Series

Unknown

★ 6.3(3)202354m1 season

Unknown is streaming on Netflix, Hulu, U-NEXT, Netflix Standard with Ads and TELESA Amazon Channel in Japan, and available to rent or buy on Amazon Video. Availability checked 12 June 2026.

Where to watch Unknown

🇯🇵 Japan

NetflixStream

HuluStream

U-NEXTStream

Netflix Standard with AdsStream

TELESA Amazon ChannelStream

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Good to know

Release date: 2023-04-18
Runtime: 54m
Language: Japanese
Seasons: 1
Episodes: 9
Network: tv asahi
Status: Ended
Country: Japan
Studio: TV Asahi

About Unknown

Unknown is a 2023 web series in the Drama and Mystery genres, starring Mitsuki Takahata, Kei Tanaka and Keita Machida. It spans 1 season and 9 episodes, and originally aired on tv asahi. It holds an average rating of 6.3/10 from 3 viewers. Below you can see where to watch Unknown in Japan — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Synopsis

Yamihara Kokoro and Asada Toramatsu live in a town that is quite peaceful, until a serial murder case happened where the bodies all had their blood drained out. Five years have passed but the case remains unsolved. Meanwhile, Kokoro and Toramatsu have been in a relationship for a year, but are unable to get married as they are keeping a serious secret from each other. Kokoro is actually a vampire. However, she does not attack humans and live modestly. Toramatsu is a popular resident in the town and is trusted by many. After getting a divorce, Toramatsu got drunk and went back to his old house, where he met Kokoro, the current occupant. As the two continue to keep their secrets hidden, a horrific murder occurs once again in the town.

Seasons (1)

Season 19 eps · 2023

Cast

Mitsuki Takahata

Kokoro Yamihara

Kei Tanaka

Toramatsu Asada

Keita Machida

Keisuke Kagami

Kumiko Aso

Iori Yamihara

Kotaro Yoshida

Kaizo Yamihara

Shinya Kote

Yukio Yoyozuka

First Summer Uika

Matsuri Igarashi

Yuki Inoue

Ren Yamihara

Ryosuke Sota

Daigoro Igarashi

Seiya Osada

Seiya Niwatsuki

Shinya Niiro

Hajime Minamijuji

Yoshi Sakō

Genji Niwatsuki

Themes & keywords

vampireundercover agentassaultsupernaturalromanceco-workers relationshippolice officerthriller

Frequently asked questions

Where can I watch Unknown in Japan?+

In Japan, you can stream Unknown on Netflix, Hulu, U-NEXT, Netflix Standard with Ads and TELESA Amazon Channel. It's also available to rent or buy on Amazon Video.

Is Unknown on Netflix?+

Yes — Unknown is available to stream on Netflix in Japan.

How many seasons of Unknown are there?+

Unknown has 1 season and 9 episodes in total.

Who stars in Unknown?+

Unknown stars Mitsuki Takahata, Kei Tanaka, Keita Machida, Kumiko Aso and Kotaro Yoshida.

When did Unknown come out?+

Unknown is a 2023 web series.

What genre is Unknown?+

Unknown is Drama and Mystery series.