Doubt it...the trend is leaning towards softer people and especially in this country, people who love dogs (and other animals) who have lots of money and muscle. Dog fighting is more fair than bull fighting, those cowards stab the bull multiple times before he even enters the ring. Fighting animals is cowardly anyway...why not fight eachother. I'm a big fan of boxing, kickboxing, and mixed martial arts. Much more fun to see 2 semi-intelligent bipeds go at it than a man and a stupid animal or two dogs.
-edit- Andrew C...dog fighting in Japan is very illegal. That's why Tosa Inu were bred to fight silently, they don't growl or bark while fighting because in Japan breaking the law is no joke.