This has nothing to do with baseball in Japan but I thought it might be of some interest.
Seems there were some reported cases of game fixing by some players in the Chinese Professional Baseball League between May and September.
According to evidence collected by the Taipei branch of the Ministry of Justice's Investigation Bureau, the players rigged games in a number of ways, including throwing easy pitches to hit, walking batters, purposely committing fumbles or deliberately striking out.
Once the gambling syndicate run by Tsai cashed in on its bets as a result of the players' actions, it would then pay off the players through intermediaries, the Investigation Bureau believes.
Associated Press: Say it ain't so Tsao: Baseball scandal hits Taiwan
Straits Times: 6 detained in match-fixing probe