Assassination Classroom is a Japanese action and comedy manga series written and illustrated by Yūsei Matsui. The manga was serialized in Shueisha’s Weekly Shōnen Jump magazine from January 2012 to March 2016, with the chapters collected into 22 tankōbon volumes as of December 2016. A spin-off manga titled Koro-sensei Q! (クーロー先生Q!), created and written by Matsui, has been serialized in Weekly Shōnen Jump since November 2015. An anime television series adaptation by Lerche aired between January 7, 2015 and June 26, 2015 for 22 episodes. A second season aired between March 25, 2016 and September 17, 2016 for 25 episodes, plus an OVA episode released on December 28, 2016. A third season aired from October 7, 2017 to March 25, 2018 for 12 episodes.

Assassination Classroom Plot

The story focuses on a class of students who are trying to kill their teacher, a octopus-like creature named Koro-sensei. He has put a curse on the class such that if they do not succeed in killing him before graduation, then they will all die. However, Koro-sensei is determined to teach his class no matter what it takes, even if it means to sacrifice himself to save them.

How popular is Assassination Classroom anime?

This manga series has sold over 13 million copies as of May 2017. It won the Best Shōnen Manga award in the 35th Kodansha Manga Awards in 2015 and was nominated for the 10th Manga Taishō award in 2014. It was also one of the runners-up for Best Shōnen Manga at the American Anime Awards in 2015 and best Shōnen manga at the French Anim’Est anime festival in 2016. In addition, it won the Seinen Manga Award in 2013 and was nominated for both Seinen and Shounen awards in 2014 by Weekly Young Jump magazine. The anime series was also a success with critics and audiences alike. It was also popular with streaming viewers when it aired in Japan and on Funimation’s English simulcast.

How Much Filler is in Assassination Classroom?

There are a total of 0 filler episodes in the Assassination Classroom anime, which are episodes that do not take place in the manga.

Quick Filler & Canon Lists

Canon Episodes


Filler Episodes

Complete Filler List

#Episode TitleTypeAired
0Meeting TimeCanon11/09/2014
1Assassination TimeCanon01/09/2015
2Baseball TimeCanon01/16/2015
3Karma TimeCanon01/30/2015
4Grown-Up TimeCanon02/06/2015
5Assembly TimeMostly Canon02/13/2015
6Test TimeCanon02/20/2015
7School Trip Time/1st PeriodCanon02/27/2015
8School Trip Time/2nd PeriodCanon03/06/2015
9Transfer Student TimeCanon03/13/2015
10L and R TimeCanon03/20/2015
11Transfer Student Time/2nd PeriodCanon03/27/2015
12Ball Game Tournament TimeCanon04/10/2015
13Talent TimeCanon04/17/2015
14Vision TimeCanon04/24/2015
15End-of-Term TimeCanon05/01/2015
16School's Out/1st TermCanon05/08/2015
17Island TimeCanon05/15/2015
18Action TimeCanon05/22/2015
19Pandemonium TimeCanon05/29/2015
20Karma Time/2nd PeriodCanon06/05/2015
21XX TimeCanon06/12/2015
22Nagisa TimeCanon06/19/2015
23Summer Festival TimeCanon01/07/2016
24Kaede TimeCanon01/14/2016
25Itona Horibe TimeCanon01/21/2016
26Spinning TimeCanon01/28/2016
27Leader TimeCanon02/04/2016
28Before & After TimeCanon02/11/2016
29Reaper Time, Part 1Canon02/18/2016
30Reaper Time, Part 2Canon02/25/2016
31Round Two TimeCanon03/03/2016
32School Festival TimeCanon03/10/2016
33End-of-Term Time/2nd PeriodCanon03/17/2016
34Think Outside the Box TimeCanon03/24/2016
35Let Live TimeCanon03/31/2016
36Secret Identity TimeCanon04/07/2016
37Confession TimeCanon04/21/2016
38Past TimeCanon04/28/2016
39Discord TimeCanon05/05/2016
40Outcome TimeCanon05/12/2016
41Outer Space TimeCanon05/19/2016
42Valentine's Day TimeCanon05/26/2016
43Trust TimeCanon06/01/2016
44Happy Birthday TimeCanon06/08/2016
45Final Boss TimeCanon06/15/2016
46Graduation TimeCanon06/22/2016
47Future TimeCanon06/29/2016

List of episodes for Assassination Classroom in chronological order – Learn if it is worth watching

Episode 1: Assassination Time

Class 3-E is a class of elite assassins. The class is made up of students who have all been hand picked for this class by the government. The prime minister, who is also the father of one of the students in the class, has given them a very important job: to kill their teacher before graduation.

The teacher known as Korosensei is often called “Demon” or “Monster” because he has an IQ of 300 and his tentacles are incredibly strong. It’s said that he has killed over 100 people in his career as an assassin and no one has ever survived a battle with him. He’s never lost in combat and he’s killed everyone who challenged him using his intellect and speed.

He was given the title “Koro-sensei” because he once killed someone by striking his target’s pressure point, causing them to laugh so hard that they died of a stroke. Korosensei has been teaching in Japan for about ten years. He’s currently been given a job to kill the most powerful man alive, and that man is the father of one of Class 3-E’s students.

In this episode, Korosensei is introduced as the new homeroom teacher of Class 3-E and he sets up an assassination game, a war between him and his students. He gives them weapons and tells them that they’ll have a month to kill him. He also tells them that they aren’t allowed to injure one another, meaning that if they want to attack someone they have to kill their target in one hit or else they’ll be expelled from class.

How will the students work together to kill Korosensei before graduation? Will any of them be expelled for injuring someone? Who will try to kill him first? What are his weaknesses? These questions will be answered as the series progresses.

This episode is interesting because we get to see the main character of the series, Korosensei, and we get to see how he interacts with his students. We learn that he’s an assassin and that he’s incredibly dangerous, but also a very interesting person.

Episode 2: Baseball Time

In this episode, Sugino appears to be serious about the assassination, but he also knows that he has failed and goes into a state of despair. However, it is revealed that Korosensei is still watching over him from his hiding spot.

This episode is also interesting in how it foreshadows the events to come, as well as giving hints to Sugino’s character.

This is the first time that a “break” is shown in the series, where Korosensei goes to a baseball game in New York City. It shows that Korosensei has an interest in baseball (though he does not like it) and hints at him being able to go places freely, as well as seeming familiar with America.

The episode also gives another hint at Korosensei’s powers, as well as foreshadowing events to come. The fact that his Batting average is over .500 (which would be impossible for even an experienced baseball player) hints at his true strength; his power.

The episode also hints at Sugino’s character; the fact that he was once on a baseball team and then quit hints at a possible inferiority complex, as Korosensei tells him that he should try again. This foreshadows Sugino’s later development; his dream to be the ace of the baseball team.

The episode also gives hints at Sugino’s crush on Kayano. When Korosensei glances over her, he seems to blush and it appears that he wants to impress her by telling her about the baseball game. The fact that she is on his target list may have also been a hint (though it is likely more because she is an easy target that would distract him than anything).

Lastly, this episode shows the rivalry between Sugino and Nagisa; while Nagisa celebrates Korosensei’s presence, Sugino is frustrated by it.

The episode also shows the class’s (though mainly Sugino and Shiota) development; after their failure, they have a more serious attitude towards Korosensei, but at the same time feel discouraged. Shiota appears to be trying to convince the other students to try again, but this would later backfire as their attempt would be revealed.

Episode 3: Karma Time

In this episode, Karma first meets Korosensei and his class. While Karma only wants to see Korosensei fail, he comes to like him after getting saved from being killed by landing on a rock. After hearing that Korosensei does not kill any student who has a goal, Karma decides to join class 3-E as long as he can kill Korosensei in the end.

Karma is also the first one to discover the octopus’s weakness, but instead of killing him, Karma cooks the octopus into takoyaki for dinner. This episode confirms that Korosensei is known for something other than being an assassin. He is also known for loving octopus and cooking it into takoyaki.

This episode is also the first one in which almost all of the students get to make a special move against Korosensei. Karma’s special move is the “knife hand” where Karma cuts Korosensei’s tentacles using a knife taped on his own hand. Nagisa uses his special move against Korosensei by giving him an octopus-flavored gelato, which is his favorite food.

Korosensei’s class starts to get a hang of their teacher and are becoming more aware of him and his abilities.

It’s interesting as to how Korosensei’s class gradually become aware of his abilities and how he is able to handle them.

Episode 4: Grown-Up Time

The class are introduced to their new English teacher. Because she looks attractive, Korosensei and the class immediately assume that she is in love with him. Irina’s acting skills are demonstrated as she shows her true personality to the class, which includes talking about their weaknesses. She also uses her ability of “Phi Brain” to confuse Nagisa and Karma, who were trying to figure out her weaknesses, with a riddle which only the students can solve.

The students discover the class’s new teacher is one of Korosensei’s assassins sent to kill him. Irina has the ability to manipulate her life energy into a variety of effects, from altering her appearance, to controlling the direction of her bullets. Irina insists that she had already killed many Class 3-E pupils before and it is only a matter of time before she kills them. It is also revealed that Irina can read minds and can use her soul energy to confuse people. Her fighting style is based on Phi Brain and she calls herself as an Ace Detective. She has a group of henchmen who help her in killing Korosensei. She can also teleport to different places like Korosensei.

The students are confused that Irina is a teacher and not an assassin as she seems to be. The students attempt to gather information about her past, however, Irina easily detects their presence and confronts them in the school’s courtyard. She uses her ability on Karma and Nagisa to confuse them and distracts the other students with an illusion. The students then decide to ignore her at school until she begins to kill Korosensei in order to get rid of her. Until then they will believe she is a normal teacher and pay attention in class.

Irina’s henchmen or bodyguards are introduced through this episode, including the female assassin who is more enthusiastic than her male counterpart. She is also shown to be in love with Korosensei and calls him “dear”.

Korosensei’s main weakness, the spot on his head, is shown to the class for the first time. He tries to aim at Irina but he gets distracted by her large busts that she reveals in front of him. He then proceeds to go on a trip to Vietnam and orders Vietnamese coffee, however, Irina is able to play along and make it look like he disappeared from a group of students’ sight.

This episode is the introduction of Irina Jelavić, one of the assassins sent to kill Korosensei. She is also the new English teacher of Class 3-E. The students immediately discovers that she is an assassin when she openly reveals her ability to control soul energy and read minds. She is shown to be confident in killing Korosensei and even tells him several times throughout the episode that she had already killed a lot of his previous students. However, even though she clearly shows her true colours to the class, it doesn’t stop Korosensei from being attracted to her especially when she reveals her large busts in front of him. It is also revealed that Irina can use her soul energy to confuse people and recreate illusions.

Episode 5: Assembly Time

Episode 5 Assembly Time is a filler that provides an introduction to the Class 3-E students. The episode also teaches Manami how to improve her communication skills. In addition, the episode teaches Nagisa on how to handle situations he may face in the future. The plot of this episode is similar to Episode 6. In both episodes, teachers from a different class become envious of Class 3-E and attempt to harm Korosensei. However, this episode occurs before Episode 6 and does not add much to the main storyline of the series.

This episode focuses on Class 3-E’s homeroom teacher, Irina Jelavic, and part-time teacher Karasuma.

Nagisa Shiota teaches Manami Okuda on how to improve her communication skills. He does this by helping her with an assassination attempt on their teacher, Korosensei. Nagisa provides a plan for Manami to use a poisonous liquid to kill Korosensei. However, Nagisa is unaware that Manami also wishes to improve her communication skills. Ultimately, the plan fails as Korosensei transforms into a speedier liquid form and pursues Manami throughout the school as she attempts to explain herself.

Korosensei shows his support for Class 3-E by disguising himself as a scholar to provide extra copies of handouts previously not given to Class 3-E. He later shows his support again by providing Manami with an antidote to the poison she used.

Nagisa takes the opportunity to use his experiences in Class 3-E to handle himself against two bullies from the main campus.

The episode ends as Class 3-E travels from their old campus to the main campus for an assembly.

Let’s take a look at some of the notable episodes in chronological order that are not fillers, but still interesting nonetheless. 

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