Yomiuri Giant first round draft pick Takuya Kuwahara might be having problems with either his shoulder or elbow. The Giants have only told the media that Kuwahara is having conditioning issues with his upper body. He had not been doing any throwing for about two months since the end of Tohto University Baseball League season in late October last year.
Rookie training camp began at Giants Stadium on January 9. Kuwahara has been working out apart from the main group. He will most likely start spring camp with the San-gun rehab group.
[UPDATE 1/16 @ 2:07am]
The Giants decided not to assign Kuwahara to Ichi-gun spring camp because of his upper body problems. They will decide whether to assign him to Ni-gun or San-gun camp as they continue to review his progress.
Source: Nikkan Sports 1/15/2018