"Kashikoi Tenkogaisha"?

A handsome Taiwanese tourist. The Japanese logo caught my attention.
Apparently, it is one of the popular brands in America...
But what is a "Kashikoi Tenkogaisha"?
I don't understand it even if I translate it...

"Kashikoi" = Serious?
What kind of company is a Tenkogaisha? (Weather company)

I just remembered that Super Dry T-shirts were popular in England.
Hey, there's "Super Dry" on his T-shirt too!!