Kioku Sosa

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Contents:  Season 1SpecialSeason 2


  • Title: 記憶捜査 / Kioku Sosa
  • Title (English): Memory Investigation
  • Tagline: 新宿東署事件ファイル / Shinjuku Higashi-sho Jiken File
  • Tagline (English): Shinjuku Higashi Police Station Case Files
  • Format: Renzoku
  • Genre: Detective, mystery

Season 1

Kioku Sosa
  • Episodes: 7
  • Viewership rating: 6.9%
  • Broadcast network: TV Tokyo
  • Broadcast period: 2019-Jan-18 to 2019-Mar-01
  • Air time: Friday 20:00
  • Theme song: Shiawase no Chikara by ToshI


At the Shinjuku Higashi Police Station, many incidents occur every day and many of them are "untouched cases" that the detectives cannot move even if they are aware of them. A wheelchair detective by the name of Onizuka Ichiro (Kitaoji Kinya) was assigned to the Shinjuku Higashi Police Station. He has a detailed memory of the city of Shinjuku throughout the two eras of "Showa" and "Heisei", and when inferring an incident, he can depict it in his brain as a "city of memory".

Onizuka finds out that there are people who are in trouble due to the "untouched cases" and begins to investigate... Meanwhile, Toyama Saki (Kamishiraishi Mone) who wants to be a detective and the career detective Jin Keitaro (Kazama Shunsuke) are assigned to the same department. The two become Onizuka's legs and the investigation of "untouched cases" begin!

User/Viewer Ratings

(one vote)


Correlation chart
Main Cast
Criminal Investigation Division
Scientific Investigation Section
Community Affairs Division
Metropolitan Police - Criminal Investigation Division

Production Credits

Episode Information

Date Episode Subtitle Ratings
2019-01-18 01 A murder trick revealed by a legendary detective who "remembers all of Shinjuku"!! A revenge for over 31 years and the DNA of a sugi tree? The phantom Kanda River seen on "January 7, 1988"!? 8.3
2019-01-25 02 Forty-nine mysterious dead bones are in the locker!? "Green and red bones" trick 6.8
2019-02-01 03 The mastermind is a "housewife", a revenge murder & the special heron!! A mystery with an escape time of 3 minutes!? 6.2
2019-02-08 04 A disguised murder trick! 1-in-7,000 of the missing is the culprit!? The missing smartphone 6.5
2019-02-15 05 The corpse standing on its head in the theater!? The bloodstains of 2:59 AM... "Strangely shaped" weapon 6.6
2019-02-22 06 The murder trick of the "permanent corpse!"? The White Hat and the Mystery of October 10, 1964 7.4
2019-03-01 07 3.53 million witnesses!? The "Labyrinth" Shinjuku Station great search, police officer poisoning trick 6.8
Average 6.9

Source: Video Research, Ltd.

Autumn 2018 TV Tokyo Spring 2019
Chuzai Keiji Friday 20:00 Shitsuji Saionji no Meisuiri Season 2


Kioku Sosa: Reiwa no Onna Satsujinki
  • Tagline: 令和の女殺人鬼
  • Tagline (romaji): Reiwa no Onna Satsujinki / Reiwa Era Female Murderer
  • Broadcast date: 2020-Jul-27
  • Air time: Monday 21:00


Onizuka Ichiro (Kitaoji Kinya), who was relegated to a wheelchair after a certain incident, was reappointed to the Shinjuku Higashi Police Station after retirement. One day, a mass food poisoning incident occurred in Suga-cho, Shinjuku. Onizuka goes back through his memories and directs Toyama Saki (Kamishiraishi Mone) to "Shinjuku Makita Steel" where poisonous substances are stored. The poison that should have been stored is gone, and suspicion is directed towards Makita Noriko (Otsuka Nene), the wife of the owner of "Shinjuku Makita Steel". Meanwhile, detective Jin Keitaro (Kazama Shunsuke) confronts his manager Tachibana Shuhei (Fukuzawa Tatsuya) over the investigation policy. Against the Reiwa female murderer, Onizuka uses the memories of Showa and Heisei as weapons to solve this difficult case.


Main Cast
Criminal Investigation Division
Scientific Investigation Section
Community Affairs Division
  • Otsuka Nene as Makita Noriko (Yuzo's wife, maiden name "Miura")
  • Sakurai Atsuko as Ito Megumi (Tadashi's wife)
  • Fukuzawa Tatsuya (深澤辰哉) as Tachibana Shuhei (Metropolitan Police Department, Investigation Division 1)
  • Ito Masayuki as Makita Yuzo ("Shinjuku Makita Steel" manager)
  • Rimi as Makita Yuko (Noriko's daughter, Yuzo's stepdaughter)
  • Oka Mayumi as Kusumi Keiko (Nishi-Shinjuku 4-chome resident, tofu shop)
  • Nagisa Aki (渚あき) as Kamata Mitsuko (Sugacho resident)
  • Jinbo Satoshi as Ito Tadashi (Sugacho Nishi Fire Brigade member, victim)
  • Suehara Takuma (末原拓馬) as Iinuma (detective)
  • Fukuzawa Jubun as Watanabe Satoru (Forensics Division, Police Agency)
  • Katayama Seiki as Saeki Muneharu (Sugacho Nishi Fire Brigade member, father of Toshiharu)
  • Iwaki Tatsuya (岩城達也) as Saeki Toshiharu (Sugacho Nishi Fire Brigade member, victim)
  • Seshio (世志男) as Wakuda Yoshio (Sugacho Nishi Fire Brigade member)
  • Kawada Aki as Ito Aki (Tadashi and Megumi's daughter)

Production Credits

Season 2

Kioku Sosa Season 2
  • Episodes: 7
  • Broadcast network: TV Tokyo
  • Broadcast period: 2020-Oct-23 to 2020-Dec-04
  • Air time: Friday 20:00
  • Opening theme song: Hakkiri Shiyouze by Stardust Revue
  • Ending theme song: Joker -Nemuranai Machi- by THE ALFEE


After retirement, Onizuka Ichiro (Kitaoji Kinya), who was relegated to a wheelchair after a certain incident, was reappointed as the chief of the judiciary section of the Criminal Division of the Shinjuku Higashi Police Station, and he spends his days doing work with his subordinate Toyama Saki (Kamishiraishi Mone).

However, Azuma Kanata (Hiraoka Yuta), who came there as the new chief, does not like the fact that Onizuka and others are a part of the investigations. Along with that, he also fights with Jin Keitaro (Kazama Shunsuke) over the investigation policy. A new wind has blown to the Criminal Division of Shinjuku Higashi Police Station.


Correlation chart
Main Cast
Criminal Investigation Division
Scientific Investigation Section
Community Affairs Division
  • Kashio Atsuki as Matsumoto Yugo (victim) (ep 1)
  • Fujita Yumiko as Yoshimura Shiho (victim of fraud) (ep 1)
  • Ishibashi Tamotsu as Toki Reiji (Shinjuku Botanical Garden staff) (ep 2)
  • Toyama Toshiya as Takanabe Eita (victim) (ep 2)
  • Sakata Masanobu as Mikawashima Takashi (Mikawashima Farm staff) (ep 2)
  • Hayashi Yasufumi as Sawada Hiroshi (Saitama Agricultural Research Institute staff) (ep 2)
  • Magy as Sayama Tadashi (Cybercrime Countermeasures Division, Police Agency, victim) (ep 3-4)
  • Tanaka Minako as Kitamura Sae (Cybercrime Countermeasures Division leader) (ep 3-4)
  • Kajihara Zen as Hayashi Yuji (Shinjuku "I" City Center Management Department Manager) (ep 3-4)
  • Haba Yuichi as Kayama Shizuo (Shibuya Kita Police Station, Life Safety Section, Security Chief) (ep 5)
  • Onishi Takeshi (大西武志) as Kasai Yukio (criminal of the murder case from 10 years ago) (ep 5)
  • Tayama Ryosei as Tsukahara Eiji (President of Kasai's company) (ep 5)
  • Miura Rina as Saito Miwa (ep 6)
  • Shaku Yumiko as Ishiba Mitsuko (attorney) (ep 6-7)
  • Miyakawa Ichirota as Mizunoe Yoichi (President of Ikeuchi Tourism) (ep 6-7)
  • Owada Shinya as Oyamada Kaoru (Commissioner-General's Secretariat, Human Resources Division) (ep 7)
  • Naitou Takashi as Higuchi Akira (ep 7)

Production Credits

External Links

Summer 2020 TV Tokyo Winter 2021
Silent Voice Friday 20:00 Keishicho Kyokohangakari Higuchi Akira