Kinpachi is character at Japanese drama.
But, why dose Kinapchi teacher have pupoularity?
The reason is why he has a unique habit of saying and fashions of speaking.
The habit of saying is "Stupid". In the Japanese words, "馬鹿ちん！"
If you don't understand this meaning of this words, please ask me.
And, his fashions of speaking is imitated by many people.
For example, following URL is an imitated animation by Korokke.
Korokke is imitating showman in Japan.
If you go to trip in Japan in March, you may imitate Konpachi teacher.
You will be popular because this season is commencement.