In case you're curious.
http://www.jra-jwc.jp/
It's actually a legitimate 'race' which you can bet on though it's mostly via the web using 'points'. There are also several 'groupings' of animals ranging from 'cosplay' to 'cardboard cutouts' to 'animals' for each race. They claim it's the the race with the 'highest winnings' at around 10 million usd for first place. It's admittedly a bit tounge and cheek. It's essentially a non-gambling version of actual horse racing. Most likely it's simply a very glorified ad campaign to get people to the race track to bet actual money
It's endorsed by the official horse racing organisation in Japan. They even cynically have links to 'beginner clinics' on how to start in horse race betting.
It's not a real game unfortunately in the sense of being on any consumer platform. Feel free to peruse the 'winners' if you like wading hip deep in Japanese.
http://ja.wikipedia.org/wiki/CINEMA_KEIBA/JAPAN_WORLD_CUP