Half the members weren't even from Hokkaido o_o;; So, it's not really a must factor! At the start (the FIRST Country Musume), Rinne was the only one. Asami and Mai both are, but Miuna isn't. Rika wasn't, but Kon/Miki were. So, it's half and half for the Hokkaido girls VS the others
But CM ni Masao Would. Be. HOT.