<P> A total of 20 nations have competed in the WBC proper , with 14 appearing in all four editions . Japan has been the most successful , as the only nation with multiple WBC titles ( 2006 , 2009 ) , the nation with the most wins in WBC play ( 23 ) , and as the only nation to reach the championship round in all four WBCs . The Dominican Republic owns the best overall winning percentage in WBC games at . 750 ( 18 - 6 record ) , bolstered by its 8 - 0 mark en route to the 2013 title . A surprising first - round elimination in 2009 stands out as the Dominican 's only poor showing . </P>
<P> A total of 20 nations have competed in the WBC proper , with 14 appearing in all four editions . Japan has been the most successful , as the only nation with multiple WBC titles ( 2006 , 2009 ) , the nation with the most wins in WBC play ( 23 ) , and as the only nation to reach the championship round in all four WBCs . The Dominican Republic owns the best overall winning percentage in WBC games at . 750 ( 18 - 6 record ) , bolstered by its 8 - 0 mark en route to the 2013 title . A surprising first - round elimination in 2009 stands out as the Dominican 's only poor showing . </P>
who has won the most world baseball classic
who has won the most world baseball classic
Japan
Japan