The story begins with Taro Sakamoto, once the world's most feared hitman, now retired and running a convenience store. He has gained weight and lives a peaceful life with his wife Aoi and their daughter Hana, having left his violent past behind. Despite his new life, Sakamoto remains highly skilled and capable, though he insists on avoiding killing whenever possible.

Early in the season, a billion yen bounty is placed on Sakamoto's head by the JAA (Japan Assassin Association), signaling that his past is catching up with him. Sakamoto interrogates Tatsu, who confirms the bounty and reveals that the JAA is behind it. This sets the stage for Sakamoto to be drawn back into the dangerous world he left.

Sakamoto's peaceful routine is disrupted when his apprentice, Shin Asakura, a young and hotheaded assassin, and Lu Xiaotang, a skilled Chinese assassin, join him. Shin and Lu help run the store while Sakamoto attends to family matters. Shin and Lu argue about Shin's clairvoyance, which irritates Shin and causes him to leave the store in anger.

Shortly after, a team of scientists arrives and kidnaps Lu, mistaking her for Shin. Shin and Sakamoto give chase but are stopped by Seba, a hired hitman who can turn invisible. Shin leads Sakamoto to the Okutabi Science Museum, which hides a secret lab where Shin was raised. Inside, they discover that an assassin group led by Kashima has taken control of the lab and is holding the director hostage, forcing the scientists to develop assassination methods.

Sakamoto and Shin fight through the lab's robotic security and defeat one of the assassins, Mad Horiguchi. Sakamoto promises to free the lab and save Shin's childhood home. Meanwhile, Lu is imprisoned with the lab director, Asakura, who reveals he has a plan to escape. Outside, two Order assassins, Shishiba and Osaragi, arrive to investigate a tip about the lab.

In another sequence, Sakamoto and Aoi attend a school event for their daughter Hana, showing a brief moment of family normalcy amidst the chaos. Meanwhile, Shin and Lu continue to manage the store and deal with the fallout from the lab incident.

Later in the season, Shin faces off against a powerful enemy named Saw. During their intense battle, Saw threatens to target Sakamoto's family, which pushes Shin to unlock a new ability: future-predicting. This awakening significantly increases Shin's power, allowing him to land attacks that cause Saw pain for the first time. The fight is visually dramatic and marks a turning point for Shin's character development.

Throughout the season, Sakamoto's former colleagues and rivals, including Nagumo and Gaku, reappear, complicating his efforts to maintain his new peaceful life. Nagumo is a flamboyant but deadly assassin from Sakamoto's past, while Gaku is a former colleague now working against him.

The season ends with Sakamoto and his allies continuing to confront threats from the assassin underworld, balancing their dangerous missions with their personal lives. Shin's new abilities and the ongoing battles set the stage for further conflicts and character growth in the next part of the series.

This detailed progression covers the major plot points, character decisions, fights, and key events in strict chronological order for Sakamoto Days Season 1 (2025).

The ending of Sakamoto Days Season 1 (2025) concludes with Sakamoto, Shin, and Lu facing a high-stakes gambling challenge posed by Wutang in an underground casino, while simultaneously dealing with ongoing threats from assassins and the bounty on Sakamoto's head. The season ends with Aoi, Sakamoto's wife, seemingly in danger due to the schemes of the antagonist Slur.

Narrated scene-by-scene, the ending unfolds as follows:

The final episodes of Season 1 open with Sakamoto, the retired hitman turned convenience store owner, alongside his loyal allies Shin and Lu Shaotang, preparing to confront a new challenge. They are invited--or rather forced--into a gambling competition in a shadowy underground casino, orchestrated by the formidable Wutang, a powerful figure in the assassin underworld. The stakes are high, and the tension palpable, as this contest is not merely about money but survival and clearing Sakamoto's name from the bounty placed on him.

As the gambling unfolds, the trio must rely on their wits, skills, and trust in each other. The scenes are charged with suspense, showing Sakamoto's calm demeanor contrasted with the dangerous environment. Meanwhile, the narrative intersperses flashbacks and moments of quiet reflection, revealing the deep bonds between Sakamoto and his family, especially his wife Aoi, who represents the peaceful life he fights to protect.

Parallel to the gambling scenes, the story reveals the machinations of Slur, a cunning antagonist whose schemes put Aoi in jeopardy. The tension escalates as Slur's plans threaten to unravel the fragile peace Sakamoto has built. The show carefully depicts Aoi's vulnerability and the looming danger, heightening the emotional stakes for Sakamoto and his allies.

The climax of the season is a blend of intense action and strategic gambits. Sakamoto and his friends fend off assassination attempts while navigating the casino's perilous games. The animation highlights their teamwork and individual skills, with Sakamoto's legendary hitman abilities subtly surfacing despite his retired status.

In the final moments, the season closes on a cliffhanger: while the immediate threat from the gambling challenge is addressed, Aoi's fate remains uncertain as she appears to be in serious danger due to Slur's ongoing schemes. This unresolved tension sets the stage for the next part of the story, emphasizing the themes of loyalty, the cost of past lives, and the struggle to protect loved ones in a world that refuses to let go of old conflicts.

Regarding the main characters' fates at the end of Season 1:

• Taro Sakamoto remains alive and resolute, having survived the gambling challenge and assassination attempts, but still burdened by the bounty and threats against his family.

• Shin and Lu Shaotang continue as Sakamoto's trusted allies, their bond strengthened through shared trials.

• Aoi, Sakamoto's wife, is left in a precarious position, her safety compromised by Slur's schemes, creating a critical narrative tension.

• Slur remains an active antagonist, his plans partially successful in endangering Aoi, ensuring ongoing conflict.

This detailed ending emphasizes the ongoing struggle between Sakamoto's desire for a peaceful life and the violent world he left behind, with the season closing on a note of suspense and unresolved danger.

The TV show Sakamoto Days Season 1 (2025) does not have any publicly documented post-credit scene. None of the available detailed episode recaps, director or producer commentaries, or reviews mention a post-credit scene or describe any content that appears after the credits in Season 1.

The sources focus on key scenes within episodes, character introductions, and the overall story progression, but there is no indication of an additional scene after the credits. If a post-credit scene exists, it has not been highlighted or discussed in official breakdowns or fan discussions available as of now.

The Okutabi Lab is a secret underground research facility where Shin Asakura was raised. In Season 1, it becomes a key location when a group of scientists are kidnapped by an assassin group led by Kashima, who takes the lab's director hostage to force research on assassination methods. Sakamoto and Shin infiltrate the lab to rescue the director and liberate the facility, facing robotic security and hired assassins like Mad Horiguchi. This arc reveals Shin's past and the threat posed by the Order assassins investigating the lab.

In Season 1, Shin and Lu have a tense relationship partly due to Shin's clairvoyance. They argue about it while working at Sakamoto's store, which irritates Shin and causes him to leave angrily. This tension is significant because Lu is later mistaken for Shin and kidnapped by scientists, prompting a rescue mission. Their dynamic highlights the challenges within Sakamoto's group and adds depth to their characters.

Season 1 introduces several antagonists: the assassin group led by Kashima, who seizes control of the Okutabi Lab to force assassination research; the Order assassins Shishiba and Osaragi, who investigate the lab based on a tip; and the flamboyant assassin Nagumo, linked to Sakamoto's past. Their motivations revolve around power, control of assassination technology, and settling old scores with Sakamoto and his allies.

Taro Sakamoto's family life is central to Season 1's plot. After retiring from his deadly assassin career to run a convenience store and start a family with his wife Aoi and daughter Hana, his peaceful life is disrupted when his past enemies resurface. His family motivates him to avoid killing whenever possible and to protect his new life, creating a contrast between his former lethal self and his current role as a family man and store owner.

Throughout Season 1, Sakamoto and Shin's relationship evolves from mentor and hotheaded apprentice to a more cooperative partnership. Shin's impulsiveness and clairvoyance contrast with Sakamoto's experienced, calm approach. Their joint efforts to rescue the Okutabi Lab director and confront assassins demonstrate growing trust and teamwork, with Sakamoto guiding Shin to balance his skills with strategy and restraint.

The TV show Sakamoto Days (Season 1, 2025) is rated TV-MA and is not family-friendly for children or sensitive viewers due to its content. It features moderate violence and gore, including frequent fight scenes with weapons, blood, and some graphic moments such as beheadings and stabbing visualizations, though often presented with a comedic tone. There is moderate profanity, including use of strong language like the f-word and s-words. There is no sexual nudity, but some female characters wear revealing clothing. Alcohol and drug use is mild, and frightening or intense scenes are mild but present. The show blends action, comedy, and violence centered on a former hitman's life, which may be upsetting or inappropriate for younger or sensitive audiences.