Here`s an excellent article on Junichi Tazawa:
What is the solution to this problem? Obviously, baseball is extremely popular in Japan and Japanese baseball is far more than just AAA level. Its not really right for ML teams to essentially turn it into another minor league level. Besides, Japan can retaliate by signing an American amateur or refusing to post their best players. On the other hand, Japanese teams just can't afford to hand out deals like the Yankees or Red Sox can. If Japan and MLB go to war MLB will win.
I don't see how this is going to end well for Japanese baseball. The best competition and the most money is in North American baseball. Can you blame the players?