Kohei Arihara (back strain) pitched in his first rehab game at Ni-gun on April 20. He got the start against the Futures and tossed two shutout innings. He could return to the active roster for his next start if there are no lingering problems with his back. His next start could either come against Rakuten (two-game series at Sapporo Dome beginning on April 26) or Lotte (three-game series at QVC Marine beginning on April 29).
Source: Nikkan Sports 4/20/2016