Yuji Kaneko might not make the opening day roster because of shin splints. He has not played in any games since March 18. He was at the stadium for the Yakult game on March 22, but left to get treatment at Seibu 2 Stadium.
Source: Sports Hochi 3/23/2017
[UPDATE 5/20 @ 12:25am]
Kaneko played in his first rehab game at Ni-gun on May 19. He got the start in right and batted second against Ni-gun Seibu. He hit a single to center and later came around to score in his first trip to the plate and walked in his second trips to the plate.
Source: Sports Hochi 5/19/2017