A polite and meticulous super sleuth known as the Butt Detective solves a myriad of baffling mysteries, blowing raspberries in the face of crime.
DirectorHiroki Shibata
WriterNatsuko Takahashi
Episode 1
May 3, 2018
There's a candy thief at large and Butt Detective's on the case with Brown as his backup. But the trail of the culprit leads right into a lake.
Episode 2
May 4, 2018
Butt Detective goes to the station, where the officers are looking into who's behind a string of burglaries. But the chief has another job for them.
Episode 3
May 5, 2018
After a Kaito the canine crook threatens to steal the Goddess Scarf from the museum, Butt Detective prepares to protect the precious booty.
Episode 4
Jul 14, 2018
The Black Shadow thieves are in town and the police ask Butt Detective for assistance in putting an end to their mischief before any theft occurs.
Episode 5
Jul 21, 2018
Butt Detective, Brown and Chief Maltese must get to the bottom of the Black Shadow Gang's burglaries. Later, they search for the leader's hideout.
Episode 6
Jul 28, 2018
After someone leaves a strange box at the Lucky Cat, the police show up to help only to find they're behind Butt Detective, who's already on the case.
Episode 7
Aug 4, 2018
A conversation at a feline cafe leads Butt Detective to reveal the backstory of how Brown became his assistant, going back to how he learned to talk.
Episode 8
Aug 25, 2018
A potato-loving lady clad in purple knocks on Butt Detective's door and asks him to get to the bottom of a mysterious message from her ancestors.
Episode 9
Dec 1, 2018
The purple potato case continues as Butt Detective, Brown and their purple companion head into the ancestors' hut. But it appears to be empty.
Episode 10
Dec 8, 2018
While hearing about a forest cafe's missing manager, Butt Detective realizes he's been tailed by a persistent koala who may be after Brown's job.
Episode 11
Dec 1, 2018
When the local barbershop owner complains of a spooky ghost scaring his customers, Butt Detective volunteers to get to the bottom of the mystery.
Episode 12
Dec 8, 2018
Butt Detective is asked to protect the Oyagi family treasure from Kaito U, a master of disguise, but he seems to remain one step behind the thief.
Episode 13
Dec 15, 2018
Master burglar Kaito U's stolen the booty from right under Butt Detective's cheeks. But our perceptive hero is not far behind the thief.
Episode 14
Jan 5, 2019
Butt Detective gets a mysterious letter from a faraway jungle, but it's missing a return address on its back. He and Brown head out for an adventure.
Episode 15
Jan 12, 2019
Butt Detective and Brown venture further into the dangerous ruins only to come face-to-face— or rather cheek-to-cheek—with a familiar figure.
Episode 16
Jan 19, 2019
Butt Detective is expecting to be interviewed by Cafe Guide magazine, but the odd interviewer who arrives doesn't quite pass the sniff test.
Episode 17
Jan 26, 2019
Just as Butt Detective is about to go to the police station to learn about a new crime-fighting tool, he receives an urgent call about a stolen item.
Episode 18
Feb 2, 2019
An international crime-fighting organization has discovered Kaito U's hiding place. Before they head in, Butt Detective is brought along as backup.
Episode 19
Feb 9, 2019
Butt Detective and Brown resolve to get to the bottom of rumors about a giant thief. They soon deduce what appears to be its present location.
Episode 20
Feb 16, 2019
While the cops continue their investigation into the giant jewel thief, Butt Detective and Brown are hot on the heels (and cheeks) of the big bandit.
Episode 21
Feb 23, 2019
Brown reports that while Butt Detective was out, someone stole his precious snack. The big-cheeked detective uses the case as a training opportunity.
Episode 22
Mar 2, 2019
Koala-chan asks Butt Detective for help dealing with ghosts seen near a park she likes. Brown insists he's not scared but doesn't seem to want to go.
Episode 23
Mar 9, 2019
Butt Detective, Brown and Koala-chan are trapped behind a locked door in the supposedly-haunted mansion but he soon deduces an alternate egress.
Episode 24
Mar 16, 2019
After getting his cheeks shaved, Butt Detective accepts a job from the police to return a stolen item to its owner. But no one knows who it is.
Episode 25
Mar 23, 2019
Butt Detective investigates a robbery at the Elvis Grizzly museum. The case darkens as the clues lead back to one of the police's own K-9 officers.
Episode 26
Mar 30, 2019
When a missing bag turns back up filled with cash, Butt Detective must reconstruct a series of unintentional exchanges before two lovebirds depart.
Episode 27
Jul 6, 2019
A wealthy banker whose daughter has been kidnapped calls on Butt Detective. The criminal is demanding his famous Rainbow Diamond, but it's missing.
Episode 28
Jul 13, 2019
Butt Detective's search for the Rainbow Diamond is almost at an end. But some wall-writings indicate that actually picking it up might not be so easy.
Episode 29
Jul 20, 2019
Kaito U's back and he's threatening to steal a porcine spa's "greatest treasure." Butt Detective and the K-9s try to deduce what it could be.
Episode 30
Jul 27, 2019
Butt Detective and Brown head to a local festival, where a troublemaker who looks just like the double-cheeked detective has been making mischief.
Episode 31
Aug 3, 2019
Butt Detective uses the cards and coin that his doppelganger left behind to locate him. Meanwhile, Brown helps his new female friend find her ribbon.
Episode 32
Aug 10, 2019
A new investigator claims to be the best and challenges Butt Detective to a public detective match. But our hero senses something amiss.
Episode 33
Aug 17, 2019
There's trouble at the KNK bank and the police ask Butt Detective to take the job. But soon Carrot Horse butts in, complicating the situation.
Episode 34
Aug 24, 2019
Butt Detective receives another request from rich banker Kamenokoji. His daughter Midori is up to something odd and he wants the sleuth to tail her.
Episode 35
Aug 31, 2019
The K-9 cops and a gang of sparrow laborers ask Butt Detective to look into what's behind a series of spooky ghost-sightings at an old clock tower.
Episode 36
Sep 7, 2019
After feline thieves nab a special cane, Butt Detective is on the case. He's joined by his double-cheeked dad, who has a history with the stolen item.
Episode 37
Sep 14, 2019
Brown and his koala pal star in a new detective movie. But behind the scenes, Butt Detective must solve a real case involving some thieving monkeys.
Episode 38
Sep 21, 2019
Butt Detective arrives at Castle Wolf to protect its booty from Kaito U. But he gets the impression there's something not quite right with his host.
Episode 39
Sep 28, 2019
Butt Detective arrives at the treasure only to see it stolen by Kaito U. But then a second Kaito U appears and each claims that the other is a phony.
Episode 40
Apr 4, 2020
Butt Detective and Brown head to a ski slope to investigate rumors of a monstrous yeti, who is behind the resort’s sudden drop in customers.
Episode 41
Apr 11, 2020
Butt Detective's deductions finally lead him to the bottom of the yeti mystery. But he still needs to catch the culprits responsible for its creation.
Episode 42
Apr 18, 2020
Butt Detective's deductions finally lead him to the bottom of the yeti mystery. But he still needs to catch the culprits responsible for its creation.
Episode 43
Apr 25, 2020
Chief Maltese butts heads with his rival, Chief Chihuahua, at a restaurant. After something goes missing, they compete to see who can solve the case.
Episode 44
May 2, 2020
Butt Detective uses tricky tactics to give Brown a lesson in sleuthing. Later, the local kids surprise Brown by giving him a case of his own to solve.
Episode 45
May 9, 2020
Butt Detective and Brown receive a mysterious visitor. Once they deduce his identity, he asks them to help stop Kaito U from stealing his treasure.
Episode 46
May 16, 2020
Butt Detective and the contestants face their next trial: a giant, menacing snake. Later, Kaito U finally shows himself and tries to steal the veil.
Episode 47
May 23, 2020
Kaito U enters the infamously inescapable Orinona Prison and its straight-arrow warden vows to reform him. But Kaito U isn't about to change his ways.
Episode 48
May 30, 2020
Kaito U and his crow companion escape from their prison cell, but they're not out of danger yet. Their first stop is the guards' break room.
Episode 49
Jun 6, 2020
While Butt Detective and the canine cops review a string of apple thefts, a journalist bursts in to report his camera was stolen by a spooky culprit.
Episode 50
Jun 13, 2020
After two painful cavities lead Brown and Koala-chan to meet at the dentist's office, a canine detective asks them to find his 11 missing puppies.
Episode 51
Jun 20, 2020
The canine cops reveal a new crime-fighting invention that they're very proud of. But it reminds Brown of the destruction caused by their last one.
Episode 52
Jun 27, 2020
Kaito U is going after the opera house's treasure, so Butt Detective and Brown pay a visit. One of the actors they see on stage is awfully familiar.
Episode 53
Apr 3, 2021
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Episode 54
Apr 10, 2021
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Episode 55
Apr 17, 2021
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Episode 56
Apr 24, 2021
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Episode 57
May 1, 2021
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Episode 58
May 8, 2021
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Episode 59
May 15, 2021
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Episode 60
May 22, 2021
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Episode 61
May 29, 2021
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Episode 62
Jun 5, 2021
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Episode 63
Jun 12, 2021
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Episode 64
Jun 19, 2021
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Episode 65
Jun 26, 2021
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Episode 66
Apr 9, 2022
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Episode 67
Apr 16, 2022
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Episode 68
Apr 23, 2022
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Episode 69
Apr 30, 2022
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Episode 70
May 7, 2022
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Episode 71
May 14, 2022
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Episode 72
May 21, 2022
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Episode 73
May 28, 2022
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Episode 74
Jun 4, 2022
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Episode 75
Jun 11, 2022
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Episode 76
Jun 18, 2022
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Episode 77
Jun 25, 2022
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Episode 78
Jul 2, 2022
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Episode 79
Apr 8, 2023
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Episode 80
Apr 15, 2023
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Episode 81
Apr 22, 2023
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Episode 82
Apr 29, 2023
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Episode 83
May 6, 2023
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Episode 84
May 13, 2023
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Episode 85
May 20, 2023
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Episode 86
May 27, 2023
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Episode 87
Apr 6, 2024
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Episode 88
Apr 13, 2024
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Episode 89
Apr 20, 2024
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Episode 90
Apr 27, 2024
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Episode 91
May 4, 2024
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Episode 92
May 11, 2024
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Episode 93
May 18, 2024
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Episode 94
May 25, 2024
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Episode 95
Jun 1, 2024
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Episode 96
Jun 8, 2024
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Episode 97
Jun 15, 2024
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Episode 98
Jun 22, 2024
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Episode 99
Jun 29, 2024
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Episode 100
Jul 6, 2024
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Episode 101
Jul 13, 2024
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Episode 102
Oct 5, 2024
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Episode 103
Oct 12, 2024
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Episode 104
Oct 19, 2024
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Episode 105
Oct 26, 2024
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Episode 106
Nov 2, 2024
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Episode 107
Nov 9, 2024
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Episode 108
Nov 16, 2024
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Episode 109
Apr 5, 2025
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Episode 110
Apr 12, 2025
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Episode 111
Apr 19, 2025
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Episode 112
Apr 26, 2025
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Episode 113
May 3, 2025
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Episode 114
May 10, 2025
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Episode 115
May 17, 2025
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Episode 116
May 24, 2025
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Episode 117
Oct 4, 2025
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Episode 118
Oct 11, 2025
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Episode 119
Oct 18, 2025
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Episode 120
Oct 25, 2025
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Episode 121
Nov 1, 2025
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Episode 122
Nov 8, 2025
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Episode 123
Nov 15, 2025
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Episode 124
Apr 4, 2026
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Episode 125
Apr 11, 2026
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Episode 126
Apr 18, 2026
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Episode 127
Apr 25, 2026
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Episode 128
May 2, 2026
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Episode 129
May 9, 2026
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Episode 130
May 16, 2026
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Episode 131
May 23, 2026
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