I consider myself a Bourbon man and have a pretty fair collection of it. Occasionally I will have a Vodka, Rye, and once in a blue moon some Cognac or aged Rum. I have tried Japanese Whisky about half a dozen times over the last decade (don't remember the brands) and while I thought it was OK, I don't remember thinking to myself, "hey I've got to get a bottle of this stuff".
But like anything else it's a taste that is developed. If I lived in Japan and could only get a hold of Japanese Whisky, I'd more than likely get use to it or find one that I really liked. To me it's just missing something.
I like trying different brands of Bourbon and there are so many made right here in the USA I have little desire to look for foreign libations. That - coupled with my desire to support OUR Country's businesses first - I can honestly say I am more than happy with American Bourbon Whisky. It's one of the few things I feel we are still the worlds leader in manufacturing.