The union planned to negotiate with Major League Baseball (MLB) next month for the planned 2013 WBC following a decision, which drew overwhelming support from members, local media reported.

"We are not saying we don't want to take part," union president Takahiro Arai said. "But we will not be able compete under the current conditions, which are unfair." Japan won the first two editions of the WBC in 2006 and 2009. However, the Japanese players received only 13 percent of total revenue from the last tournament, compared to the 66 percent the MLB and its players took.

The owners of Japan's 12 professional teams decided last week they too would seek an improved deal with the MLB.