The Hanshin Tigers are thinking about installing a Trackman system at Koshien Stadium. If they decide to install the system, it will most likely be after the current season.
The Chiba Lotte Marines are still on the fence about whether or not they can effectively use the system. They are the only team in the Pacific League that has not installed a Trackman.
Source: Sponichi 4/25/2017
[UPDATE 6/21 @ 12:36pm]
The Tigers are leaning toward installing a Trackman system at Koshien Stadium. However, they learned that the material used in the netting behind home plate does not work well with the system. If they are going to install the system, they will first have to replace a portion of the netting.
[UPDATE 9/20 @ 4:53pm]
The Tigers are thinking about sharing Trackman data with fans, assuming they install the system. They feel it could add a new layer to the game for their fan base.
Source: Daily Sports 9/20/2017