Kotaro Kiyomiya left the Ichi-gun team in Hiroshima and returned to Tokyo on the evening of March 12 because he was feeling pain and malaise in his abdominal region over the last few days. The Nippon Ham Fighters announced on March 13 that Kiyomiya was examined at a hospital in Tokyo and diagnosed with localized peritonitis. He will remain in the hospital for treatment until March 15. The Fighters will re-evaluate their plans for him once he returns to the team.
Kiyomiya had been struggling at the plate. In seven exhibition games, he was 0-for-15 with eight strikeouts.
[UPDATE 3/15 @ 12:17am]
Kiyomiya is apparently feeling better and will not require surgery. He is slated to leave the hospital in March 15 and could rejoin practices as early as March 17.
[UPDATE 3/16 @ 1:14pm]
Kiyomiya was re-evaluated at the hospital on March 15. The Fighters announced on the same day that they are going to delay his return to the team so that he can continue to receive treatment for his condition. He is improving, but needs more time to heal. He will continue to receive treatment at the hospital after his release on March 16. He will be re-evaluated again some time after March 18.