Detectives These Days Are Crazy!

Detectives These Days Are Crazy! (Japanese: まったく最近の探偵ときたら, Hepburn: Mattaku Saikin no Tantei Tokitara; lit. 'Detectives These Days, Really') is a Japanese manga series written and illustrated by Masakuni Igarashi. It began serialization in ASCII Media Works' seinen manga magazine Dengeki Maoh in April 2016. An anime television series adaptation produced by Liden Films premiered in July 2025.

Detectives These Days Are Crazy!
First tankōbon volume cover, Mashiro Nakanishi (back) and Keiichiro Nagumo (front)
まったく最近の探偵ときたら (Mattaku Saikin no Tantei Tokitara)
Genre	Comedy, mystery[1]
Manga
Written by	Masakuni Igarashi
Published by	ASCII Media Works
English publisher	NA: One Peace Books
Imprint	Dengeki Comics NEXT
Magazine	Dengeki Maoh
Original run	April 27, 2016 – present
Volumes	15
Anime television series
Directed by	Rion Kujo
Written by	Rintarō Ikeda
Music by	Tomoki Kikuya
Studio	Liden Films
Licensed by	Crunchyroll SEA: Medialink
Original network	AT-X, Tokyo MX, BS11, SUN, KBS Kyoto
Original run	July 1, 2025 – present
Episodes	6

Plot

About 20 years ago, Keiichiro Nagumo was an ace detective in Japan despite being in high school. No case was too tough for him to solve. However, at 35 years old, his age is catching up with him. Nagumo no longer has the youthful energy or fame from his high school days. Suffering from aching hips and back issues, on top of growing increasingly jaded, his private eye office is struggling to attract clients and making it hard to afford rent and food. One day, an excitable high school girl named Mashiro Nakanishi appears at his doorstep and wants to be his apprentice, which he refuses. After she helps him finish a case, Nagumo reluctantly hires her.

Characters

Keiichiro Nagumo (名雲 桂一郎, Nagumo Keiichirō)

Voiced by: Junichi Suwabe (voice comic, anime)^[2][3]

A former genius detective as a high school boy, but now a washed up 35-year-old man running a failing private detective agency who struggles with modern technology and cultural references. Even so, he indirectly inspired a newer generation of detectives and assistants with his former exploits.

Mashiro Nakanishi (中西 真白, Nakanishi Mashiro)

Voiced by: Kana Hanazawa (voice comic, anime)^[2][3]

A bubbly and excitable high school girl who looks up to Nagumo, often uses brute force to complete any task she is given. She can somehow procure any equipment in an instant, from a self-inflating stunt mat to a loaded flamethrower, hidden in her student uniform.

Cerberus (ケルベロス, Keruberosu)

Voiced by: Chado Horii (voice comic, anime)^[2][4]

A stray cat that was captured by Nagumo for a client, only to find out the cat was not the same as the client's. Due to the client's refusal to take it with her, Mashiro decided to keep the cat in the office and named it Cerberus.

Taro Nezu (根津 太郎, Nezu Tarō)

Voiced by: Kengo Kawanishi (voice comic, anime)^[2][5]

A low-level Yakuza who quits his job after Mashiro torches his group's office with a flamethrower. He soon joins the Nagumo Detective Agency, running errands for them.

Yuu Asunaro (翌檜 ユウ, Asunaro Yū)

Voiced by: Tomohiro Yamaguchi (anime)^[6]

Another fan of Nagumo's younger days who wants to become his apprentice, even though he has his own detective work and adoring female fanbase. Unlike Nagumo, he wears more traditional Japanese clothing. A master of lockpicking and other security tasks that require finesse, he immediately becomes Mashiro's biggest rival.

Hana Kazamaki (風巻 ハナ, Kazamaki Hana)

Voiced by: Aya Hirano (anime)^[6]

Yuu's assistant who seems to just tolerate his antics and his nickname for her of "Maki-chan." She was given the job after not being intimidated like the rest of his fangirls when Yuu deliberately made himself appear ugly during an audition to be his assistant. Even so, Hana has an inferiority complex about her size and real age.

Azuha Hoshino (星野アズハ, Hoshino Azuha)

Voiced by: Fairouz Ai (anime)^[5]

College dropout and self-proclaimed Star Agent who invents several spy gadgets and custom drugs. Her office is on the floor below that of the Nagumo Detective Agency.

Fū-chan (風ちゃん)

Voiced by: Misaki Watada (anime)^[5]

The daughter of Detective Mimasaka who was inspired by her father's stories on the job, and now dreams of becoming "Phantom Thief Beaver," constantly stealing little items from Nagumo's office to prove her skills and annoying Mashiro with comments about her appearance.

Soya Mimasaka (美馬坂総也, Mimasaka Sōya)

Voiced by: Yasuyuki Kase (anime)^[5]

Nagumo's former classmate. Similar to Nagumo, he was a detective in his high school days who turned 35 years old, and struggles with modern-day technology. Unlike Nagumo, he joined the TMPD after graduation, and now works as a civil servant instead of a private eye. He claims to know Mashiro's "real identity" and the reason behind Nagumo's downfall from fame.

Coach (コーチ, Kōchi)

Voiced by: Hajime Iijima (anime)^[5]

A large black man whose real name is unknown, but often featured in Mashiro's flashbacks as having trained her to fight.

Media

Manga

Written and illustrated by Masakuni Igarashi, Detectives These Days Are Crazy! began serialization in ASCII Media Works' seinen manga magazine Dengeki Maoh on April 27, 2016.^[7] Its chapters have been compiled into fifteen tankōbon volumes as of August 2024.^[8] The series is licensed by One Peace Books for English publication.^[9]

No.	Original release date	Original ISBN	English release date	English ISBN
1	July 27, 2016[10]	978-4-04-892253-1	April 28, 2025[11]	978-1-64-273463-8
2	February 27, 2017[12]	978-4-04-892682-9	August 28, 2025[13]	978-1-64-273485-0
3	September 27, 2017[14]	978-4-04-893366-7	—	—
4	March 27, 2018[15]	978-4-04-893710-8	—	—
5	February 27, 2019[16]	978-4-04-912362-3	—	—
6	January 27, 2020[17]	978-4-04-912983-0	—	—
7	August 26, 2020[18]	978-4-04-913356-1	—	—
8	November 27, 2020[19]	978-4-04-913596-1	—	—
9	April 26, 2021[20]	978-4-04-913804-7	—	—
10	September 27, 2021[21]	978-4-04-913920-4	—	—
11	January 27, 2022[22]	978-4-04-914193-1	—	—
12	July 27, 2022[23]	978-4-04-914487-1	—	—
13	December 26, 2022[24]	978-4-04-914787-2	—	—
14	July 27, 2023[25]	978-4-04-915021-6	—	—
15	August 27, 2024[8]	978-4-04-915429-0	—	—

Anime

An anime television series adaptation was announced on August 23, 2024.^[3] It is produced by Liden Films and directed by Rion Kujo, with Rintarō Ikeda overseeing series scripts, Isoroku Koga designing the characters and serving as chief animation director, and Tomoki Kikuya composing the music.^[26] The series premiered on July 1, 2025, on AT-X and other networks.^[5] The opening theme song is "Suffer", performed by Taiiku Okazaki, while the ending theme song is "GORI☆GORI Feez e-Girl!!", performed by Kana Hanazawa (as Mashiro) and Tomokazu Sugita (as "Jolly Old Men").^[27] Crunchyroll is streaming the series.^[28][29] Medialink licensed the series in Southeast Asia and Oceania (except Australia and New Zealand) for streaming on Ani-One Asia's YouTube channel.^[30]

Episodes

No.	Title [31][32]	Directed by [31]	Written by [31]	Storyboarded by [31]	Original release date [33]
1	"Former Great Detective Nagumo Keiichiro" Transliteration: "Moto Meitantei Nagumo Keiichirō" (Japanese: 元名探偵 名雲桂一郎)	Rion Kujō [ja]	Rintarō Ikeda	Rion Kujō	July 1, 2025 (2025-07-01)
	"Mashiro's Pest Extermination" Transliteration: "Mashiro no Gaichū Taiji" (Japanese: 真白の害虫退治)
Private Detective Keiichiro Nagumo tries to track down a suspected cheating wife when his back flares in pain. Before he can make it out the door, a hyperactive high school girl shows up unannounced and requests to be his assistant. He refuses and follows his target to a nearby café, when the same girl shows up again, and helps him complete the job by pretending to be his "age gap" girlfriend despite his loud protestations. After getting photographic proof of the cheating wife for the client, Nagumo reluctantly lets the girl stay on as an unpaid apprentice, and she reveals her name as Mashiro. After taking on a stray cat as their unofficial mascot, Nagumo tasks Mashiro with another client's request to exterminate a bees' nest. However, a lack of clarity on the address leads Mashiro to the office of a yakuza group, but she proceeds to destroy it anyway. In the process, she scares a low-level member named Nezu to quit before she kills him, and Nezu repays her by joining Nagumo's office.
2	"With Ghosts, Go for the Knees" Transliteration: "Obake wa Hiza o Nerae" (Japanese: オバケは膝を狙え)	Isoroku Koga	Rintarō Ikeda	Isoroku Koga	July 8, 2025 (2025-07-08)
	"Find the Real Thief!" Transliteration: "Shin-han'nin o Sagase!!" (Japanese: 真犯人を探せ!!)
	"Three Minutes Until Mashiro Explodes" Transliteration: "Mashiro Bakuhatsu San-pun-mae" (Japanese: 真白爆発３分前)
Mashiro's classmate Hayashida visits the office with a request to investigate a spooky ghost that appears near his home. Mashiro has a deep fear of ghosts, but Nagumo convinces her to investigate with him anyway. After a week, Nagumo realizes that Hayashida has a crush on Mashiro, and recorded himself disguised as a ghost to replay the clip each time Mashiro came over because he wanted an excuse to talk to her. Following Hayashida's confession, Mashiro returns with a real captured ghost. Nagumo is held by the Tokyo MPD under suspicion of being an underwear thief, where his former classmate, Soya Mimasaka, is the one interrogating him. However, the person caught on camera stealing underwear looks a lot like Nagumo, so Mimasaka refuses to release him until Mashiro and Nezu set a trap to catch the real thief and bring him to the station. A captured suspect called "Knit Man" reveals he planted a bomb in a nearby parking garage. Mashiro attempts to disarm the bomb, but runs low on time after taking multiple selfies next to it. In the end, she opts to kick it inside an abandoned baseball park. Unbeknownst to Mashiro, Nezu is there taking pictures when the bomb explodes.
3	"Great Detective Asunaro" Transliteration: "Meitantei Asunaro" (Japanese: 名探偵アスナロ)	Kōji Aritomi	Rintarō Ikeda	Katsuyuki Kodera [ja]	July 15, 2025 (2025-07-15)
	"The Ones Who Don't Realize They're Stalkers are the Most Dangerous" Transliteration: "Sutōkā no Jikaku ga nai Yatsu ga Ichi-ban Yabai" (Japanese: ストーカの自覚がない奴が一番ヤバい)
Nagumo laments the fact that he has no money to pay for his office's rent when Yuu Asunaro, himself a young private detective inspired by Nagumo's former exploits, breaks into his office and offers to be his unpaid apprentice. However, Mashiro immediately gets jealous and challenges him to a duel. Asunaro's own assistant, Hana "Maki-chan" Kazamaki, acts as referee. While the two rush off to complete a tiebreaker, Nagumo tells Maki that he has no intention of firing Mashiro and that he happy that he serves as Asunaro's inspiration. Mashiro then manages to win the race by unleashing numerous objects buried somewhere within her sailor uniform and making herself lighter. Asunaro shows up at Nagumo's office again, but this time with a case: to find out whoever is stalking him. After Asunaro goes through clumps of his adoring female fans, Nagumo spots a man in a hoodie stalking him from farther out. After Maki manages to restrain him, the group uncovers that Nezu is the stalker. However, he claims that he was actually spying on the "real" stalker, Asunaro. When Asunaro confesses to watching Nagumo's office over the past month, he escapes from Maki's wrath.
4	"Murder at the Mansion of Screams" Transliteration: "Zekkyō-kan Satsujin Jiken" (Japanese: 絶叫館殺人事件)	Yū Harima	Yūho Togashi	Yū Harima	July 22, 2025 (2025-07-22)
	"Maki-chan and the Generation Gap" Transliteration: "Maki-chan to Jenerēshon Gyappu" (Japanese: マキちゃんとジェネレーションギャップ)		Rintarō Ikeda, Yūho Togashi
Nagumo and Mashiro are invited to a dinner party at a place called the "Mansion of Screams" where the wealthy Nagasaki family was supposedly massacred 15 years ago. As the guests gather inside, Mashiro and Asunaro both assume a mystery is about to unfold. When Mashiro heads outside to check if the rope bridge to the mansion is burning, she accidentally destroys it. Not wanting to admit this, Nagumo and Mashiro play along when another guest suggests there is a killer at the party trying to recreate the family massacre. Asunaro gets dragged into the act and accuses one of the guests, Megumi Shiraishi, of being the killer. To everyone's surprise, she admits to planning her revenge after being the sole survivor of the massacre. Back at the office, Mashiro tells Nagumo that Shiraishi's family was actually alive and Kuroi was at the dinner the whole time, so everyone was misguided at the party. Maki joins Nagumo at a bar and both rant about how modern culture has passed them by. Maki soon realizes she has been too honest about her age and awkwardly tries to take back what she said.
5	"Welcome to the World of Grown-Ups" Transliteration: "Otona no Sekai e Yōkoso" (Japanese: 大人の世界へようこそ)	Rion Kujō	Rintarō Ikeda	Isoroku Koga	July 29, 2025 (2025-07-29)
	"A Midsummer Thriller" Transliteration: "Manatsu no Soriddo Shichuēshon" (Japanese: 真夏のソリッド・シチュエーション)	Naoki Taira
	"Mashiro and the Agent from the Stars" Transliteration: "Mashiro to Hoshi no Ējento" (Japanese: 真白と星のエージェント)	Naoki Taira
Nagumo takes Mashiro to a fancy bar called Tonto. There, the barkeep eventually tells Nagumo that someone has been repeatedly spraying graffiti outside. Nagumo quickly deduces that Veronica, one of the regulars, is the culprit. Afterwards, Mashiro swears never to go back to that bar. An anonymous client sends a request to the Nagumo Detective Agency with an advance payment. As Asunaro and both assistants join them, they suddenly get locked into a building where "Mister X" challenges them to a quiz game. Despite failing most of the questions, which lead to photos of a younger Maki throughout her high school years, Maki and Mashiro combine their talents to uncover the room where Mister X is hiding. Maki then beats him up, while Mashiro runs off in search for the nearest bathroom. Mashiro shows off her latest purchase, an expensive wiretap detector, and finds that someone planted a bug on the floor below. After a while, Nagumo introduces Mashiro to the self-proclaimed "star inventor of Shinjuku," Azuha Hoshino. Azusa uses her latest invention, a megaphone, to overload the audio bug, and the group finds a pizza deliveryman outside clutching his ears in pain as the culprit. The following day, Mashiro uses Azuha's megaphone to wake up Nagumo, but also shakes out multiple thieves who were hiding in the office.
6	"Mashiro Hosts Girls' Night Out" Transliteration: "Mashiro, Joshi-kai o Hiraku" (Japanese: 真白、女子会を開く)	Kazuya Fujishiro	Rintarō Ikeda	Rion Kujō	August 5, 2025 (2025-08-05)
	"Assistant Switch!!" Transliteration: "Joshu Kōtai!!" (Japanese: 助手交代!!)	Kazuya Fujishiro
	"Battle to the Death at 100° Celsius" Transliteration: "Sesshi Hyaku-do no Shitō" (Japanese: 摂氏100℃の死闘)	Rion Kujō
Mashiro hosts a Girls' Night Out with Maki and Azuha at a nearby izakaya. While a drunk Maki refuses to reveal her real age, she does admit that she admires Asunaro and the reason why she that she likes to wear a poncho. Elsewhere, Nagumo struggles with the menu at a different izakaya while Nezu and Asunaro argue with each other. Nagumo gets sick and tired of Mashiro breaking his property, resulting in her storming out and switching places with Maki for a day. Maki helps Nagumo with interviewing the case of someone being stalked and harassed in their neighborhood. Meanwhile, Asunaro and Mashiro are looking for a pervert that has been terrorizing the community. After said pervert appears, Mashiro struggles to catch him, but chases him down to the same neighborhood where Nagumo and Maki are. Afterward, Nagumo admits that he was bored without Mashiro around and welcomes her back. Nagumo tries to enjoy a sauna when an escaped criminal suddenly enters. The two try to one-up each other until an old man fills the sauna with so much steam it knocks both men out. Nagumo wakes up in the locker room to find the suspect was re-arrested.
7	"Nagumo's Grown-up Allure" Transliteration: "Nagumo-san no Otona no Iroke" (Japanese: 名雲さんの大人の色気)	TBA	TBA	TBA	August 12, 2025 (2025-08-12)
	"The Lost Child and Mashiro" Transliteration: "Maigo to Mashiro" (Japanese: 迷子と真白)
	"The Great Detective vs. Phantom Thief, Riverfake" Transliteration: "Meitantei vs Kaitō Ribā Feiku" (Japanese: 名探偵 vs 怪盗リバーフェイク)

Reception

By August 2024, the series had over 900,000 copies in circulation.^[34]

See also

• Senryu Girl, another manga series by the same author
• Tune In to the Midnight Heart, another manga series by the same author