Tanaka missed 2 1/2 months last year while rehabilitating a partially torn ulnar collateral ligament in his right elbow. He returned for two late-September starts.
''I feel it is healed,'' Tanaka said Friday through an interpreter. ''I am able to throw the ball absolutely fine.''
Tanaka threw 21 pitches in his first bullpen session Thursday and plans to be back on a mound Sunday.
''At this point I feel like he's in pretty good shape,'' Yankees manager Joe Girardi said.
Signed to a $155 million, seven-year contract, Tanaka went 13-5 with a 2.77 ERA in 20 starts.