The Rakuten Eagles announced today that Tomohiro Anraku was diagnosed with an injury to his right biceps femoris and will require six to eight weeks for a full recovery. He suffered the injury during practices before the Yokohama game on March 22.
[UPDATE 5/2 @ 12:15pm]
Anraku might be able to return to the active roster some time during Inter-league play. He has already pitching in a batting practice scrimmage.
Source: Nikkan Sports 5/2/2017