Sho Nakata felt some discomfort while playing catch on February 5 (local time) and was later examined at a hospital. The Nippon Ham Fighters do not think Nakata’s condition is serious. They believe he will be fine if they shut him down from throwing for a few days.
[UPDATE 2/7 @ 4:10pm]
Nakata was examined at a hospital in Arizona on February 5 and 6 (local time) and diagnosed with inflammation in his right shoulder. He will be shut down from throwing at least until the start of the third block of camp on February 10.
[UPDATE 2/9 @ 2:38pm]
Nakata ended practices early on January 8 to get an injection to help him deal with the pain.
Source: Nikkan Sports 2/9/2018