Hey Detective, Your Backpack is Open!

Hey Detective, Your Backpack is Open! (Japanese: 探偵さん、リュック開いてますよ, Romaji: Tantei-san, Ruck Aitemasu yo) is a Japanese television drama series broadcast on TV Asahi. The series ran for eight episodes from January 9 to February 27, 2026, occupying the network's Friday 23:15 to 24:15 time slot.

Production and Broadcast

The series was directed by Shuichi Okita, Keisuke Kondo, and Mari Kawada. The screenplay was written by Shuichi Okita, Keisuke Kondo, and Fumio Moriya. It took over TV Asahi's Friday night programming block following 24 Hours with My Bodyguard Season 2, and was succeeded by Yomei 3Kagetsu no Sare Otto in April 2026.

Plot Synopsis

The story follows Yosuke Ichinose, an inventor and private detective who takes over the private detective agency previously run by his missing father. Utilizing his father's abandoned hot spring inn in Nishigaya as both his living quarters and office, Yosuke fills the space with unusual and surreal inventions. As eccentric clients bring bizarre cases to his doorstep, he works to solve them through unpredictable methods.

Cast and Characters

The series features an ensemble cast portraying the main and supporting roles:

Ryuhei Matsuda as Yosuke Ichinose

Hikaru Takahashi as Aoi Sakai

Koji Ookura as Toshinori Shimizu

Shingo Mizusawa as Kei Muromachi

Yuki Katayama as Kasumi Minami

Tatsumasa Murasame as Maiku

Yugo Mikawa as Kosuke Anayama

Daisuke Moromizato as Yaegashi

Rinko Kawakami as Yukari Kita

Daiki Uyou as Taiyo Tagami

Kitaro as Tobizaru

Mieko Harada as Emi Ichinose

Ken Mitsuishi as Keitaro Shundo