0_Apprentice
My kid used to take Karate, but I never learned much about it.
1_Wizard
Ok, let me tell you about it's origin, Karate was brought to Japan in the early 20th century 
0_Apprentice
I know there are different colored belts depending on skill, but I only remember his last one was brown.
1_Wizard
Ryukyuans from Okinawa that went to look  for work in Japan took it there
0_Apprentice
How is it different from other things like Jujitsu, Kung Fu, etc? 
1_Wizard
It was  taught in Japan after the Taishō era.
0_Apprentice
So it's been around for a long time, then.
1_Wizard
yes, in 1922 the Japanese Ministry of Education invite someone to give a demonstration about it