We can bet on horse at WINS
"KEIBA(horse racing)" is public races that people in Japan can gamble on legally.
and We can bet at gambling station(wins) or at some Racetracks.
in Japan, Major KEIBA is races of JRA(Japan Racing Association). accutually we can see horses running at JRA racetracks all over japan.
the racetracks are at Sapporo(Hokkaido), Hakodate(Hokkaido),Fukushima, Nakayama(Chiba), Tokyo, Niigata, Chukyo(Aichi), Kyoto, Hanshin(Hyogo), Kokura(kyushu) .