According to Nikkan Sports, Hiroki Kokubo is frustrated that the Softbank Hawks never contacted him about his international FA option.
Said Kokubo, "It seems they spoke [Tamura] right away, but nothing on my end. And so I wondered, what would the team do if I exercised my FA option. They should have contacted me as well. My four year contract is up and I'm not sure if I'm even needed here."
The Hawks, on the other hand, aren't saying much to the media, other than that they just expected Kokubo to return.