---
name: "Sadayuki Murai"
canonical: "https://film.one/person/sadayuki-murai"
fi1m_id: "sadayuki-murai"
imdb_id: "nm0613444"
tmdb_id: 65441
wikidata_id: "Q788148"
roles: ["Writer"]
born: "1 January 1964"
reviewed_on_fi1m: 4
average_fi1m_score: 70
average_as: "writer"
average_over: 4
updated: "2026-09-28T21:06:00.055977+00:00"
licence: "© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL."
---

# Sadayuki Murai

## Identity

Sadayuki Murai

- **Canonical:** https://film.one/person/sadayuki-murai
- **Type:** Person
- **Fi1m ID:** sadayuki-murai
- **IMDb ID:** nm0613444
- **TMDB ID:** 65441
- **Wikidata ID:** Q788148
- **Same entity:** https://www.wikidata.org/wiki/Q788148, https://www.imdb.com/name/nm0613444/, https://www.themoviedb.org/person/65441

Writer. Born 1 January 1964 in Nara, Japan.

## Details

- **Work:** Writer
- **Born:** 1 January 1964, Nara, Japan
- **Active:** 1998–2018
- **Also known as:** 村井貞之
- **Frequently works with:** [Satoshi Kon](https://film.one/person/satoshi-kon.md)
- **Average Fi1m score:** 70, as writer, over 4 titles
- **Fi1m score by decade:** 1990s 82 (1), 2000s 86 (1), 2010s 56 (2)
- **Score spread:** 2 at 80+, 0 at 60–79, 2 under 60
- **Genres:** Animation 4, Science Fiction 2, Action 1, Adventure 1, Drama 1, Romance 1
- **Screen time:** 6 hours of reviewed films
- **Box office:** $5m across 4 films with figures
- **Elsewhere:** https://www.wikidata.org/wiki/Q788148, https://www.imdb.com/name/nm0613444/, https://www.themoviedb.org/person/65441

## Streaming the US now

- **HBO Max:** [*Millennium Actress*](https://film.one/film/millennium-actress.md) (86), [*Perfect Blue*](https://film.one/film/perfect-blue.md) (82)
- **Netflix:** [*Godzilla: City on the Edge of Battle*](https://film.one/film/godzilla-city-on-the-edge-of-battle.md) (55)

For United States; add `?region=XX` for another country.

## Biography

Sadayuki Murai (村井さだゆき) is a Japanese screenwriter. Born in 1964 in Nara, he won the 6th Fuji Television Young Scenario Award in 1993 and made his industry debut that year.

He is known for his screenplays for the animated films *Perfect Blue* (1997), directed by Satoshi Kon, *Millennium Actress* (2001) and *Steamboy* (2004). He has also contributed to television series including *Cowboy Bebop* (1998) and *Knights of Sidonia* (2014), as well as the Godzilla animated films (2017–2018).

Murai has worked extensively in both animation and live-action, and serves as a professor at the Faculty of Anime and Manga Art, Kaishi Professional University.

*Sources: imdb.com, ja.wikipedia.org, en.namu.wiki, trojan-unicorn.com.*

## On Fi1m (4)

- *Godzilla: City on the Edge of Battle* (2018), Fi1m 55, Series Composition, Screenplay — [page](https://film.one/film/godzilla-city-on-the-edge-of-battle.md)
- *Godzilla: The Planet Eater* (2018), Fi1m 58, Series Composition — [page](https://film.one/film/godzilla-the-planet-eater.md)
- *Millennium Actress* (2002), Fi1m 86, Screenplay — [page](https://film.one/film/millennium-actress.md)
- *Perfect Blue* (1998), Fi1m 82, Screenplay — [page](https://film.one/film/perfect-blue.md)

## Complete filmography (54)

Every credit, newest first. Titles without a page can be requested for review on the HTML page.

- *AQUARION Myth of Emotions* (2025), series, as Series Composition
- *Zegapain STA* (2024), Screenplay
- *Garouden: The Way of the Lone Wolf* (2024), series, as Series Composition
- *Kaina of the Great Snow Sea: Star Sage* (2023), Screenplay
- *Kaina of the Great Snow Sea* (2023), series, as Series Composition · Writer
- *SABIKUI BISCO* (2022), series, as Series Composition · Writer
- *Knights of Sidonia: Love Woven in the Stars* (2021), Screenplay
- *Natsume's Book of Friends: The Waking Rock and the Strange Visitor* (2021), Screenplay
- *Pet* (2020), series, as Series Composition · Writer
- *Godzilla: The Planet Eater* (2018), as Series Composition — Fi1m 58, [page](https://film.one/film/godzilla-the-planet-eater.md)
- *Natsume's Book of Friends the Movie: Ephemeral Bond* (2018), Screenplay
- *Godzilla: City on the Edge of Battle* (2018), Screenplay, Series Composition — Fi1m 55, [page](https://film.one/film/godzilla-city-on-the-edge-of-battle.md)
- *Beatless* (2018), series, Writer
- *Godzilla: Planet of the Monsters* (2017), as Series Composition
- *Juni Taisen: Zodiac War* (2017), series, as Series Composition · Writer
- *BLAME!* (2017), Screenplay
- *Zegapain ADP* (2016), Screenplay
- *Knights of Sidonia: The Movie* (2015), as Series Composition · Screenplay
- *Space Battleship Yamato 2199: A Voyage to Remember* (2014), Screenplay
- *Knights of Sidonia* (2014), series, Writer, Series Composition, Supervising Producer
- *Durarara!!* (2010), series, Writer
- *Abashiri Family The Movie* (2009), Writer
- *Box of Goblins* (2008), series, as Series Composition · Writer
- *Natsume's Book of Friends* (2008), series, as Series Composition · Writer
- *Mushi-Shi: The Movie* (2007), Screenplay
- *SOS! Tokyo Metro Explorers: The Next* (2007), Screenplay
- *Kazuo Umezu's Horror Theater: The Wish* (2005), Screenplay
- *Kazuo Umezu's Horror Theater: House of Bugs* (2005), Screenplay
- *Aquarion* (2005), series, as Series Composition
- *Kino's Journey: Life Goes On* (2005), Screenplay
- *Ultraman Nexus* (2004), series, Screenplay
- *Steamboy* (2004), Screenplay
- *Ultra Q: Dark Fantasy* (2004), series, Writer
- *Gilgamesh* (2003), series, Writer
- *Kino's Journey* (2003), series, Writer
- *Space Pirate Captain Herlock: Outside Legend - The Endless Odyssey* (2002), series, Writer, Scenario Writer
- *Millennium Actress* (2002), Screenplay — Fi1m 86, [page](https://film.one/film/millennium-actress.md)
- *Alien Nine* (2001), series, as Series Composition · Writer
- *Millennium Actress: Tracks* (2001), Actor
- *Reign: The Conqueror Movie* (2000), Screenplay
- *Boogiepop and Others* (2000), Screenplay
- *Boogiepop Phantom* (2000), series, Writer
- *Reign: The Conqueror* (1999), series, as Series Composition · Screenplay
- *The Dimension Travelers* (1998), Writer
- *Bubblegum Crisis Tokyo 2040* (1998), series, Writer, Screenplay
- *Thursday Ghost Stories Ghost Club ~ Junior High School Edition 4* (1998), Writer
- *Cowboy Bebop* (1998), series, Writer
- *Perfect Blue* (1998), Screenplay — Fi1m 82, [page](https://film.one/film/perfect-blue.md)
- *Toilet Hanako-san: Secret of the Disappearing Girl* (1997), Screenplay
- *Ultraman Dyna* (1997), series, Writer
- *Nerawareta gakuen* (1997), series, Writer
- *Ultra Nyan: Extraordinary Cat who Descended from the Starry Sky* (1997), Screenplay
- *Eko Eko Azarak: The Series* (1997), series, Writer
- *Toilet Hanako-san: School of Fear* (1996), Screenplay

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© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL. Canonical: https://film.one/person/sadayuki-murai