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Mr. Koike
Chara koike

Occupation

Teacher

Relatives

Mrs Koike (mother)

Permanent residence

His flat

First appearance

Hattori saves Kenichi from his teacher

Voiced by

Issei Futamata (1981 anime)
Hayato Nakata (2012 anime; 2013)
Tomokazu Yajima (2012 anime; 2014–present)

Gender

Male

Mr Koike is Yumeko Kawai, Kemuzou Kemumaki and Kenichi Mitsuba's teacher.

Physical appearance[]

Mr Koike is thin and not very tall, with curly brown hair and rectangular glasses. He usually wears a blue suit, though sometimes he wears a white shirt and black trousers. He is rarely seen without a briefcase.

Personality[]

Mr Koike is a mostly reasonable teacher, though at times he can be overbearing and unfair. He can be very shy in front of girls, and went on at least two failed dates, though he found stability in the form of Aiko-sensei.

Despite coming across as a very imposing figure in front of his students, deep inside, Mr Koike is a downtrodden character who lives in fear of his mother and her cakes.

Relationships[]

Students[]

Mr Koike, despite his flaws, cares for his students and their wellbeing. He gets on relatively well with Kenichi Mitsuba, though he is unafraid to tell him off for his misdeeds. He often visits his home to talk to his parents, and mostly ends up being chased out by Hattori and the gang.

Sir

Kenichi and his mother recieve Mr Koike

Kanzo and Shinzo Hattori[]

Mr Koike is a good friend of Hattori's and often confides in him for help - specifically, help in impressing Aiko-sensei. 

Mr Koike also has a good relationship with Hattori's little brother Shinzo; he consoled him when he lost his way home, and also offered to take him back. Shinzo, in return, punished the gang by crying loudly when they attacked Mr Koike, thinking he had kidnapped Shinzo.

Family[]

Mr Koike has a complex relationship with his mother. She occasionally comes to stay at his house, and bakes cakes for him, not knowing that they are his least favourites. Despite all this, she dotes on her son and takes care of him. Mr Koike also looks after his mother when she comes to visit.

It was once implied that he had a son. If he does, then he possibly has a good relationship with him, too. 

Quotes[]

  • "Kenichi!" (catchphrase)

Other information[]

  • Mr Koike enjoys collecting butterflies.
  • He is good at solving Rubik’s cubes.

Gallery[]

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