History Film / BlackRat

* BladeOnAStick: Ryoka fashions a makeshift polearm out of a length of pipe and a cutting blade he finds in the janitor's closet.

* CreepyCrossdresser: [[spoiler:It turns out that there are actually [[TwoDunIt two Black Rats]]: Ajura's sister Akane, and Keno, who wears the same schoolgirl uniform and rat mask.]]

* ImprovisedWeapon: Ryoka builds a BladeOnAStick out of items he finds in the janitor's closet, and Misato does an excellent job of defending herself against the Rat's [[MacheteMayhem machete]] using only a fire bucket.
* JapaneseDelinquents: Ryota is one, having red-dyed hair styled in a pompadour and pierced ears, wearing his white school shirt open over a black t-shirt, smoking constantly (even in school), and riding a motor scooter. He is also shown to know his way around weaponry and builds a BladeOnAStick to fight the Rat.

* PipePain: Ryota constructs a makeshift BladeOnAStick out of a length of pipe and tools he finds in the janitor's closet. During his fight against the Black Rat, the Rat cuts his weapon in half. Ryoga uses half of the pipe without the blade to keep fighting. He is much more successful with just the pipe and ends up using it to kill [[spoiler:Kengo]].

* SelfOffence: Saki sees a figure wearing the rat mask strangling Kengo and attacks it with [[CrowbarCombatant her crowbar]], not realising that it is her boyfriend Ryota who had put the mask on after taking it off [[spoiler:Kengo]].

* StepfordSmiler: Asuka always smiled regardless of the circumstances, to the point that Kanako called it creepy, and Ryota and Skai both tell her to stop. Shortly before her suicide, she confesses to Kengo that she is not always smiling because she is happy.

* ImprovisedWeapon: Ryoka builds a BladeOnAstick out of items he finds in the janitor's closet, and Misato does an excellent job of defending herself against the Rat's [[MacheteMayhem machete]] using only a fire bucket.

* DeusAxMachina: [[spoiler:Misato]] comes after Saki with a fire axe. As she did not have it with her when she arrived, she must have acquired it inside the school.

''Black Rat'' is a 2010 Japanese slasher film directed by Kenta Fukasaku. It stars Misaki Yonemura, Hiroya Matsumoto, and Rina Saito.

High school student Asuka kills herself by jumping from the rooftop of her school wearing a rat mask. Forty-nine days later, six of Asuka's classmates--Misato, Kengo, Takashi, Ryota, Ryota's girlfriend Saki, and Kanako--receive an e-mail supposedly from Asuka asking them to meet in Classroom 3B at midnight. The six students gather in the classroom and, at midnight, a figure wearing a schoolgirl uniform and a rat mask arrives. The masked figure writes the names of the six students on the blackboard. Remaining silent, the figure communicates through messages written in her notebook. She shows a page saying "Let's start the vengeance", and crosses Kengo's name off the board. She brings a blood-covered Kengo into the room, and announces that she will kill them all.

* TheBenchwarmer: As one of her 'elimination games', the Black Rat tells Takashi that, as he is a member of the school soccer team, if he can block her shot on goal them she will let him go. Takashi protests that he is a 'phantom player' and has never actually been on the pitch.
* BladeOnAStick: Ryoka fashions a makeshift polearm out of a length of pipe and a cutting blade he finds in the janitors closet.

* ExplodingFishTanks: When the Black Rat initially attacks the students in Classroom 3B, a missed swing of her [[BatterUp baseball bat]] shatters the class aquarium. This followed by several close-ups of the goldfish dying on the floor.
* ExternalCombustion: Finally manage to escape from the school, Ryoka attempts to escape on his motor scooter, but the vehicle explodes, killing him.

* ImprovisedWeapon: Ryoka builds a BladeOnAstick out of items he finds in the janitors closet, and Misato does an excellent job of defending herself against the Rat's [[MacheteMayhem machete]] using only a fire bucket.
* JapaneseDelinquents: Ryota is one, having red-dyed hair styled in a pompadour and pierced ears, wearing his white school shirt open over a black t-shirt, smoking constantly (even in school), and riding a motor scooter. He is also shown to know his way around weaponry, and builds a BladeOnAStick to fight the Rat.

* PipePain: Ryota constructs a makeshift BladeOnAStick out of a length of pipe and tools he finds in the janitors closet. During his fight against the Black Rat, the Rat cuts his weapon in half. Ryoga uses the half of the pipe without the blade to keep fighting. He is much more successful with just the pipe and ends up using it to kill [[spoiler:Kengo]].

* RescueEquipmentAttack: When the Black Rat attacks Misato on the roof of the school with a [[MacheteMayhem machete]], Misato grabs a fire bucket and uses it to defend herself. Initially she tosses the water into the Rat's face, then uses the bucket to parry the machete blows, and finally uses the bucket to trip the Rat.

* TripTrap: When the nearly naked Kengo is fleeing from the figure in the rat mask, he trips over a tripwire and falls on to the floor which is covered in broken glass from the shattered fluorescent tubes.

* HoistByHerOwnPetard: [[spoiler:Akane]] [[StaircaseTumble falls down the stairs]] and impales herself on the machete she was trying to kill Misato with.

* TwoDunIt: [[spoiler:It turns out there are actually two different killers wearing the rat mask: Akura's sister Akane, and CreepyCrossdresser Kengo. At the end of the film, after Akane and Kengo have both been killed, Misato dons the mask to kill the last survivor Saki.]]