Chapter Summaries

Yui discovered that she had gained all five chakra natures and learned the Spirit Transformation Technique, then went north through Shikkotsu Forest to find Shobue. There, she found Shobue watching an immense rift with a blue, seemingly shattered mirror at its bottom.

• Yui tested her chakra and found that the Chakra Paper showed wind, lightning, fire, earth, and water natures.
• Yui used the Spirit Transformation Technique and confirmed that she could leave her body as a soul.
• Yui returned to the cabin, learned from Katsuyu that Shobue had gone north, and headed into the forbidden area.
• Yui found Shobue in a barren region filled with scarlet mist, where Shobue directed her attention to an enormous rift.
• Yui saw a deep blue mirror at the bottom of the rift that looked as though it was about to shatter.

Yui and Shobue discovered that the shattered blue mirror had revealed Yomotsu Hirasaka, a passage to the Land of the Underworld watched over by the Three Great Sage Lands. After the passage closed, Shobue noticed that the Caged Bird Seal had vanished from Yui’s forehead, and Yui hurried back with her to begin Sage Mode training.

• The blue mirror shattered, revealing a black abyss that Shobue identified as Yomotsu Hirasaka, the passage to the Land of the Underworld.
• Shobue explained that the Three Great Sage Lands guarded their passages, which opened once every thirty years to keep ghosts and monsters from entering the living world.
• Yui sensed a space-time fluctuation from Yomotsu Hirasaka and considered whether its power could help her learn the related Ninjutsu.
• Shobue noticed that Yui’s skin looked more radiant and the last trace of her Caged Bird Seal had disappeared.
• Yui told Shobue she had already learned the Spirit Transformation Technique and rushed with her to begin Sage Mode training.

Yui trained at the Giant Lake to absorb natural energy and successfully mastered Sage Mode after struggling against the lake’s resistance. When she emerged with new horns, Shobue was stunned by how much Yui looked like someone she knew.

• Yui meditated beneath the lake and held Sage Mode for nine seconds using her own Mental Energy.
• Yui used the Spirit Transformation Technique to sense the lake’s natural energy, but the lake water repeatedly pushed her soul away.
• Yui persisted in a standoff with the lake until its water stopped resisting, then absorbed natural energy into her soul.
• Yui returned to her body and converted the energy, awakening Sage Mode as horns emerged from her forehead.
• Yui told Shobue that she had mastered Sage Mode, and Shobue stared at her, saying she looked so much like her.

Yui learned Sage Mode, but discovered that it had given her a pair of horns and caused a brief bout of intense forehead pain. Shobue planned to teach her senjutsu techniques before they tried to awaken Nai Hyuga.

• Yui noticed Shobue staring at her and realized she had not put on her outer clothes.
• Shobue pointed out that Yui’s forehead had changed, and Yui discovered two hard, grayish-white horns.
• Yui examined her Sage Mode appearance and worried that she might be reverting to an Otsutsuki.
• Shobue said the horns were not a feature of Shikkotsu Forest’s Sage Mode and told Yui to master senjutsu before awakening Nai Hyuga.
• Yui’s forehead suddenly hurt as Sage Mode wore off, but the pain soon passed and the horns remained.
• Shobue confirmed that Yui had maintained Sage Mode for thirteen minutes, and Yui told her they could go.

Yui spent a year mastering Shikkotsu Forest senjutsu and prepared to perform the final step needed to awaken Nai Hyuga. Tsunade arrived just as Yui was about to enter the cave, and noticed her mask and newfound power.

• Shobue gave Yui a wooden box containing offensive senjutsu, which Yui could read only in Sage Mode, then led her to learn the healing senjutsu needed for Nai Hyuga.
• Yui struggled through a year of training and mastered Shikkotsu Forest's white slug and blue slug senjutsu while improving her Sage Mode.
• Yui prepared to enter the cave where Shobue was waiting for the final step to awaken Nai Hyuga.
• Tsunade arrived breathless, and Yui put on her copper-colored mask before turning to meet her.
• Tsunade saw Yui's mask and sensed the powerful presence she had developed.

Tsunade showed Yui the Strength of a Hundred Technique she had developed and gave her a scroll before returning to Konoha. Yui then entered Nai Hyuga’s mind to try to wake her, and found herself in an unfamiliar place.

• Tsunade demonstrated the Strength of a Hundred Technique and explained its healing and youth-preserving effects.
• Tsunade gave Yui a scroll of the technique and left for Konoha.
• Yui returned to the cave, where Shobue explained that she needed to enter Nai Hyuga’s sealed mind to awaken her.
• Yui used mental healing ninjutsu infused with senjutsu chakra on Nai Hyuga while Shobue surrounded them with green mist.
• Yui opened her eyes inside Nai Hyuga’s mental world and heard a middle-aged woman complain that she was blocking the way.

Yui entered Nai Hyuga’s mental space and found the Hyuga Clan Compound in ruins, where Nai was attacking the dead Hyuga Feng. Yui tried to reach Nai, but Nai mistook her for Hyuga Feng’s accomplice and attacked her, draining her chakra as Yui shouted her identity.

• Yui arrived in Konoha and headed to the Hyuga Clan Compound, believing Nai was there.
• Yui found the compound devastated and followed a familiar voice deeper into the ruins.
• Yui saw Nai repeatedly stabbing the already-dead Hyuga Feng while asking where Yui was.
• Yui accidentally collapsed the door, and Nai mistook her for Hyuga Feng’s lackey and threw kunai at her.
• Yui dodged Nai’s attack with the Body Flicker Technique, but Nai drained her chakra and attacked again.
• Yui called out that she was Yui Hyuga.

Yui reached Nai Hyuga inside her mental world and tried to bring her back, but Nai resisted because she feared facing the outside world. After Yui reassured and kissed her, Nai agreed to leave with her.

• Yui called to Nai Hyuga until Nai recognized her, dropped her kunai, and embraced her in tears.
• Nai asked how Yui had entered her mental world, then refused to leave because she saw the outside world as filthy and threatening.
• Nai transformed the surroundings into a Konoha Ninja Academy classroom filled with their childhood classmates, but could not imagine Yui there.
• As Yui began to fade, Nai thanked her and started disappearing, but Yui caught her and asked her to return because she missed and wanted to protect her.
• Yui kissed Nai, and after remembering their childhood and hearing Yui’s promise to face the outside world together, Nai agreed to go with her.

Yui escaped the strange space and found Nai Hyuga awakening on the Ice Bed, then told her that Hyuga Feng and Ikuko Hyuga were dead. Nai chose Ikuko Hyuga’s Byakugan eye, and Yui stopped her from inserting it herself so she could help.

• Yui vanished from the space after Nai Hyuga promised to follow her, and Nai broke the space apart to escape.
• Yui awakened, gathered clothes and jars containing Byakugan eyes, and heard Nai Hyuga call for her.
• Yui caught Nai Hyuga as she toppled from the Ice Bed, and Nai embraced her.
• Yui explained that Hyuga Feng and Ikuko Hyuga were dead, and Nai thanked Yui for avenging her.
• Nai rejected her original Byakugan eyes and chose Ikuko Hyuga’s eye, but Yui caught her hand and offered to help.

Yui used Sage Art: Regenerative Creation to restore Nai Hyuga’s missing eye, though it grew back as an ordinary reddish-brown eye rather than a Byakugan. As night fell, Yui helped Nai leave the cave to meet her friends.

• Yui restored Nai Hyuga’s damaged eye socket with a Byakugan, giving her blurry vision in one eye.
• Nai dressed in a robe and saw Yui’s unfamiliar appearance, including her horns and golden eyes.
• Yui used Sage Art: Regenerative Creation to grow Nai a second eye, which appeared ordinary rather than as a Byakugan.
• Nai thanked Yui and resolved to become stronger, while Yui gathered the crystal bottles and left the inferior Tenseigan behind.
• Yui supported the unsteady Nai out of the cave as Xiao You and Shobue waited outside and speculated about their delay.

Yui introduced Nai Hyuga to Shobue and Xiao You in Shikkotsu Forest, while Tsunade returned to Konoha without learning Sage Mode. Mito announced that she was going to the Land of Whirlpools to find the next Nine-Tails Jinchuriki because she did not have much time left.

• Yui brought Nai Hyuga out of the cave and introduced her to Shobue and Xiao You.
• Shobue suggested the group return to her house as night fell, and Yui and Nai agreed.
• Tsunade returned to Konoha and told Hiruzen Sarutobi she had failed to learn Sage Mode but had improved her Medical Ninjutsu.
• Tsunade concealed Yui Hyuga’s presence in Shikkotsu Forest and claimed Katsuyu had guided her in developing Ninjutsu.
• Mito Uzumaki arrived at the Hokage’s office and announced she would go to the Land of Whirlpools to find the next Nine-Tails Jinchuriki.

Mito decided to travel to the Land of Whirlpools to choose the next Nine-Tails Jinchuriki, with Tsunade accompanying her and Root assigned to provide protection. Jiraiya told Tsunade he was leaving to investigate a prophecy of world-ending upheaval, and she sent him off with a warning not to die.

• Mito announced she would leave in three days to choose the next Nine-Tails Jinchuriki, and Hiruzen agreed to send ANBU protection.
• Tsunade insisted on accompanying Mito, and Hiruzen approved her request.
• Danzo persuaded Hiruzen to assign Root to protect Mito, while Hiruzen warned him not to scheme against her.
• Jiraiya told Tsunade he planned to travel the Shinobi World after receiving a prophecy that his student would save it from a coming disaster.
• Tsunade told Jiraiya not to die, and he laughed as he promised he would survive.

After recovering in Shikkotsu Forest, Nai Hyuga insisted on accompanying Yui on a trip to the Land of Iron and the Land of Whirlpools. Katsuyu summoned them out of the forest, and Yui carried Nai into the sky, leaving her frightened by the flight.

• Nai Hyuga mourned as Yui cut her waist-length hair to shoulder length.
• Nai insisted on joining Yui, and Yui agreed to take her along to collect a ninja blade in the Land of Iron and seek sealing jutsu in the Land of Whirlpools.
• Yui and Nai left Shikkotsu Forest with Shobue's help, arriving in a grove after Katsuyu summoned them.
• Yui gave Nai a silver mask to conceal her identity.
• Yui swept Nai into a bridal carry and lifted them into the sky, alarming Nai.

Yui and Nai traveled to the Land of Iron so Yui could collect a commissioned Samurai Sword, but they found Iron City barred ninjas from entering. Yui proved her swordsmanship to the gate guard, who mistook her for a Swordmaster.

• Yui apologized to Nai for startling her during their earlier flight, and Nai forgave her.
• Yui explained the Shinobi World's countries and villages to Nai, then carried her through the night toward the Land of Iron.
• Nai woke during the flight, and Yui warmed her as they neared Iron City.
• At the city gate, a samurai guard told Yui and Nai that ninjas were forbidden from entering by the general's orders.
• Yui claimed she was not a ninja and cut down a tree with Wave Breaker, convincing the guard that she was a samurai.
• The guard asked whether Yui was a Swordmaster, and Yui admitted she did not know what that meant.

Yui learned about samurai ranks and the reason Iron City had banned ninja from entering. After entering the city, she headed with Nai Hyuga to register as a samurai and inspect the blade being forged for her.

• The gate guard explained that blade energy marked a Swordmaster, and that Iron City had only twelve Swordmasters and one Sword Saint.
• The guard told Yui that the general had banned ninja from Iron City to protect two Peerless Famous Blades being forged by Master Iinaka and more than fifty swordsmiths.
• Yui realized one of the blades was hers and learned it would take a few more days to finish.
• Yui and Nai Hyuga entered Iron City, and the guard called after them to register at the Samurai Registration Office on 20 Second Street.
• Yui decided to register their samurai ranks, and she and Nai Hyuga headed for 20 Second Street.

Yui and Nai Hyuga reached the Samurai Rank Registration Office, where Yui proved she was a Swordmaster and received official recognition from Iron City. The registrar then asked whether Nai wanted to be tested as well.

• Yui and Nai Hyuga found the registration office closed, but a scrawny samurai opened the door as they turned to leave and invited them inside.
• The scrawny samurai explained that samurai from the Land of Iron usually registered as apprentices, then set up a wooden-post test for the visitors.
• Yui used a wooden sword to cut through dozens of posts with sword energy, leaving the registrar astonished that she was a Swordmaster.
• The registrar filled out Yui's information and gave her a Swordmaster Token recognizing her as a samurai of Iron City.
• The registrar asked Nai Hyuga whether she wanted to have her samurai rank tested.

Yui and Nai Hyuga left the samurai registration building and went to an inn, where Yui remembered a wooden box Shobue had given her and prepared to open it. After Nai began training to improve her strength, Yui opened the box and saw something unexpected inside.

• Yui and Nai Hyuga left the registration building, and the scrawny samurai decided to report the Swordmaster's arrival to the general.
• Yui remembered the wooden box Shobue had given her before she began practicing Senjutsu and took Nai to an inn.
• The inn had only one room available, so Yui booked it for five days and paid one hundred ryo.
• Nai realized she could try developing powerful Ninjutsu to grow stronger and began working on her chakra control while Yui meditated.
• Yui opened the wooden box sealed in her scroll and stared in surprise at its contents.

Yui used Sage Mode and the Byakugan to read the ancient scroll, discovering a Sage Art that could resurrect the dead with the blood of a god. After putting the scroll away, she found Nai Hyuga unconscious and covered in frost, and began warming her with Fire Release chakra.

• Yui discovered that the ancient scroll became weightless inside its Wooden Box and appeared blank until she viewed it with the Byakugan.
• Yui used Sage Mode to read the scroll and found the Sage Art: Rinne Revival Technique, which could restore life to the departed using the blood of a god.
• Yui wondered about the technique’s requirements and why Shobue had described the Senjutsu as offensive, then sealed the scroll away.
• Yui noticed a sudden chill and found Nai Hyuga unconscious in a corner with frost forming on her mask.
• Yui warmed Nai with Fire Release chakra, checked her vital signs, and waited for her to wake up.

Yui discovered that Nai Hyuga had accidentally combined wind and water chakra to develop Ice Release, then offered to teach her the Strength of a Hundred Technique. They began considering how to grow stronger together while staying in the Land of Iron.

• Yui realized the frost and chakra resistance in Nai Hyuga's body indicated that she had awakened Ice Release.
• After waking, Nai Hyuga released chakra and formed a shard of ice in her palm.
• Yui explained kekkei genkai to Nai Hyuga, who said she had mixed wind into her water release while trying to develop a stronger ninjutsu.
• Nai Hyuga admitted she had experimented because she wanted to catch up to Yui, and Yui reassured her that she could ask for help.
• Yui showed Nai Hyuga a scroll for Tsunade's S-rank Strength of a Hundred Technique and described its healing and chakra-enhancing effects.

Yui studied the Yin Seal with Nai and considered whether it could store senjutsu chakra for instant Sage Mode. In Iron City, the general agreed to Rengo’s plot to trap Swordmasters near Iinaka’s blades, while Mifune recalled how the general had publicized their forging; the plan around the blades remained unresolved.

• Yui recognized Tsunade’s strength, agreed to learn the Yin Seal from Yui, and considered storing senjutsu chakra inside it.
• Kota told the general that a Swordmaster had arrived in Iron City to register, and the general dismissed his concerns.
• Rengo urged the general to eliminate the Swordmasters and claim Iinaka’s two Peerless Famous Blades, and the general agreed to set traps when the blades were finished.
• At an inn, Mifune recalled that Iinaka had planned to forge one blade for a friend and one for the general, before the general summoned craftsmen and spread word of the blades.