Chapter Summaries

Tsukasa asked Chen Yu whether he had anticipated Hyoga’s betrayal, and Chen Yu revealed that Hyoga had tried to recruit him. After reflecting on their conflict and eventual unity, the group went to sleep, and the next day Chen Yu, Tsukasa, and Kohaku searched for something special.

• Tsukasa asked Chen Yu whether he had taken precautions against Hyoga, and Chen Yu confirmed that Hyoga had asked him to abandon Tsukasa and join him.
• Chen Yu explained that he had once left the conflict between Tsukasa and Senku to resolve itself, and the group discussed how their divided sides had eventually united.
• Chen Yu compared their united group to the family-linked feudal lords of the Zhou Dynasty, and Senku reproached him for confusing the others with ancient history.
• Tsukasa asked Chen Yu about the statues Taiju and Yuzuriha had carved, but Chen Yu called them art and Tsukasa chose not to press him.
• The next day, Senku and Chrome returned to their research while Chen Yu and Tsukasa searched for something special with Kohaku, who used a picture to help identify it.

Chen Yu, Kohaku, and Tsukasa searched for a plant while the Tsukasa Empire’s people adjusted to peace and joined Ishigami Village. The newcomers began building homes at a separate site as Senku and Chrome rested, leaving the community to settle into its new life.

• Chen Yu encouraged Kohaku to search for the tiny plant using her 11.0 vision while Tsukasa looked on in disbelief.
• Nikki told the Tsukasa Empire’s followers that Chen Yu had defeated Tsukasa, but Hyoga had stabbed Chen Yu before Tsukasa beat Hyoga; Reiko fainted at the news.
• Chrome and Senku admitted they had lost their motivation after the war ended, then fell asleep.
• Kokuyo directed villagers and newcomers from the Tsukasa Empire as they built houses at a separate site for the hundred-plus arrivals.

Chen Yu and the others returned to the village, where he treated the injured before Senku gathered everyone to hear a recording from Byakuya Ishigami. Lilith’s song moved Nikki and Chen Yu, who glimpsed familiar figures and wondered whether bringing the people of that era back would truly ease their regrets.

• Chen Yu and his companions returned to the village, and he reopened his clinic to treat those who had been pricked.
• The villagers brought Reiko, Miwa, and Xiao Xi to help care for the injured, and Chen Yu reprimanded Reiko for mistaking ginseng for pokeweed.
• After night fell, Senku had Kinro and Ginro bring out a gramophone, and Byakuya Ishigami’s recorded message astonished the Tsukasa Empire’s people.
• Lilith’s recorded song brought Nikki to tears and made Chen Yu remember the people he had seen in space.
• Chen Yu glimpsed familiar figures in the crowd and wondered whether bringing back the people from their era would undo their regrets.

After Tsukasa accepted Senku’s side, Chen Yu prepared for combat and joined the group as Senku announced their plan to find the source of the petrification beam. The chapter ended with the Stone World’s Age of Exploration beginning as they set out to build a ship.

• Tsukasa admitted he was convinced, and Chen Yu urged him to spend time with his newly reunited sister.
• Chen Yu inspected the repaired Sword Box and changed into combat gear, startling the Tsukasa Empire fighters.
• Senku explained that they needed to identify the petrification beam’s source on the other side of the Earth.
• Senku announced that everyone would build a ship and begin the Age of Exploration, while Chen Yu considered making a portable compass.

Chen Yu was pulled into Senku’s stage play as the petrification villain, helping inspire the Tsukasa Empire to join a shipbuilding effort. He then sketched elaborate ship designs that Senku judged too ambitious for their time and resources.

• Senku’s troupe cast Chen Yu as the villain behind the Petrification Beam, and Chen Yu improvised a dramatic appearance before vanishing from the stage.
• Chrome rallied the audience to build a ship and confront the villain, and Gen persuaded the Tsukasa Empire to help and join a shipbuilding competition.
• Magma and Yo stepped forward for the competition as Chen Yu, having moved from medical support to combat duty, began sketching ships.
• Chrome and the others gathered to watch Chen Yu draw, and Tsukasa and Senku recognized the first design as resembling a model Senku had made.
• Senku dismissed Chen Yu’s first ship as impractical and his next drawing as beyond their building capacity, then asked him to draw something useful.

Chen Yu carved a wooden ship and accidentally sold it for ten million island dollars, then canceled the sale and evaded the buyer’s attempts to find him. Years later, remembering how the rich young master had made him move repeatedly, Chen Yu snapped a pen and frightened everyone nearby.

• Chen Yu finished a miniature carving, saw news about a young heir buying a ship in a bottle, and decided to carve a wooden ship.
• After a week of work, Chen Yu listed the ship at an absurd deterrent price and posted online asking people to estimate its value.
• A buyer paid ten million island dollars for the ship, so Chen Yu paid a cancellation penalty and rejected the sale.
• The rich young master kept pestering Chen Yu and trying to locate him until Chen Yu threatened to leave, then Chen Yu disappeared from the platform.
• The young master later tracked down Chen Yu’s old address, but Chen Yu had moved and continued moving every six months to avoid danger.
• Back in the present, Chen Yu remembered the ordeal, snapped his pen, and sent the people nearby fleeing in fear.

Tsukasa decided Gen needed physical training after concluding that Chen Yu had become a combatant, while Chen Yu devised a new training aid. After five days of work with Kaseki, Chen Yu brought a wooden device to the Training Ground for Tsukasa, promising similar ones for Kohaku and Magma.

• Tsukasa confronted Gen about his betrayal, then decided to train him because Chen Yu had shifted from medical support to combat.
• Tsukasa dragged Gen away for training, and Gen stopped resisting when he learned Hyoga had once wanted to kill him.
• Chen Yu gathered iron sand and timber and worked with Kaseki to build a wooden training device.
• On the fifth day, Chen Yu brought the finished device to the Training Ground, where Tsukasa hurried over to check on him and inspect it.
• Chen Yu explained that the device was for training and said he would make versions for Kohaku and Magma as well.

Senku’s group searched Nanami Academy for skilled people to revive and found Ryusui Nanami’s cracked statue. Senku revived him, and Ryusui immediately demanded that they find Master Yu.

• Chen Yu finished equipment for the melee fighters, then joined the shipbuilding effort.
• Senku, North East West South, and the others reached Nanami Academy and dug up dozens of statues while searching for experts.
• North East West South recognized a cracked statue as Ryusui Nanami and explained his privileged background and sailing experience.
• Despite North East West South’s objections, Senku poured Revival Fluid over Ryusui’s statue.
• Ryusui revived unharmed and immediately told everyone to find Master Yu.

Chen Yu learned that Ryusui had been searching for him as a woodcarving master and discovered that Ryusui had once forced their group to move. The chapter left Chen Yu calling Tsukasa over to confront Ryusui about it.

• Ryusui called Chen Yu “Master Yu” and asked for two ships in bottles each month in exchange for helping the group.
• Chen Yu confronted Senku for promising Ryusui the carvings, then made Senku fall asleep so he could rest.
• Kohaku carried Senku to rest, and Ruri and the other girls joined her, sharing a rare peaceful sleep.
• Chen Yu drew a symbol for Ryusui, who recognized it as proof that Chen Yu was the master he had been seeking.
• Chen Yu realized Ryusui had been the one forcing the group to move and called Tsukasa over to confront him.

Chen Yu left Tsukasa to confront Ryusui and resumed preparing stone statues for the Treasure Island battle. On Treasure Island, Ibara schemed to silence a physician whose daily visits threatened to expose the chief’s petrification, while the physician and a girl worried about the chief’s behavior and next year’s selection.

• Chen Yu rejected Ryusui’s offer of money, then let Tsukasa take him away to discuss the events of thousands of years ago.
• Yuzuriha and Taiju showed Chen Yu the stone statues they had made, but he found their blank expressions unsuitable for deceiving Ibara on Treasure Island.
• A physician visited the king’s bedchamber with medicine, and Ibara watched him while hiding the petrified chief and plotting to get rid of him.
• The physician returned home to a girl repairing bows, and they discussed the chief’s disappearance from public life and the coming selection of consorts.

A nineteen-year-old island doctor recalled the chief’s story that someone from the land where medicinal herbs originated would come, marked by a five-pointed star on the left side of his face. He remained on the island, waiting for the Divine Doctor to arrive.

• The young man woke after his sister left to hear the chief's stories and checked the room where he kept dried bark and withered leaves.
• He remembered the chief’s instructions to recognize a visitor by a five-pointed star marking on the left side of his face.
• He recalled choosing to become a doctor like the traveling healer in the chief’s story and studying medicinal herbs under the chief.
• At nineteen, the young man had become the island’s renowned doctor and discovered previously unknown herbs.
• The young man looked out the window and said he would wait for the Divine Doctor.

Ryusui told Tsukasa how he built his own company and tried to treat his workers fairly, while Tsukasa recounted the hardships he and his sister faced and how Chen Yu helped them. As the conversation ended, Tsukasa recalled Chen Yu’s advice against striking first and eyed the newly revived Ryusui with unsettling curiosity, while a girl hiding nearby recognized Tsukasa as someone she had sensed beside her while she slept.

• Ryusui told Tsukasa how he started a small company, brought his former bodyguards and butler with him, and worked to provide for them.
• Tsukasa described caring for his hospitalized sister, enduring poverty and abuse, and being attacked when he went to collect seashells for her.
• Tsukasa explained that Chen Yu helped him financially, encouraged him to learn boxing, and supported him and his sister over the years.
• Tsukasa remembered Chen Yu’s warning not to hurt others first and wondered whether killing someone who could be revived counted as murder.
• Tsukasa looked at Ryusui with interest in whether he could be revived again, making Ryusui feel a chill.
• A girl hiding in the grass recognized Tsukasa as the person she had sensed sitting beside her while she slept.

Chen Yu introduced Ryusui to the people working on Tsukasa’s island and told him to get a medical checkup. Ryusui embraced his role as captain and resolved to revive Francois.

• Mirai joined Tsukasa, and he returned to help the others while Ryusui stayed behind, unsure where he fit in.
• Chen Yu gave Ryusui a captain’s hat, explained the clinic, and invited him to meet the island’s crew.
• Chen Yu introduced Ryusui to Senku, Ruri, Kohaku, Magma, Nikki, Taiju, Kinro, Ginro, Yuzuriha, Chrome, Kaseki, Ukyo, and Gen Asagiri, describing their skills and roles.
• Chen Yu said he would prepare a chart for Ryusui and reminded him to come for a checkup the next day.
• Ryusui recalled being told that people would follow their captain and vowed to revive Francois.

After waking early, Senku revised his construction plans while Chen Yu wondered why his medical skills had become less useful. Chen Yu teased Janette and Saphia about marriage, then suggested Tsukasa as a match; the chapter ended with an author’s note about pausing or ending the story’s first part until the next arc.

• Senku woke at four, left the sleeping Ryusui behind, and revised his construction draft until the others got up.
• Yuzuriha asked Chen Yu what was troubling him, and he reflected on how little his medical skills had been needed after the petrification.
• Chen Yu told Ruby, Ruri, and the others that he had studied medicine since he was three and estimated that he was seventeen.
• Chen Yu asked Janette and Saphia why they were unmarried, and they admitted they preferred skilled hunters and handsome boys.
• Chen Yu suggested Tsukasa met both girls’ standards and privately worried that Tsukasa might have no family left if they returned to modern society.

Chen Yu checked on Ryusui and later met Francois, who asked to learn his cooking. As the ship was completed and the group found oil, Chen Yu prepared equipment for the journey ahead, leaving the story paused before the Treasure Island arc.

• Chen Yu visited Ryusui, confirmed that he had been examined, and urged him to exercise more.
• After Francois was revived, Francois recognized Chen Yu’s cooking and asked to study under him.
• Chen Yu asked Francois to prepare something tasty so he could judge Francois’s cooking.
• The ship was completed and the group found oil, improving their living conditions and equipment under Chen Yu and Senku’s leadership.
• Chen Yu made light armor for Tsukasa, Kohaku, and others, along with flintlocks for future use.

Chen Yu prepared weapons and supplies for the expedition to Treasure Island while training the group and warning others about a coming petrification light. As preparations neared completion, he hoped the team could reach America quickly and confront the danger ahead.

• Chen Yu inspected the weapons, armor, and supplies he had prepared and reflected on how much his strength had grown.
• Tsukasa pushed Gen Asagiri to train harder, while Kohaku beat Ginro nearby.
• Chen Yu assessed the group's progress, noting Kohaku, Kinro, and Ukyo's improvements and Senku's failure to gain strength.
• Chen Yu warned Ruri, North East West South, and others to find shelter and protect themselves if a light crossed the sky.
• Chen Yu considered the approaching final petrification light, worried about Suika's future, and noted that the firearms were nearly finished.

Chen Yu checked on the tribe’s fighters and discussed their preparations with Tsukasa. The chapter ended with Tsukasa challenging Chen Yu to a proper sparring match.

• Chen Yu reflected on the tribe members’ progress and noted that Hyoga still needed a push from Treasure Island before he would rejoin them.
• At the training grounds, Gen welcomed a break from Tsukasa’s training and teased Ginro, who was forced by Kohaku to keep training.
• Chen Yu told Tsukasa that he wanted to minimize casualties because the trainees would be their main fighting force.
• Tsukasa said he trusted Chen Yu and invited him to spar, and Chen Yu agreed to take the opportunity for a proper match.

Tsukasa Shishio and Chen Yu held a sparring match to demonstrate practical close-combat techniques and test Tsukasa’s progress. Their fight ended with both exhausted and the spectators stunned, while Reiko cheered for more.

• Chen Yu told the gathered fighters that the sparring match would teach practical combat moves.
• Tsukasa confirmed he had learned Chen Yu’s defensive technique and asked him to fight at full strength.
• Chen Yu used qi, astonishing the spectators with his speed and power and sending a powerful gust toward them with a palm thrust.
• Tsukasa and Chen Yu exchanged punches, kicks, blocks, and counters until both were thoroughly exhausted.
• The spectators stared in amazement at their strength, while Reiko enthusiastically cheered.