I was today old when I learned that American hot dogs commonly have beef in them.

So I see that Costco’s hot dog story began in 1984 when their supplier provided a hot dog stand to commence trials of their cooked and breaded product. The name of this business? Hebrew National.
https://www.mashed.com/103084/dont-k...cos-1-hot-dog/

Apparently Costco brought the beef sausages over to Japan but local customers didn’t take to them and so Costco continued with the pork kind.
source: https://snowlady.typepad.com/the_sno...-in-japan.html