Ken-do has hierarchy system

When I was teens, and in University, I had belonged its Ken-do club. I was not good at sporting and I could not be regular member in University.

In middle high school, I had gotten Sho-dan, first qualification of Ken-do.
In high school, I'd gotten Ni-dan, second class qualification of Ken-do.
When I was 4th grade of University, I've gotten San-dan, third class of Ken-do.
To tell the truth, I'd missed this test at 3rd grade, that was second challenge for that San-dan.

When I was 36 years old, I had teared left Achilles tendon when I practiced as Ken-do team member for Ken-do&Ju-do meeting in its military region.

I had been quit Ken-do after that accident.
I sold all equipments and Shinai swards in auction sites.
That was about twenty years ago.