1x1 - 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.

1x2 - 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.

1x3 - 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.

1x4 - Episode 4

July 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.

1x5 - Episode 5

July 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.

1x6 - Episode 6

July 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.

1x7 - Episode 7

August 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.

1x8 - Episode 8

August 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.

1x9 - Episode 9

December 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.

1x10 - Episode 10

December 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.

1x11 - Episode 11

December 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.

1x12 - Episode 12

December 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.

1x13 - Episode 13

December 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.

1x14 - Episode 14

January 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.

1x15 - Episode 15

January 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.

1x16 - Episode 16

January 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.

1x17 - Episode 17

January 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.

1x18 - Episode 18

February 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.

1x19 - Episode 19

February 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.

1x20 - Episode 20

February 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.

1x21 - Episode 21

February 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.

1x22 - Episode 22

March 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.

1x23 - Episode 23

March 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.

1x24 - Episode 24

March 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.

1x25 - Episode 25

March 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.

1x26 - Episode 26

March 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.

1x27 - Episode 27

July 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.

1x28 - Episode 28

July 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.

1x29 - Episode 29

July 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.

1x30 - Episode 30

July 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.

1x31 - Episode 31

August 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.

1x32 - Episode 32

August 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.

1x33 - Episode 33

August 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.

1x34 - Episode 34

August 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.

1x35 - Episode 35

August 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.

1x36 - Episode 36

September 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.

1x37 - Episode 37

September 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.

1x38 - Episode 38

September 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.

1x39 - Episode 39

September 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.

1x40 - Episode 40

April 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.

1x41 - Episode 41

April 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.

1x42 - Episode 42

April 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.

1x43 - Episode 43

April 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.

1x44 - 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.

1x45 - 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.

1x46 - 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.

1x47 - 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.

1x48 - 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.

1x49 - Episode 49

June 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.

1x50 - Episode 50

June 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.

1x51 - Episode 51

June 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.

1x52 - Episode 52

June 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.

1x53 - Episode 53

April 3, 2021

1x54 - Episode 54

April 10, 2021

1x55 - Episode 55

April 17, 2021

1x56 - Episode 56

April 24, 2021

1x57 - Episode 57

May 1, 2021

1x58 - Episode 58

May 8, 2021

1x59 - Episode 59

May 15, 2021

1x60 - Episode 60

May 22, 2021

1x61 - Episode 61

May 29, 2021

1x62 - Episode 62

June 5, 2021

1x63 - Episode 63

June 12, 2021

1x64 - Episode 64

June 19, 2021

1x65 - Episode 65

June 26, 2021

1x66 - Episode 66

April 9, 2022

1x67 - Episode 67

April 16, 2022

1x68 - Episode 68

April 23, 2022

1x69 - Episode 69

April 30, 2022

1x70 - Episode 70

May 7, 2022

1x71 - Episode 71

May 14, 2022

1x72 - Episode 72

May 21, 2022

1x73 - Episode 73

May 28, 2022

1x74 - Episode 74

June 4, 2022

1x75 - Episode 75

June 11, 2022

1x76 - Episode 76

June 18, 2022

1x77 - Episode 77

June 25, 2022

1x78 - Episode 78

July 2, 2022

1x79 - Episode 79

April 8, 2023

1x80 - Episode 80

April 15, 2023

1x81 - Episode 81

April 22, 2023

1x82 - Episode 82

April 29, 2023

1x83 - Episode 83

May 6, 2023

1x84 - Episode 84

May 13, 2023

1x85 - Episode 85

May 20, 2023

1x86 - Episode 86

May 27, 2023

1x87 - Episode 87

April 6, 2024

1x88 - Episode 88

April 13, 2024

1x89 - Episode 89

April 20, 2024

1x90 - Episode 90

April 27, 2024

1x91 - Episode 91

May 4, 2024

1x92 - Episode 92

May 11, 2024

1x93 - Episode 93

May 18, 2024

1x94 - Episode 94

May 25, 2024

1x95 - Episode 95

June 1, 2024

1x96 - Episode 96

June 8, 2024

1x97 - Episode 97

June 15, 2024

1x98 - Episode 98

June 22, 2024

1x99 - Episode 99

June 29, 2024

1x100 - Episode 100

July 6, 2024

Yuko Sanpei

Butt Detective (voice)

Ayaka Saito

Brown (voice)

Takahiro Sakurai

(voice)

Ikkei Watanabe

(voice)

Takayuki Sugo

(voice)

Reika Uyama

(voice)