General · EdgepediaOctober 3, 20265 min read

Lesson of the Evil (悪の教典)

Lesson of the Evil (悪の教典, Aku no Kyōten) is a 2012 Japanese psycho-horror film directed and written by Takashi Miike, adapted from Yusuke Kishi's bestselling novel of the same name. It stars Hideaki Ito as Seiji Hasumi, a handsome and popular high school English teacher who is secretly a psychopath willing to kill anyone who threatens his position, and culminates in a night-long massacre of students at the school before the culture festival.¹^•²

Key fact	Detail
Original title	悪の教典 (Aku no Kyōten)¹
Director and screenwriter	Takashi Miike¹
Source	Novel by Yusuke Kishi, published July 2010 by Bungeishunju³
Japanese release	10 November 2012; 129 minutes; rated R15+; distributed by Toho¹
Lead cast	Hideaki Ito (Seiji Hasumi), Fumi Nikaido (Reika Katagiri), Shota Sometani (Keisuke Hayami)¹
Ratings	IMDb 6.6/10 from about 7,300 users; Rotten Tomatoes Tomatometer 59%⁴^•⁵
Festival screenings	2012 Rome Film Festival competition; International Film Festival Rotterdam 2013¹^•⁶
Sequel status	No official sequel announced as of September 2026³

Spoilers

Plot

Seiji Hasumi, nicknamed "Hasumin" by his students, is a brilliant, good-looking English teacher at a private high school who is admired by students, colleagues, and the PTA alike. His true nature is that of a psychopath, a person with antisocial personality disorder, who kills without hesitation anyone he considers an obstacle and has quietly removed threats to control the school. When a flaw appears in his perfect handling of affairs and his identity risks exposure, he chooses a final means of escape: killing every student staying overnight at the school to prepare for the culture festival.²^•⁷

The film's ending differs from the novel's. In the film, Hasumi survives the culture festival incident and is arrested by police in the act; in the original novel, he takes his own life. The manga adaptation gives a third version of the ending.³

The novel and its reception

Yusuke Kishi published Aku no Kyōten in two volumes in July 2010 through Bungeishunju. The book won the first Yamada Futaro Award and was nominated for the 2011 Honya Taisho (Booksellers Award), drawing a large response from the time of publication.²^•⁸ Kishi, whose other works include The Black House (黒い家) and The Blue Light (青の炎), said he had believed the novel's extreme and gruesome content made film adaptation absolutely impossible, and described his feelings about the realized film as happy yet complicated; after seeing it he said he was left stunned, and endorsed Miike's handling of the violence.⁹

Production and release

Toho announced the film adaptation in March 2012 with Hideaki Ito, known for the Umi Saru (Sea Monkey) rescue-hero series, in his first full villain role, and Takashi Miike, whose credits include Sukiyaki Western Django and 13 Assassins, directing and writing the screenplay.¹⁰^•¹¹ The cast also includes Fumi Nikaido and Shota Sometani, who had jointly won the Venice Film Festival's new actor award for Himizu, along with Kento Hayashi, Kodai Asaka, Erina Mizuno, KENTA, and Takayuki Yamada.¹²^•¹³ The film opened nationwide in Japan on 10 November 2012.¹

Because of its extreme depictions, the film was rated R15+ by Eirin, meaning admission is restricted to viewers aged 15 and over, and it provoked both strong criticism and strong support; actress Yuko Oshima of AKB48 publicly said she "hated" the film after seeing it.¹^•²

Style and music

The soundtrack weaves in several versions of "Mack the Knife", the song from Kurt Weill and Bertolt Brecht's The Threepenny Opera, which Hasumi whistles; the Rotterdam festival catalog described the creepy use of the song as something that "will reverberate in everyone's head for a long time to come".⁶^•¹⁴ The same catalog praised the crafted narrative, art direction, and inventive violence, while the trade paper Screen Daily found the film undone by a lack of suspense even as it called the school massacre sequence compelling.⁶^•¹⁵ The Japan Times noted that the film's 2012 release coincided with worldwide headlines about mass shootings and that it "delights in bloody excess, with Miike's usual black-comic wink".¹⁶

Spinoff and sequel status

A spinoff prequel drama, Aku no Kyōten -Joshō- (悪の教典−序章−), was produced with the film's staff and cast, including Ito and Miike as supervisor, depicting Hasumi's return from a successful career at an American investment bank to become a high school teacher in the period before the massacre.¹⁷

The film ends with the on-screen text "TO BE CONTINUED", which has repeatedly fueled speculation about a sequel, but this text is a directorial flourish reflecting Miike's stated interest in a continuation rather than a production decision. As of September 2026, no sequel to either the film or the novel has been officially announced, and no long-form sequel novel by Kishi has been published.³

Availability and ratings

In Japan the film streams on Amazon Prime Video and U-NEXT (both subscription) and is available for rental on Amazon Video, Apple TV Store, and FOD; as of late 2026 there is no free viewing option.⁷ Audience measures sit in the moderate range: IMDb records 6.6/10 from about 7,300 users, Rotten Tomatoes shows a 59% Tomatometer from three critics with 250+ audience ratings, and the Japanese database Kinenote logs an average score of 66.3 out of 100 from 1,323 users.⁴^•⁵^•¹⁸

References

Initially written Oct 3, 2026 · Reviewed: Oct 3, 2026; Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026; Nov 1, 2026