The Osaka Gold Villicanes (Japan Future Baseball League) held a press conference earlier today to announce that they canceled contracts for eight players on the team after they were found to be gambling on baseball. The Gold Villicanes also said that they were questioned by police regarding the eight players. The rest of the team is also being questioned to see if there are any other connections.
According to Gold Villicanes manager Takayuki Murakami, the eight players were found to be betting on NPB games. The team did not reveal the names of the players.
As for how all this came to light, it seems the manager got a call (doesn't say from whom) informing him that there were rumors of players gambling on games. The next day, the team started an internal investigation. Eight players stepped forward and their contracts were canceled on the 19th. On the 22nd, the eight players went to the police.
As of now, it seems that no players on the Mie Three Arrows were involved.
Coming on the heals of the fairly large sumo gambling scandal, this really doesn't come as much of a surprise.