging and blasting the surrounding sea with fire.

Ch. 82The Fleeing Marines

Natsu and Kizaru fought to a stalemate, their attacks creating a devastating tsunami while each held back to protect their allies. Kizaru eventually withdrew toward the retreating Marine warship, leaving Natsu on Origin Island after the Marines escaped.

  • Natsu and Kizaru clashed in the sky, and their shockwaves raised a tsunami that forced Fugaku and the Uchiha clansmen to flee inland.
  • Ace escaped the battlefield, while Gion struggled to keep the Marine warship steady as the waves battered it.
  • Natsu and Kizaru fought for more than an hour, each restraining himself to avoid exposing his allies to attack.
  • After the warship disappeared beyond the horizon, Kizaru pulled away and flew after it without another strike.
  • Natsu dismissed the Susanoo and Wood Golem, then acknowledged that the Marines had retreated but that he had failed to capture Kizaru.

Ch. 83The Lost Uchiha Clansmen

After the Uchiha Clan repelled a massive Marine assault on Origin Island, Natsu confronted the clan members’ despair over having relied on him to protect them. He urged them to learn Haki and vowed to lead them against the Marines and World Government in half a year.

  • Uchiha Kei, Yashiro, and Fugaku reflected on how Natsu had protected the clan during the battle and felt ashamed of their weakness.
  • Natsu challenged the clan members to stop dwelling on their failure and consider the overwhelming Marine force they had faced.
  • Natsu explained that Armament Haki and Observation Haki had given the Marines their advantage and said the Uchiha could learn them too.
  • Natsu ordered every clan member to master both types of Haki within half a year and vowed to avenge the attack and the World Government’s attempt to use them as test subjects.
  • The Uchiha members raised their heads with renewed determination, and Fugaku’s guilt gave way to resolve.

Ch. 84Is the D Clan's Intelligence All Invested in Dragon?!

After their defeat, the Uchiha considered how their Sharingan had helped them study Haki, and Fugaku believed he could learn to wield it with time. Natsu arranged a replacement ship for Ace, who had come to pursue Blackbeard but had wrecked his own boat, leaving the Uchiha worried about whether he could sail safely.

  • The Uchiha clansmen reviewed their clashes with Marine officers, and Fugaku recalled how Gion used Haki against his Susanoo as he considered how to learn the power.
  • Natsu saw Ace trying to patch his badly damaged ship and asked why he bothered repairing it.
  • Ace introduced himself as Portgas D. Ace, commander of the Whitebeard Pirates' Second Division, and asked for help getting a ship.
  • Natsu told Uchiha Kei to give Ace a sturdy seized ship in recognition of his help holding off Teach.
  • Uchiha Kei questioned whether Ace could navigate, so Natsu ordered a small single-masted ship with a compass, a West Blue map, and two life rings.

Ch. 85Ace: Are We Friends Now?

Ace offered to teach the Uchiha Haki, and Natsu accepted their friendship despite fearing the clan would later risk everything to save him. Before Ace left to hunt Blackbeard, Natsu warned him he would die, but Ace refused to turn back.

  • Ace offered Natsu a bag of money for a boat and apologized to Fugaku after mistaking him for an uncle.
  • Natsu asked Ace to teach the Uchiha Haki and promised the clan would repay him with a favor.
  • Ace called Natsu his friend, and Natsu agreed, knowing the Uchiha might one day intervene in Ace’s fate.
  • Ace gave Natsu Whitebeard’s personal Den Den Mushi and said Whitebeard could teach the Uchiha Haki.
  • Natsu warned Ace that Blackbeard was dangerous and urged him to return to the Whitebeard Pirates, but Ace insisted on bringing Teach back for judgment.
  • Natsu told Ace he would die and condemned Roger for failing to protect Ace’s mother, while Ace remained determined to pursue Teach.

Ch. 86Ace: Would You Despise Me for Being a Child Born with Sinful Blood?

After Ace accepted Natsu as his brother and sailed away, Natsu marked him with a Flying Thunder God formula and returned to the aftermath of the Marines’ defeat. The Uchiha mourned four clansmen killed defending Origin Island and carried their bodies back to the clan grounds.

  • Ace asked whether Natsu despised him for being Gol D. Roger’s son, and Natsu urged him to define his own fate rather than heed others’ judgments.
  • Ace accepted Natsu as his brother, sailed away, and promised to return alive and introduce him to Pops.
  • Natsu secretly placed a Flying Thunder God mark on Ace, then watched his boat disappear over the horizon.
  • Natsu ordered the Uchiha to clean up after their victory over the Marines, noting that more than four thousand Marines had fallen and four Uchiha had died.
  • Natsu mourned Uchiha Xiao Ye, while Uchiha Kei grieved for Uchiha Jian and Fugaku performed the clan’s blood farewell ritual for all four dead.
  • The Uchiha covered the fallen with white cloths bearing the Uchiha Gunbai and carried them silently toward the clan grounds.

Ch. 87Vengeance for Today's Grudge!

After four Uchiha died defending their home, Natsu vowed revenge and ordered the clan to intensify its Haki training. Their grief drove many to awaken their Sharingan, while Natsu returned alone to the bloodstained beach.

  • Natsu addressed the Uchiha gathered at the village entrance, vowed to avenge the four dead, and ordered every clan member to train in Armament Haki and Observation Haki.
  • The Uchiha mourned their dead at four bonfires, and Natsu held the Den Den Mushi Ace had left behind as he considered the threats ahead.
  • The next morning, Uncle Jian's students practiced his Iaijutsu, and Uchiha Rin awakened a One Tomoe Sharingan before other students revealed Two Tomoe.
  • Fugaku and Uncle Kei watched as grief and anger led many Uchiha to awaken their Sharingan and gather at the Training Ground to grow stronger.
  • Natsu went alone to the beach where the battle had taken place as the waves washed away the remaining bloodstains.

Ch. 88Natsu: I Wonder If Uchiha Itachi Will Cry When He Can't Find Sasuke?

After mourning four fallen clansmen, Natsu renewed his resolve to protect the Uchiha and lead them to greatness. The next morning, he visited Naka Shrine, promised Sasuke new ninjutsu lessons, and reviewed the clan’s population, training progress, and supplies with Fugaku.

  • Natsu grieved for the four clansmen he had failed to save, then resolved to grow strong enough to protect the Uchiha.
  • Natsu found Sasuke studying a ninjutsu scroll at Naka Shrine and promised to teach him a new technique that afternoon.
  • Natsu reflected on leaving Itachi behind in Konoha with Sasuke gone and wondered how Itachi would react.
  • Fugaku reported that the clan numbered 13,271 people, with more than 17,000 including captives and newcomers, and described their chakra training and assigned work.
  • Fugaku told Natsu that clan resources would last about a year and a half, while land reclamation and hunting helped prepare the Uchiha to become self-sufficient.

Ch. 89Natsu's Headache, System Achievement Unlocked! First Show of Edge!

Natsu and Fugaku discussed Origin Island’s resource limits and the Uchiha Clan’s plans to grow stronger and seize territory in the West Blue. The system then rewarded Natsu for the clan’s victory over the Marines, and his achievement trait draw landed on the orange region.

  • Fugaku told Natsu that Origin Island was about forty percent developed and could support at most thirty thousand ninjas at their current rate of consumption.
  • Natsu rejected developing nearby barren islands and ordered the clan to use its resources freely so every eligible clansman could reach at least Elite Genin strength within two years.
  • Natsu planned to target the West Blue’s kingdoms and resources, while Fugaku said he wanted to increase his Hashirama Cell dosage to strengthen his Mangekyo Sharingan.
  • Natsu agreed to a gradual increase and planned to recruit top scientists to advance Hashirama Cell research.
  • The system announced that Natsu had unlocked the First Show of Edge achievement, granting him a trait draw chance and thirty thousand system points.
  • Natsu used the draw, and the pointer stopped in the orange region as powerful energy formed four characters in his sea of consciousness.

Ch. 90Orange Trait: Return to Origin! Orange Reward: Void Demon Fox! A Peerless Genius

Natsu activated Return to Origin, purifying and strengthening the Uchiha bloodline, then drew the Void Demon Fox and learned it could guide the clan toward a powerful new Sage Mode. The chapter left Natsu envisioning the Uchiha's rise and wondering how far the other plane's protagonist had gone.

  • Natsu saw that Return to Origin permanently strengthened the Uchiha Clan and removed Hashirama Cell rejection, so he told Fugaku to proceed with his transplant.
  • Natsu drew the Void Demon Fox, a juvenile creature with immense potential and a Sage Mode method created for the Uchiha Clan.
  • The system explained that it had counterparts across parallel planes and could copy what their hosts had cultivated.
  • The system told Natsu that Mangekyō Sharingan users could learn the Void Demon Fox's Sage Mode, which could multiply their power and extend their lifespans.
  • Natsu admired the other plane's protagonist for forging a path that could let the Uchiha Clan surpass the Ōtsutsuki Clan.

Ch. 91Return to Marine Headquarters

Gion returned to Marineford injured and reported how the Navy’s mission on Origin Island had escalated into a disastrous war with the Uchiha Clan. Sengoku learned that Onigumo’s disobedience and CP0’s interference had turned the clan against the Navy, and he left the World Government’s role to be dealt with later.

  • Gion arrived at Marineford aboard a badly damaged warship and requested punishment for her failed mission.
  • Gion recounted the conflict on Origin Island, including Onigumo’s attack, CP0’s intervention, and the battle that followed Kizaru’s arrival.
  • Sengoku concluded that Onigumo’s unauthorized action had made the Uchiha Clan the Navy’s enemy and that CP0’s appearance confirmed the World Government had infiltrated Marine Headquarters.
  • Sengoku grew furious that the Five Elders had interfered with the Navy’s operation, but told Sakazuki they would settle the matter later.
  • Sakazuki objected to the World Government creating enemies for the Navy and bypassing Marine command.

Ch. 92Borsalino: How Scary, Sengoku-san~

Sengoku and the Marine leaders assessed Uchiha Natsu’s overwhelming abilities and concluded that the Marines could not spare forces to confront the Uchiha Clan. Sengoku ordered the West Blue branches to retreat and decided to hold the Five Elders responsible for the crisis.

  • Sengoku asked Borsalino to describe his fight with Uchiha Natsu, and Borsalino detailed Natsu’s strange powers, formidable defenses, and admiral-level threat.
  • Sengoku realized the Marines could neither retaliate nor ignore the Uchiha Clan, since their forces were stretched thin across the New World and Marineford.
  • Tsuru warned that the Uchiha Clan’s territory, clansmen, and organized system made it harder to handle than a single Four Emperor.
  • Sakazuki objected to letting the deaths of four thousand Marines go unanswered, but Sengoku explained that pulling an admiral away would endanger other regions.
  • Sengoku ordered West Blue branches near Origin Island to withdraw three hundred nautical miles and forbade them from provoking the Uchiha Clan.
  • Sengoku said he would go to Mary Geoise and tell the Five Elders to resolve the trouble they had caused.

Ch. 93Bounty of 3.5 Billion Beli! Void Demon Tamer Uchiha Natsu!

After arguing over the Navy’s response to Uchiha Natsu, Sengoku decided to issue carefully limited bounties rather than provoke the entire Uchiha Clan. He set Natsu’s bounty at 3.5 billion Beli and left ordinary clansmen without bounties for now.

  • An enraged Sakazuki left the office to return to G2 Base, while Kizaru departed and Gion went to recover from her injuries.
  • Tsuru and staff officers urged Sengoku to issue bounties as rumors about the Uchiha spread through the seas.
  • Sengoku argued that the Uchiha wanted to settle on Origin Island and should not be driven into becoming a pirate force.
  • Sengoku set Uchiha Natsu’s bounty at 3.5 billion Beli and Uchiha Fugaku’s at one billion Beli.
  • Sengoku assigned 320 million Beli bounties to Uchiha Clan members who fought the Navy officers and withheld bounties for ordinary clansmen.

Ch. 94Bounty of 3.5 Billion Beli! The Fifth Emperor of the Sea!

Sengoku issued a 3.5-billion-Beli bounty for Uchiha Natsu and a 10-billion-Beli collective bounty for the Uchiha Clan, naming Natsu the “Void Demon Tamer” and the clan the “Demon-Subduing Ghost Clan.” Morgans exaggerated the Navy’s defeat in a sensational newspaper report, and the story spread across the seas, leaving pirates arguing over whether the West Blue had produced a Fifth Emperor.

  • Sengoku named the Uchiha Clan the “Demon-Subduing Ghost Clan” and Uchiha Natsu the “Void Demon Tamer” on the bounty posters.
  • Morgans saw Natsu’s 3.5-billion-Beli bounty and ordered his informants to gather everything they could about the Uchiha Clan.
  • Morgans exaggerated the reports of the Navy’s losses and Kizaru’s retreat while writing a front-page story.
  • Morgans headlined the article “The Fifth Emperor of the Sea Appears!” and ordered ten million extra copies printed.
  • Newspapers spread across the seas, and pirates debated whether Natsu and the West Blue clan could truly rival the Four Emperors.

Ch. 95Four Emperors! Whitebeard!

Ace learned that Uchiha Natsu had been named the Fifth Emperor and planned to visit Origin Island after dealing with Teach. Natsu called Whitebeard to ask about Haki and discuss Ace, but Whitebeard remained worried about Ace’s pursuit of Teach.

  • Ace read the news of Natsu’s 3.5 billion Beli bounty and new title as the Fifth Emperor.
  • Ace decided to deal with Teach first, then visit Origin Island and share a drink with Natsu.
  • Natsu used the Den Den Mushi Ace had given him to call Whitebeard and ask about training in Armament Haki and Observation Haki.
  • Natsu told Whitebeard that Ace had helped the Uchiha Clan and was stubbornly pursuing Teach despite being warned of the danger.

Ch. 96Marco's Surprise

Natsu recorded Whitebeard’s Haki training advice and planned to add it to the Uchiha Clan’s regimen. On the Moby Dick, Marco learned that Natsu had received a 3.5-billion-Beli bounty after the Navy was defeated, leaving Whitebeard facing the scale of his friend’s power.

  • Whitebeard explained how to train Armament Haki and Observation Haki, warning Natsu that Haki required a strong physical foundation.
  • Natsu wrote down Whitebeard’s methods and planned to distribute them to the Uchiha Clan, expecting its members to develop Haki quickly.
  • Whitebeard worried that Ace had pursued Teach alone and discussed the situation with Marco.
  • Jozu brought the crew a newspaper reporting that Uchiha Natsu had a 3.5-billion-Beli bounty.
  • Marco read that Natsu had wiped out a Navy force and driven Admiral Kizaru to retreat, and Whitebeard studied Natsu’s picture with a grave expression.

Ch. 97Whitebeard's Admiration

Whitebeard learned that Uchiha Natsu had forced Kizaru back without knowing Haki, and he trusted Ace’s judgment of the young pirate. In Wano, Kaido dismissed Natsu as a threat while King remained wary.

  • Whitebeard told Marco that Natsu had called to ask how to train Haki, despite earning a three-and-a-half-billion-Beli bounty and overpowering Kizaru.
  • Marco realized Natsu’s potential could be even more frightening once he learned Haki, but Whitebeard said he trusted Ace’s judgment and would let events unfold.
  • Kaido mocked the news about Natsu, called the fifth Emperor a Marine excuse, and threatened to kill him if he came to Wano.
  • King stayed silent but watched Natsu’s portrait with concern, tightening his grip on his sheath.

Ch. 98Big Mom Pirates

After Big Mom’s hunger-driven rampage in Sweet City subsided, Katakuri showed her a newspaper naming a new 3.5-billion-Beli “fifth Emperor of the Sea.” Katakuri confirmed the Marines’ disastrous West Blue campaign was real, and Big Mom asked what he thought they should do.

  • Big Mom destroyed parts of the banquet hall during a hunger fit until Streusen supplied her with desserts.
  • Katakuri waited for Big Mom to calm down, then handed her a newspaper with a headline announcing a 3.5-billion-Beli “fifth Emperor of the Sea.”
  • Big Mom dismissed the report as Morgans’ exaggeration and called the new Emperor a clown hiding in the Four Blues.
  • Katakuri told Big Mom that Marine spies confirmed the West Blue deployment and described the fleet’s heavy losses, including Onigumo’s severed arm.
  • Big Mom studied the Feihong emblem on the newspaper and asked Katakuri what they should do.

Ch. 99Katakuri's Plan, Charlotte Linlin's Attention

Katakuri persuaded Big Mom to avoid provoking the Demon-Subduing Ghost Clan and let the World Government deal with it. In the West Blue, Natsu shared Whitebeard’s Haki training methods with Fugaku, who began organizing clan-wide instruction.

  • Katakuri advised Big Mom to wait for the World Government to act against the Demon-Subduing Ghost Clan and intervene only if both sides were weakened.
  • Big Mom agreed and asked Katakuri to investigate the clan and invite Uchiha Natsu to a tea party if he proved interesting.
  • Natsu recorded Whitebeard’s instructions on Armament, Observation, and Ryuo, then brought them to Fugaku.
  • Natsu explained how Haki could complement chakra and help the Uchiha Clan counter powerful close-combat fighters and Logia users.
  • Fugaku decided to begin Haki training with the clan’s Jonin and Elite Chunin before teaching ordinary members.

Ch. 100Uchiha Izumi

Natsu reflected on how his bond with Uchiha Izumi had grown through years of grief and hardship, then shared a meal with her and gave her a specially prepared kunai. Izumi examined the engraved weapon, unaware of Natsu’s reason for giving it to her.

  • Natsu recalled how his falling-out with Itachi on Nine-Tails Night had left him and Izumi to grow close after he found her sheltering a kitten amid the fires.
  • Natsu remembered how Izumi brought him food every day after his parents died, quietly supporting him until they became closer.
  • Izumi brought Natsu grilled venison rice, and they teased each other about her early attempts at cooking.
  • After they finished eating together, Natsu gave Izumi a kunai engraved with Flying Thunder God formulae, and she turned it over in her hands.

Ch. 101Leaving Alabasta: An Unexpected Encounter

Natsu secured Origin Island’s defenses before leaving for a few days, while Ace’s search for Teach brought him to Yuba Town, where he unexpectedly reunited with Luffy and the Straw Hat Pirates. Ace warned Luffy about Crocodile and gave him a Den Den Mushi in case he needed help.

  • Natsu gave Izumi a Flying Thunder God Kunai and told her to use it if she was in danger.
  • Natsu placed another Flying Thunder God Kunai in Naka Shrine and told Fugaku he would be away for three to five days.
  • Fugaku said his second Hashirama Cells transplant had stabilized and that he was nearing Super-Kage Level as Origin Island’s defenses strengthened.
  • Ace learned that Teach had headed toward Rainbase and was preparing to leave Yuba Town when Luffy ran into him.
  • Ace introduced himself to the Straw Hat Pirates as Luffy’s brother and warned Luffy to be careful against Crocodile.
  • Ace gave Luffy a black Den Den Mushi so Luffy could call him if he ran into trouble.
Arc 4 of 25
Arc 4 of 25