by Mushoku Tensei: Jobless Reincarnation Season 3 Episode 13, “The Diary,” has finally arrived—and it is one of the darkest and most emotionally devastating episodes of the anime so far. The episode brings Old Rudeus’s horrifying future to life, showing what could happen to Roxy, Sylphiette, Eris, and the rest of Rudeus’s family if he follows the wrong path.
The latest episode of ** Mushoku Tensei III: Jobless Reincarnation ** aired in Japan on September 20, 2026, and immediately triggered a massive reaction from viewers.
The episode had been heavily anticipated ever since the mysterious Old Rudeus appeared and warned the present-day Rudeus about a disastrous future. Rather than simply explaining what happened, Episode 13 actually visualizes the events recorded in Old Rudeus’s diary, turning his horrifying memories into a full episode of animation.
The result was an episode filled with death, regret, guilt,t and despair.
Viewers reacted with comments such as “It’s finally here,” “I thought my heart was going to burst,” “This is brutal,” and “I’m so glad they animated this.” Japanese anime coverage also highlighted the intense response to the episode and the decision to bring the diary material to the screen.
Warning: Major spoilers for Mushoku Tensei III Episode 13 follow.
Mushoku Tensei Season 3 Episode 13: “The Diary”
Episode 13 is titled “The Diary” and adapts the horrifying future described by the older version of Rudeus.
The official premise is simple but disturbing: after opening the diary left behind by his future self, Rudeus learns about the devastating life Old Rudeus experienced after making a series of choices that ultimately led to the deaths of the people he loved.
The official preview specifically described the episode as the story of the brutal life that future Rudeus experienced, beginning with Roxy’s death.
For viewers who only watch the anime, this is particularly important because Episode 12 ended with Old Rudeus arriving in the present and desperately warning his younger self.
His message was not simply:
“Hitogami is evil.”
Instead, he gave Rudeus specific instructions, including:
- Consult Nanahoshi.
- Be suspicious of Hitogami.
- Do not immediately become his enemy.
- Send a letter to Eris.
- Most importantly, avoid repeating the decisions that led to the future described in the diary.
The diary episode then shows exactly why Old Rudeus was so desperate to change the past.
The Horror Begins With Roxy
The episode begins by showing the future that Old Rudeus experienced.
At first, everything seems relatively normal.
Rudeus is living with his family, and the household appears peaceful. However, that sense of security quickly disappears when a strange animal is discovered dead near the house.
Soon afterward, Roxy becomes seriously ill.
Cliff examines her condition and identifies it as Magic Stone Disease, an extremely dangerous illness that causes the victim’s body to gradually transform into magical stone.
For Rudeus, this is the beginning of the nightmare.
The family tries to find a way to save Roxy, but ordinary healing methods are not enough. The only possible solution involves obtaining extremely powerful healing knowledge from the Holy Kingdom of Millis.
This forces Rudeus, Cli,ff and Zanoba to undertake a dangerous journey.
Viewers immediately understood what was happening.
The future that Old Rudeus had described in Episode 12 was no longer just dialogue.
The anime was actually showing it.
Japanese viewers reacted with comments such as:
“They are really visualizing the diary.”
“It’s gruesome from the beginning.”
“Instead of reading the book, we’re watching the future.”
These reactions were widely shared after the broadcast.
Rudeus Travels to Save Roxy
Determined to save Roxy, Rudeus travels with Cliff and Zanoba to obtain the information necessary to treat her illness.
The journey becomes increasingly dangerous.
Although the group succeeds in obtaining the knowledge they need, they are attacked on the way back.
Cliff is seriously injured.
The situation becomes one of the defining tragedies of Old Rudeus’s life.
For the first time, Rudeus is forced into a situation where survival requires him to kill another person.
But the tragedy does not stop there.
Cliff dies.
For Rudeus, the loss is devastating.
Cliff was not simply another adventurer. He was a close friend and someone who had repeatedly supported Rudeus and his family.
The death also demonstrates an important theme of the diary:
Every tragedy creates another tragedy.
Rudeus does not simply lose one person and recover.
Instead, each loss changes his personality and pushes him toward increasingly destructive decisions.
That is what makes Old Rudeus’s future so frightening.
Rudeus Returns Home Too Late
After the disastrous journey, Rudeus and Zanoba finally return home.
But the situation is already beyond saving.
Roxy is dead.
The woman Rudeus had desperately tried to save is gone.
For viewers who already knew the broad outline of the diary from the previous episode, the moment was still painful to watch because the anime finally showed the events rather than simply describing them.
Fans reacted emotionally to Roxy’s death, with comments including:
- “Roxy is gone.”
- “I knew it would happen, but this episode is still incredibly hard.”
- “This is too brutal.”
- “I wasn’t prepared to see this animated.”
The episode’s presentation made the tragedy feel even more immediate.
The audience is not merely told that Roxy died.
They watch Rudeus lose the person he tried everything to save.
Rudeus Begins to Collapse
Roxy’s death destroys Rudeus emotionally.
Instead of recovering with the support of the people around him, he begins to sink into despair.
He turns to alcohol, using it as a way to escape his grief.
This is one of the most important parts of the episode because it shows how Old Rudeus gradually becomes a very different person from the Rudeus viewers have followed throughout the series.
The tragedy is not simply that Rudeus loses his loved ones.
It is that his response to those losses causes him to lose even more people.
Eventually, he spends the night with another woman.
And that decision has devastating consequences.
Sylphiette Sees Rudeus at His Lowest Point
Sylphiette, Rudeus’s wife, discovers what has happened.
Her emotional reaction is heartbreaking.
She asks, in despair, essentially:
“Why am I not enough?”
It is one of the most painful moments in the episode because Sylphiette has spent much of her life caring for Rudeus and supporting him.
Instead of communicating with her, Rudeus has become trapped inside his own grief.
Sylphiette eventually leaves.
She travels with Ariel, who is involved in the political struggle surrounding the Asura Kingdom.
This becomes another major turning point in Old Rudeus’s future.
Sylphiette’s Tragic Fate
Sylphiette’s future becomes increasingly dangerous because of Ariel’s political position.
Ariel is involved in the struggle for power in the Asura Kingdom, and her enemies eventually gain the upper hand.
The result is catastrophic.
Sylphiette is executed alongside Ariel’s faction.
Rudeus eventually learns what happened and is consumed by rage.
The man who had already lost Roxy now loses Sylphiette as well.
His grief transforms into hatred.
And rather than processing his pain, he begins to destroy everything around him.
Old Rudeus Burns With Revenge
After Sylphiette’s death, Rudeus’s emotional collapse becomes even more severe.
His drinking worsens.
The people around him begin to leave.
Members of his household who had once supported him can no longer remain with him.
This is one of the episode’s most disturbing ideas:
Rudeus is surrounded by people who love him, but his grief gradually pushes them away.
The tragedy is therefore not only caused by external enemies.
His own decisions become part of the disaster.
This distinction is important when understanding the episode.
Although Hitogami manipulates events and later takes responsibility for Roxy’s death, the diary also shows that Old Rudeus makes terrible choices himself.
That is why his future is presented as a warning rather than simply a prophecy.
What Happens to Nanahoshi?
Nanahoshi’s fate is another dark part of Old Rudeus’s timeline.
The episode leaves certain details intentionally ambiguous, and viewers have debated how exactly to interpret what happens to her.
This is an important distinction because some online reactions describe her fate as definitively confirmed suicide, while the episode’s presentation does not provide the same straightforward confirmation for every detail.
Rather than treating every fan interpretation as official information, it is safer to say that Nanahoshi’s situation becomes another part of the devastating collapse of Old Rudeus’s world.
The uncertainty itself adds to the disturbing atmosphere of the diary.
Hitogami Finally Reveals His Role
Then comes one of the episode’s most shocking scenes.
Hitogami returns.
The mysterious figure who has repeatedly appeared in Rudeus’s dreams and offered him advice now reveals a horrifying truth.
Hitogami tells Rudeus that he was responsible for the chain of events that led to Roxy’s death.
His attitude makes the revelation even more disturbing.
Rather than showing remorse, Hitogami treats the tragedy almost like a game.
For Rudeus, this becomes the final confirmation that Hitogami is connected to the nightmare that destroyed his life.
Viewers immediately reacted with anger.
Comments included:
- “Hitogami!”
- “So he really was behind Roxy’s death.”
- “I can’t believe he said that so casually.”
- “This is where everything finally makes sense.”
The episode transforms Hitogami from a mysterious adviser into an increasingly direct enemy in Rudeus’s eyes.
Hitogami Reveals That Roxy Was Pregnant
One of the cruelest details comes when Hitogami reveals that Roxy was pregnant when she died.
The revelation makes Rudeus’s grief even more devastating.
It also explains why Hitogami’s manipulation has such enormous consequences.
Rudeus did not simply lose Roxy.
He lost the possibility of another child and another future with her.
Hitogami then leaves Rudeus with his anger and despair.
At this point, Rudeus makes a decision:
He will find Hitogami and kill him.
But before he can achieve that goal, the consequences of his past decisions continue to catch up with him.
Eris Returns to Rudeus’s Life
Another major character appears in Old Rudeus’s future:
Eris Greyrat.
Eris has spent years training in the Holy Land of Swords and has become an extremely powerful swordswoman.
However, her relationship with Rudeus remains complicated because of the painful misunderstanding surrounding their earlier separation.
When she returns, Rudeus does not immediately understand her feelings.
Instead, he treats her with suspicion and hostility.
This becomes one of the most heartbreaking elements of the diary.
Eris still cares deeply about Rudeus.
But Rudeus is too consumed by grief, anger, and paranoia to recognize it.
Eris Protects Rudeus to the End
Rudeus eventually confronts Atoferatofe Ryback, also known as Atofe, while trying to gather information connected to Hitogami.
Despite Rudeus’s increased power, he is placed in an extremely dangerous situation.
Eris intervenes.
She protects him.
And ultimately, she sacrifices herself.
The scene is especially painful because Eris has spent years training precisely so that she could become strong enough to stand beside Rudeus.
She finally reaches that point—but Rudeus realizes what she truly wanted only when it is too late.
Eris had never stopped caring about him.
Sword King Ghislaine Dedoldia later explains Eris’s feelings, telling Rudeus that the young woman simply wanted to be by his side.
That realization destroys him.
He finally understands Eris.
But he has lost her.
Rudeus Loses Almost Everyone
By this stage of the diary, Old Rudeus has lost nearly everyone who mattered to him.
Roxy is dead.
Sylphiette is gone.
Cliff is dead.
Eris has sacrificed herself.
Other members of his household have disappeared from his life.
The future Rudeus,s who once wanted to protect his family, ly has become an isolated, bitter,ter and broken man.
This is why Episode 13 is more than a sequence of shocking deaths.
It is a story about regret.
The episode asks what would happen if Rudeus made a series of choices that gradually pushed him away from the people who loved him.
The answer is devastating.
Old Rudeus’s Final Decision
Old Rudeus eventually grows old.
His hatred for Hitogami remains, but the anger that once consumed him has faded with time.
He knows he does not have much time left.
Instead of simply accepting his fate, however, he makes one final attempt to change history.
He travels back to the past.
This is the Rudeus who appears before the younger Rudeus in Episode 12.
He does not travel back simply because he wants revenge.
He wants to prevent his younger self from repeating his mistakes.
That is why his warning is so important.
Old Rudeus knows exactly what happens if the present Rudeus makes the wrong choices.
The Final Moments of the Diary
One of the episode’s most emotional sequences comes near Old Rudeus’s death.
After years of suffering, he is finally able to see the people he lost in the form of memories and visions.
The anime uses these final images to emphasize the contrast between the miserable future he experienced and the possibility of a different future for the younger Rudeus.
This is also one of the anime’s most notable additions in terms of presentation.
Fans praised the decision to visualize material that could otherwise have remained mostly narration, saying that the anime adaptation gave the diary an emotional impact that was difficult to achieve through explanation alone.
One viewer described the episode as giving Old Rudeus’s character greater depth, while others praised the direction, animation, and emotional performances.
Why Episode 13 Was So Difficult to Watch
The episode is structured differently from a conventional anime story.
Normally, viewers follow a character through events in chronological order.
“The Diary” instead presents an alternate future through a series of memories and diary entries.
The story moves rapidly from one tragedy to another.
That structure is intentional.
It makes viewers experience the future almost as Old Rudeus experienced it: as a chain of events that became increasingly difficult to stop.
The official episode synopsis describes it as the future Rudeus’s devastating life beginning with Roxy’s death.
The result is a story where the audience already knows that this is not necessarily the future of the current Rudeus.
Yet that does not make it less painful.
Instead, it raises another question:
Can the present Rudeus avoid this future?
Is This Future Guaranteed to Happen?
For anime-only viewers, this is one of the most important questions after Episode 13.
No—the episode should not be interpreted as proof that all of these events will definitely happen in the current timeline.
Old Rudeus has already traveled back and warned his younger self.
That intervention creates the possibility of a different outcome.
In fact, the entire reason Old Rudeus went back in time was to prevent his younger self from repeating the decisions that led to his disastrous life.
Therefore, the events shown in “The Diary” function primarily as a warning and possible future, rather than a simple statement that Roxy, Sylphiett,e and Eris are destined to die in the current timeline.
This distinction is extremely important for new viewers.
Fans Praise the Anime’s Adaptation of the Diary
After the episode aired, social media was flooded with emotional reactions.
Some fans said they were devastated by the episode, while others praised the anime staff for adapting material that many viewers had wondered whether the anime would actually show.
Comments included:
- “I thought my heart was going to burst.”
- “I’m so glad they animated it.”
- “This episode was incredible, but I never want to watch it again.”
- “The anime staff went all out.”
- “The diary was even more painful when animated.”
Reddit discussions similarly praised the episode’s emotional direction and its handling of Old Rudeus’s story, with some viewers calling it one of the strongest episodes of the season.
Some viewers also praised the decision to make the diary feel like a fragmented sequence of memories rather than a straightforward retelling.
Others felt that the amount of tragedy packed into a single episode was overwhelming.
These are viewer reactions, however, rather than official assessments of the episode.
Yumi Uchiyama Reacts to Episode 13
Yumi Uchiyama, the Japanese voice actress for Rudeus, also commented after the broadcast.
She wrote that she was still processing the episode and praised the seriousness with which everyone involved approached the production.
Her reaction reflected the emotional weight of the material and the difficulty of recording Rudeus’s scenes.
The performance is particularly important because Uchiyama has voiced Rudeus throughout the anime, allowing viewers to hear the contrast between the younger Rudeus and the emotional devastation of the future presented in the diary.
Meanwhile, Tomokazu Sugita voices the older version of Rudeus, creating a clear vocal distinction between the two versions of the character.
What Happens Next in Mushoku Tensei Season 3?
The original draft referred to Episode 14 as “Resolve.”
That is incorrect.
The official title for Episode 14 is “Nothing Is More Expensive Than Free” (Tada yori Takai Mono wa Nai).
This is an important correction because the story now returns to the present timeline after the devastating events of Old Rudeus’s diary.
The official Episode 14 synopsis introduces a completely different situation.
Rudeus is captured in a Beastfolk village after being falsely accused of a crime. While waiting for Eris and Ruijerd to come and rescue him, he finds himself sharing a cell with Geese, who has been imprisoned because of a gambling-related cheating incident.
Then, suddenly, a smuggling organization attacks the village.
This means Episode 14 will shift the story away from the diary’s alternate future and back toward the current Rudeus and his ongoing journey.
For anime-only viewers, this creates an important change in tone.
Episode 13 showed what could happen if Rudeus fails.
Episode 14 returns to the question of what Rudeus will actually do now that he knows what is at stake.
The Importance of Old Rudeus’s Warning
Old Rudeus’s greatest contribution may not be the information he provides about Hitogami.
It may be the warning about Rudeus himself.
The diary shows that even when Rudeus has enormous magical power, knowledge,ge and experience, he can still make choices that destroy his relationships.
That is why the future Rudeus tells him to be careful.
He does not simply say:
“Become stronger.”
He effectively tells him:
“Do not become me.”
That distinction is central to the story.
A Beginner-Friendly Look at the Main Characters
Rudeus Greyrat
Rudeus is the protagonist of Mushoku Tensei.
He was originally a 34-year-old shut-in who died in his previous life and was reincarnated in a fantasy world.
In his new life, he decides to make better use of the opportunity he has been given.
He becomes a highly talented magician but continues struggling with emotional issues from his previous life.
Roxy Migurdia Greyrat
Roxy is one of Rudeus’s earliest teachers and later becomes his wife.
She is a talented magician from the Migurd race and one of the most important people in Rudeus’s development.
Her death is therefore especially devastating in Old Rudeus’s timeline.
Sylphiette
Sylphiette, often called Sylphie, is Rudeus’s childhood friend and later his wife.
She is one of the people who provide Rudeus with emotional stability.
Her fate in the diary is particularly painful because it follows Rudeus’s failure to recognize how deeply his actions hurt her.
Eris Greyrat
Eris is one of Rudeus’s former companions and a powerful swordswoman.
She spends years training to become stronger after separating from Rudeus.
Her return in Old Rudeus’s future demonstrates that her feelings for him remained important despite their complicated relationship.
Hitogami
Hitogami, also known as the Man-God, is a mysterious supernatural being who appears in Rudeus’s dreams.
He frequently offers advice and information.
However, the diary dramatically changes how viewers understand his relationship with Rudeus.
Old Rudeus
Old Rudeus is the future version of the protagonist.
After losing nearly everyone he loves, he spends decades trying to understand what went wrong.
Eventually, he returns to the past to warn his younger self.
His appearance creates one of the most important turning points in Season 3.
Why the Diary Matters to the Entire Story
The diary is important because it gives Rudeus something he has never had before:
direct knowledge of a possible future.
Before meeting Old Rudeus, the protagonist generally has to make decisions without knowing exactly what will happen.
Now he has seen one possible outcome.
That changes everything.
He knows that his actions can have consequences that are much larger than he expects.
He also knows that trusting the wrong person can put his family in danger.
And most importantly, he has been shown what happens when grief causes him to stop thinking clearly.
The diary is therefore not simply a shocking side story.
It is a warning designed to change the present.
Mushoku Tensei Season 3 Broadcast and Streaming Information
Mushoku Tensei III: Jobless Reincarnation began its regular weekly broadcast in Japan in July 2026 after a special consecutive broadcast of Episodes 1 and 2.
The official production team announced that Episodes 1 and 2 would form a special Eris Training Arc opening, with the two episodes receiving a special early broadcast and streaming event before the regular weekly schedule began.
The regular episodes then continued weekly.
For Episode 13, “The Diary,” the episode aired on September 20 at 24:00 JST, with the fastest simultaneous streaming available through ABEMA and d Anime Store.
Crunchyroll also lists Episode 13, “The Diary,” as released on September 20, 2026.
International streaming availability can vary depending on region.
Mushoku Tensei Season 3 Theme Songs
The third season features:
- Opening Theme: “Ketsui no Uta” by Yuiko Ohara
- Ending Theme: “Inori, Owareba” by Mika Nakashima
The official anime website announced Mika Nakashima’s ending theme ahead of the Season 3 broadcast, with the song later receiving a CD release announcement.
The season also featured the insert song “Shūen no Honō” (“Flames of the End”) during Episode 9. The official site announced the song and its digital release in August.
Mushoku Tensei Season 3 Staff
The main staff credited for the third season includes:
- Original Work: Rifujin na Magonote
- Original Character Design: Shirotaka
- Director: Ryosuke Shibuya
- Series Composition: Ryosuke Shibuya, Naoto Taniuchi
- Character Design: Manabu Shimada, Ryota Furukawa
- Chief Animation Directors: Keiya Nakano, Satoshi Shimada
- Art Director: Masakazu Miyake
- Color Design: Makiko Doi
- Director of Photography: Shinji Tonsho
- Editing: Akinori Mishima
- Sound Director: Jin Aketagawa
- Sound Effects: Rei Ueno
- Music: Yoshiaki Fujisawa
- Animation Production: Studio Bind
Studio Bind continues to handle the anime adaptation.
Mushoku Tensei Season 3 Main Cast
The Japanese cast includes:
- Rudeus Greyrat: Yumi Uchiyama
- Sylphiette Greyrat: Ai Kayano
- Roxy M. Greyrat: Konomi Kohara
- Eris Greyrat: Ai Kakuma
- Lilia Greyrat: Lynn
- Norn Greyrat: Saya Aizawa
- Aisha Greyrat: Yuki Takada
- Lucy Greyrat: Kana Hishikawa
- Ghislaine Dedoldia: Megumi Toyoguchi
- Zanoba Shirone: Satoshi Tsuruoka
- Cliff Grimoire: Ryota Osaka
- Elinalise Dragonroad: Rie Tanaka
- Atoferatofe Ryback: Nanako Mori
- Hitogami: Kujira
- Old Rudeus / Former-Life Man: Tomokazu Sugita
The performances of Yumi Uchiyama and Tomokazu Sugita are particularly important in the diary storyline because the audience is effectively watching two versions of the same character at different points in their lives.
What Episode 13 Really Means for Rudeus
The most important part of “The Diary” is not simply that Rudeus sees a terrible future.
It is that he now has an opportunity to change it.
Old Rudeus’s life demonstrates the consequences of acting out of grief, anger, and mistrust.
The younger Rudeus now has information that his future self desperately wanted him to have.
That means the question moving forward is no longer:
“Will Roxy, Sylphie and Eris die?”
Instead, the more important question is:
“What will Rudeus do differently now that he knows what could happen?”
That is the real purpose of the diary.
Mushoku Tensei III: Jobless Reincarnation Episode 13, “The Diary,” delivered the dark future that Old Rudeus had warned about, turning one of the series’ most disturbing pieces of information into a fully animated sequence.
Roxy’s illness and death, Cliff’s sacrifice, Sylphiette’s tragic fate, Eris’s final attempt to protect Rudeus, and Hitogami’s cruel revelation all combine to show how completely Old Rudeus’s life fell apart.
But the episode is not simply a tragedy.
It is also a warning.
The future shown in the diary exists because of a specific series of decisions. Old Rudeus returned to the past precisely because he wanted his younger self to avoid making those same choices.
That makes the story especially important for the present-day Rudeus.
He now knows what is at stake.
He knows what Hitogami is capable of.
He knows how easily grief can destroy his judgment.
And he knows that the people closest to him can become victims if he ignores the warning.
The response from fans shows just how strongly the episode affected viewers. Some praised the adaptation for finally visualizing the diary, while others admitted that it was one of the hardest Mushoku Tensei episodes they had ever watched.
The story now moves back to the present with Episode 14, officially titled “Nothing Is More Expensive Than Free.” According to the official synopsis, Rudeus finds himself imprisoned in a Beastfolk village after being falsely accused, only to encounter Geese in the same prison before a smuggling organization attacks the village.
After everything Rudeus has just witnessed in the diary, the next chapter carries a very different question:
Can he actually change the future that destroyed Old Rudeus’s life?
That is what makes the next episode—and the rest of Mushoku Tensei Season 3—so important.
