Allister Cooper, 2011

Continuity mistake: After Kawada gets his bag, he realizes something and returns to the classroom. Tossing the bag back to the soldier who threw it at him, he points to a bag behind him on the cart and tells Kitano, 'That's my bag.' In the next shot, he is pointing to a bag in front of him.

Allister Cooper, 2011

Trivia: In the film, the two transfer students are Kiriyama, the silent killer, and Kawada, the winner of a previous Battle Royale. In the original novel, only Kawada was the transfer student; Kiriyama was in the same class selected for this game of death. He was the main antagonist.

Allister Cooper, 2011

Trivia: In the middle and near the end of the film, Kitano is seen and heard conversing with his daughter over the phone; that voice belongs to Maeda Ai, actual older sister of Maeda Aki, who plays Nanahara's girlfriend Noriko.

Allister Cooper, 2011

Trivia: In the manga, Utsumi Yukie is described as the class president, hence her reputation of the leader is obvious in the lighthouse scene. Lead character Nanahara Shuya, as the deleted scenes show, is the star basketball athlete, hence his popularity.

Allister Cooper, 2011

Trivia: In the bungalow, two female students, Hirono and Mitsuko, are having a beef. Hirono taunts Mitsuko, who loses patience and cries out, 'I've had it! Why does everyone gang up on me, what did I do!' In a website dedicated to the film, it states background information [most likely from the manga] that Mitsuko is the 'class slut', hence Hirono's accusations of Mitsuko stealing her boyfriend, among others, is justified.

Allister Cooper, 2011

Continuity mistake: When Kiriyama beheads Oda with Samurai sword, he is alerted to the noise in cottage where Kawaka, Noriko, and Nanahara are hiding. Inside the cottage, the trio see Kiriyama's blood-stained hand smearing the window. Then, Kiriyama hurls Oda's head, grenade in mouth, through the window and into the cottage. Despite Kiriyama's hand being soaked with blood, Oda's head is clean and spotless. (01:03:30)

Allister Cooper, 2011