Junpei Yamaoka: Japanese Screenwriter and Television Writer

Junpei Yamaoka (山岡潤平) is a Japanese screenwriter known for his extensive contributions to television drama series, television films, and feature films. Born on September 8, 1983, in Kakogawa, Hyogo Prefecture, Japan, he has built a prolific career collaborating with major Japanese networks such as TV Asahi, Fuji TV, TV Tokyo, and NHK.

Early Life and Background

Junpei Yamaoka was born in Kakogawa, located in Hyogo Prefecture, Japan. Official professional profiles record his birth date as September 8, 1983, and note that his blood type is O.

Screenwriting Career

Yamaoka has worked across various genres, contributing scripts to weekly television dramas, suspense series, and live-action film adaptations. His early television credits include writing episodes for the youth drama series Majisuka Gakuen beginning around 2010. Over the following decades, his portfolio expanded significantly across multiple Japanese television networks.

Notable Television Series Work

Yamaoka's television drama credits span numerous long-running franchises and adaptations. He has written episodes for procedural and mystery dramas such as the Tokusou Nine series on TV Asahi, as well as multiple seasons of Mr. Housekeeper, Mitazono (Kaseifu no Mitazono). Additional television series credits include:

The Metropolitan Police Missing Person Investigation Section (TV Asahi, 2010)
Piece Vote (NTV, 2011)
Tank-Top Fighter (TBS-MBS, 2013)
The Good Listener (TBS, 2014)
Tsuribaka Nisshi (TV Tokyo, 2015)
The Sniffer (NHK, 2016)
Juken no Cinderella (NHK, 2016)
Gin to Kin (TV Tokyo, 2017)
Inspector Zenigata (WOWOW / Hulu, 2017)
Shinjuku Seven (TV Tokyo, 2017)
Daisy Luck (NHK, 2018)
Perfect Crime (TV Asahi-ABC, 2019)
School Police (Fuji TV, 2021)
Women's War: Bachelor Murder Case (TV Tokyo, 2021)
Oshi ga Joshi ni Narimashite (TV Tokyo, 2023)
Marriage Hunter (Fuji TV, 2024)
Going Home with Shibuya-kun (Fuji TV-KTV, 2024)
Private Banker (TV Asahi, 2025)

Feature Film and Television Movie Credits

In addition to serial television dramas, Yamaoka has written screenplays for cinematic releases and television films. His film writing credits include:

Kamen Teacher The Movie (2014)
Peach Girl (2017)
Impossibility Defense (2018)
Honey (2018)
My Boyfriend In Orange (2022)
Romantic Killer (2025)
City Hunter 2 (2027)

His television movie credits include writing for special broadcasts such as Bizarre Tales 2008 Spring Special, Kamen Teacher SP, Murder Standard Score 70, Kirisaki Jack no Kokuhaku: Keiji Inukai Hayato, and Kou Jin on NHK.