After watching this trailer a couple times I noticed it never once mentions Japan. Not that it's set in Tokyo, not that it has a mostly Japanese cast or that it was made in Japan. It sure sells the destruction Godzilla causes though!
Since the movie was a huge hit worldwide, it's hard to disagree with the ad campaign here. The over the top hype is amazing, and yet it's all pretty accurate. I wonder what seeing this movie in the theater in 1956 would have been like, not knowing there would be so many sequels and even two lame US movie versions of the character.