Team owner Shinya Arai told reporters today that Akinobu Mayumi will be returning next season, regardless of the final result. Seems the Tigers actually arrived at the decision a lot earlier and told Mayumi about it before a game against the Chunichi Dragons on 9/8.
Mayumi is currently in the final year of a 2-year deal.
Arai was also asked about the rumors involving the Rakuten Eagles and Hanshin Senior Director Senichi Hoshino. Seems Arai hadn't heard anything about them (at least that's what he told reporters) and said that while he wanted Hoshino to stay on as Senior Director of the team, it was ultimately Hoshino's decision to make.