Perhaps he hasn't given up 100%. A Nikkan Sports article is carrying the following quote from Iwakuma:
I can't get to down on this. My agent told me that as part of the negotiation process, break downs do happen. I'll wait with hope until the deadline.
According to a report by Sponichi, Hisashi Iwakuma may have given up on playing in the Majors this year.
During yesterday's Fan Appreciation Day, Iwakuma apparently told teammates that it seemed as though he might be returning to the Rakuten Eagles next season. He was also quoted as saying:
I just want to play for a team that wants me. The only thing I was looking for [from the A's] is that feeling. I am Japanese. ... I'll switch gears now. It can't be helped.