The Seibu Lions received the $51 million from the Red Sox, and plan on using the money to improve the team. However, it won't be used to pay for the criminal activity of the owner:

Last year, a Japanese court convicted team owner Yoshiaki Tsutsumi of insider trading and falsifying company records.

Seibu's parent company, Seibu Railways, was given a $1.73 million fine, while Tsutsumi's privately owned company Kokudo Corp., was fined $1.3 million.

I suspect the team is throwing a nice party right about now.