Masayoshi Kimura
Anime | Manga | Timeskip


Kanji 木村 正義
Romaji Kimura Masayoshi
Alias Justice
Character Information
Birthday June 12 (Gemini)
Gender Male Male
Height 161 cm (5'3")
Weight 51 kg (112 lbs)
Blood Type A
Relatives Unnamed Father
Unnamed Mother
Brave Kimura (younger brother)
School Kunugigaoka Junior High School
Class Class 3-E
Seat Number 9
Occupation Student
Japanese Voice Shunsuke Kawabe (Anime)
Tomohiro Yamaguchi (OVA)
English Voice Jean-Luc Hester (Funimation Broadcast Dub)
Actor Arai Shota

Masayoshi Kimura, (木村 正義 Kimura Masayoshi) is a student in Korosensei's Class 3-E in Kunugigaoka Junior High School.


Masayoshi has dark brownish green hair which spikes up in many ridges ending in a triangular tip and black eyes.


Kimura is one of the relatively proactive students when it comes to assassination and aims to claim the 10 billion yen reward.[1]


It is stated that both of his parents are police officers, and they have a high sense of justice, thus earn him "Justice" as a name. Even if he doesn't like the name and asks them to change it. He was constantly being teased about his first name being “Justice,” and his concentration dropped. As a result, his grades suffered and he was sent to Class E.


He is the main focus of chapter 89:Name Time. Although it is spelled with the general spelling for "Masayoshi", it actually reads as "Seigi" (which means Justice). He hates his own name because people would pick on him because of said name. Kirara Hazama also mentioned that she dislikes her name, while Karma mentions that he likes his. Korosensei then mentioned that Karasuma and Ms. Bitch both refused to say his name, resorting in them having a day which all of them used code names, and they are forbidden from using their real names for the rest of day.

At that point, a mock assassination is done with Mr. Karasuma as their target, in which everyone used code names to call each other. Once |Chiba snipes Karasuma (in which he blocks with a piece of wood), they call upon Kimura to finish him off.

After the mock assassination, Kimura still had doubts about his name. Korosensei mentions that he could change his name if he wanted to, but stated that "Justice" was a better name if he happened to kill Korosensei later on. This makes Kimura think twice about changing his own name, at least until they happen to kill Korosensei.


Running: Kimura has been stated to be the fastest runner in class E.[2]

Mobility: Kimura is considered one of the most adept students at free-running. He was part of the team responsible for distracting Karasuma-sensei during the game of cops and robbers.

Knifework: Kimura scored jointly 4th in the class (along with Hinata OkanoKataoka and Okajima) for Knife training from April to June.


  • His favorite subject is Physical Education while his least favorite subject is Math.
  • His hobby/specialty is running 100-meter dash in 11 seconds.
  • Another of his hobbies is collecting autographs.
  • His favorite food is Homemade Curry.
  • His past club before dropping to Class E was Track Club.
  • He was the only one without a codename during Class E's day with them. Instead Korosensei made the class refer to him as "Justice" which is his real name.
  • He has a crush on Kurahashi.
  • He's prone to colds.
  • During the Civil War, he and Okano were both eliminated after both swung into a net trap behind Hara, subsequently knived by Maehara.
  • In the tankobon extras, his statistics were listed as:
    • Physical strength: 4
    • Mobility: 5
    • Close-range assassination: 4
    • Long-range assassination: 1
    • Academic ability: 1.5
    • Characteristic skill: 5 (supreme runner)


  1. Assassination Classroom Manga: Chapter 5, Cover
  2. Ansatsu Kyoushitsu Chapter 34 page 8


e - d - vKunugigaoka Junior High School
Class 3-E
Faculty KorosenseiTadaomi KarasumaIrina JelavićAguri Yukimura
Students Masayoshi KimuraHinano KurahashiYuma IsogaiHinata OkanoHiroto MaeharaMeg KataokaKotaro TakebayashiToka YadaKoki MimuraRio NakamuraNagisa ShiotaKaede KayanoTaisei YoshidaYukiko KanzakiTaiga OkajimaRinka HayamiTomohito SuginoYuzuki FuwaTakuya MuramatsuKirara HazamaRyunosuke ChibaManami OkudaSosuke SugayaSumire HaraRyōma TerasakaKarma AkabaneItona HoribeRitsu
Main School
Faculty Gakuho AsanoKiyoshi Terai
Students Tomoya SeoTeppei ArakiNatsuhiko KoyamaRen SakakibaraGakushu AsanoKaho TsuchiyaKazutaka ShindōKokona TagawaNobuta TanakaChousuke Takada
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