Best Mystery Anime of 2026

Third season of Kusuriya no Hitorigoto.

It is widely known that nobles will resort to any means for power—lying, manipulation, and extortion are the standard methods. Yet one family stands apart: House Grail, whose core values are truth and integrity. The youngest daughter, Constance Grail, shares her family's moral compass, always striving to do what is right and aid those in need. However, these principles prove useless when her fiancé betrays her with another woman. Framed by his lover in a scheme to ruin her, Constance finds no one willing to listen to her cries for justice. All turn a blind eye—except for one: the spirit of the infamous Scarlett Castiel, who takes possession of Constance and turns the situation against her accuser. But this help comes at a cost. Ten years ago, Scarlett was executed for the attempted murder of Princess Cecilia. In truth, it was a setup; as blunt and harsh as Scarlett could be, she would never stoop to using poison. She has no clue who orchestrated her framing, but Scarlett demands that Constance—the only person who can see her—assist in exacting revenge on all who wronged her!

Second season of Tantei wa Mou, Shindeiru.

The Branch of Reincarnation is a mystical artifact that bestows the abilities of one’s previous lives, provided the user sacrifices themselves by slitting their throat with it. Touya Senji, a high school student plagued by deep-seated insecurity, has lived in the constant shadow of his extraordinarily gifted older sibling. Believing that academic excellence is his only path to standing out, he throws himself into his studies, yet finds no fulfillment even though he consistently ranks among the top one hundred in national practice exams. His life takes a dramatic turn when he witnesses Haito Luo Buffett, a classmate and a Returner who has awakened her past-life talents through the Branch, battling a serial killer.

By 2029, Niihama City has evolved into a highly advanced technological hub where cybernetic enhancements allow citizens to replace limbs with robotic prosthetics. As globalization deepens global connectivity, Public Security Section 9 is tasked with fighting corruption, terrorism, and other severe threats arising from this new era. The determined Major Motoko Kusanagi leads the unit in investigating the Puppet Master, a mysterious hacker who leaves victims with their memories erased. Resembling the rest of the population in this futuristic setting, the Puppet Master’s body is mostly mechanical, granting them immense power. As Motoko and her team pursue the elusive criminal, other entities, including Section 6, intervene, complicating the investigation. While reflecting on profound philosophical issues like the meaning of existence, Motoko comes to understand that the Puppet Master holds the answers she seeks.

Nanoka travels through a portal to the Taisho era, where exorcist Mao reluctantly saves her from the jaws of a grotesque yokai. After returning to the present, Nanoka discovers she has gained remarkable new abilities. She goes back to the past in search of answers, only to become involved in Mao's investigation of a series of gruesome murders. As her own questions grow, Nanoka learns that Mao is cursed by a cat demon named Byoki—and so is his sword. If anyone other than Mao attempts to wield it, they meet their doom. But when Mao's life is in danger, Nanoka picks up his blade and swings.

Sakuya Otsuki is the son of a legendary detective, striving to follow in his father's footsteps with his assistant Lilithea. But something is off about this high-school sleuth. Everywhere he goes, he always ends up tangled in his cases—as a murder victim! When Sakuya is sent to infiltrate a luxury cruise ship, he meets his end once more. Yet each time he opens his eyes, Lilithea is there, ready to help him crack the mystery...

In the dim alleys of Lügenberg, where humans and demihumans share an uneasy coexistence, a peculiar detective agency operates outside official law. Vampire detective Arne Neuntöte chases the bizarre, navigating the thin line between brutality and truth. The arrival of Lynn Reinweiß, a noblewoman whose fascination with vampires blinds her to their peril, changes everything. She and Arne join forces to investigate bloody enigmas emerging from Lügenberg's deepest shadows, as death and deceit fester beneath the city's gothic surface. With each resolved case, Arne and Lynn repeatedly learn that the surface never tells the whole story.

Shizuku Kanzaki, the only child of famed wine critic Yutaka Kanzaki, endured an unusual upbringing focused entirely on wine. His father trained him in everything from the proper way to decant a bottle to memorizing the scents of leather belts and pencils, which made Shizuku develop a deep hatred for all things wine. Fed up with his father, he left home and became an ordinary sales representative at a beer company, vowing never to touch wine again. After Yutaka suddenly passes away, Shizuku is pulled back into the world he despises. According to the will, whoever can correctly identify the “12 Apostles” of wines and the legendary “Drops of God” will inherit his prized wine collection and estate. Shizuku has one year to complete the challenge, and he finds the task absurd since he is Yutaka’s only living relative. But what Yutaka never revealed to his son before dying was that he had adopted Issei Tomine into the family just one week prior to his death. Issei, a famous veteran wine critic known as “The Prince of Wine,” now competes against Shizuku for the inheritance. With no formal training in wine tasting, Shizuku seems hopelessly outmatched and risks losing everything. Can he manage to identify the elusive “Drops of God” before time runs out?

Anna Akechi, a second-year junior high schooler residing in Makoto Mirai Town, finds her life upended on her fourteenth birthday. A serendipitous meeting with a fairy named Pochitan and a magical pendant propel her backward through time, transporting her from 2027 to 1999. In this version of Makoto Mirai Town, twenty-eight years prior, she encounters Mikuru Kobayashi, a girl of the same age who dreams of becoming a renowned detective. As residents struggle with the mysterious theft of their cherished items by a faction known as the Phantom Thieves, Anna and Mikuru transform into Precures to combat the threat. Anna hopes that by unraveling these mysteries, she might discover the key to returning to her own era.

Ritsu's grandfather passed down a sixth sense to him, along with a demonic guardian called Blue Storm. The two are constantly surrounded by strange occurrences, and it falls on them to uncover the truth behind each mystery. While every story is self-contained, recurring characters appear throughout, each dealing with things 'not of this world' in their own unique way.

The web abounds with creepypastas, cryptid encounters, stories of the supernatural, and missing-person cases that remain unsolved. For the most part, these are hoaxes and jokes spread by online troublemakers—mere amusement. However, a handful of unlucky individuals discover the hard way that certain legends hold truth. Those miserable souls often face a grim fate, yet their fortune might turn if they encounter the boy in the red hood. He travels between communities, showing up wherever odd events take place. Does he serve as a beacon in the darkness? Or does he demonstrate that monsters are undeniably real...?

Tenth season of Oshiri Tantei.