Maybe the Tokyo Disneyland has better restaurants, the ones in Florida's Disneyland ranged from mediocre to inedible to me.
The meals I had at Tokyo Disneyland and DisneySea to my recollection didn't taste anything special compared to any other restaurants in Tokyo, although the presentation was 10 out of 10. Mediocre, maybe, but never inedible, but in the end taste is subject to one's preferences.
I've never been to any Disney parks in the USA, but from I heard, Tokyo Disneyland restaurants are as overpriced as the American counterpart.