Keiji Zero
Keiji Zero (Japanese: 刑事ゼロ, lit. "Detective Zero") is a Japanese television drama series that aired on TV Asahi from January 10 to March 14, 2019. The series consists of 10 episodes and was broadcast in the network's Thursday 20:00 time slot.
Plot
The story follows Rekihiko Tokiya (played by Ikki Sawamura), a skilled detective based in Kyoto. During a pursuit of a suspect, Tokiya falls into a water storage tank at an abandoned factory. Upon waking in a hospital, he discovers he has developed retrograde amnesia. At 51 years old, he has no memory of the previous 20 years of his life, including his career as a detective and his past marriage. While his personality has shifted from a confident investigator to a more timid individual, his commitment to justice remains intact. He continues to work as a detective, approaching cases with a new perspective necessitated by his memory loss.
Production
The series was directed by Takuro Oikawa with a screenplay written by Masashi Todayama. It occupied the Thursday 20:00 time slot on TV Asahi, following the conclusion of The Woman of S.R.I. Season 18 and preceding The Woman of S.R.I. Season 19.

Cast
The main cast includes:
- Ikki Sawamura as Rekihiko Tokiya
- Miori Takimoto as Tomoka Saso
- Susumu Terajima as Ichiro Fukuchi
- Daisuke Yokoyama as Toshiya Utsumi
- Tsubaki Nekoze as Hana Segawa
- Ikkei Watanabe as Tomeo Nemoto
- Naomi Zaizen as Noriko Okuhata
- Tetsuya Takeda as Morio Namatame

Reception
The series achieved an average viewership rating of 11.6% in the Kanto region during its 10-episode run.
Episode Ratings
| Episode | Date | Rating (Kanto) |
|---|---|---|
| 01 | 01/10/2019 | 14.7% |
| 02 | 01/17/2019 | 10.5% |
| 03 | 01/24/2019 | 11.9% |
| 04 | 01/31/2019 | 12.1% |
| 05 | 02/07/2019 | 10.7% |
| 06 | 02/14/2019 | 11.3% |
| 07 | 02/21/2019 | 10.6% |
| 08 | 02/28/2019 | 9.9% |
| 09 | 03/07/2019 | 11.2% |
| 10 | 03/14/2019 | 10.1% |