Yes it is as are many places in South Korea.
But Japanese folks have a problem gong to Korea after their sordid past treatment of the Koreans and I do not understand why but the Japanese have always had a thing for Hawaii.
I lived on the edge of Seoul and worked at Yong Son for a year there and traveled as much as possible and always had a great time and was treated fabulously by the people wherever i went.
That is true but that is changing. A lot of Japanese tourists visit Korea now. The "Korean wave" is pretty strong in Japan with Korean dramas and Korean popstars gaining lots of popularity there. A lot of Japanese people go to Korea to visit the places where their favorite K-dramas were filmed.
Since Cheju Island is targeted towards honeymooners, there's a certain romantic vibe there as well.
I'm not saying that Koreans don't have issues with racism. It does pop up from time to time. But if I have to compare the stories I have from American ex-pats in Korea vs. people who live in Hawaii, I'd rather go to Korea any day than Hawaii, particularly to raise a family.