Battle Royale II: Requiem (バトル・ロワイアルＩＩ　【鎮魂歌】, Batoru rowaiaru tsū: "Rekiemu"?), abbreviated as BRII (Bii āru tsū), i s a 200 Japanese, dystopian, action-thriller film. It is a sequel to the 2000 film, Battle Royale, which in turn was based upon a controversial 1999 novel of the same title byKoushun Takami. An extended version of the film is titled Battle Royale II: Revenge.

Director Kinji Fukasaku, who directed the first film, started work on the sequel but died of prostate cancer on January 12, 2003, after shooting only one scene with Takeshi Kitano. His son Kenta Fukasaku, who wrote the screenplay for both films, completed the film and dedicated it to his father.

McKoy Sugie (杉江 松恋, Sugie Makkoi) wrote the novelization of the film.

In the sequel, survivors of previous Battle Royales, led by Shuya Nanahara (the hero of the first film), have formed a rebel group called "Wild Seven". As in the first film, a class of teenagers from Shikanotoride Junior High School (鹿之砦中学校, Shikanotoride Chūgakkō?) are kidnapped by the Japanese government. Instead of stereotypically studious Japanese students, these ninth graders are “a ragtag collection of delinquents and losers from all over Japan,” including tough-guy rugby players and punks with dyed hair. More importantly, many are orphans whose parents or family died in bombings by Wild Seven. After their school bus is diverted to an army base, the students are herded into a cage, surrounded by armed guards, and confronted by their schoolteacher, Riki Takeuchi, who lays down the ground rules of the new Battle Royale game. Wild Seven is hiding out on a deserted island (filmed on Hashima Island), and instead of being forced to kill each other, as in the old Battle Royale, the students are ordered to attack the terrorist group’s hideout en masse and kill the leader, Shuya Nanahara, within 72 hours. Most of the kids are not interested in being forced to avenge their families, but are coerced to fight through exploding metal collars, which their captors can detonate by remote control. The students are also put into 'pairs'; if one student dies, then his or her 'pair' will also die because of the metal collars set to a certain frequency.

The movie also makes many references to the USA and their involvement with the world in the future. According to the film, America has bombed several countries over the years because they "don't agree with them", and had the support of the rest of the world.

Once again, Shuya — accompanied by survivors of previous "Games" — must fight to survive.

The majority of the film is centered around Shiori Kitano the daughter of the teacher from the first film.

The film does not use any elements of Takami's novel, except for a few characters.