What does 'kokusai' mean?

I know it translates as 'international' but is there any other meaning when it's used by a skijo?

I was looking at the Akakura Kanko website and it has this:

昭和12年12月12日、日本で最初に国際スキー場として指定を受けたＡＫＡＫＡＮ（赤倉観光リゾートスキー場）

The first international skijo in Japan? What does that mean then?