On the disabled list since June 27, Matsui had declined surgery on his injured left knee in an attempt to return this season. The knee has caused recurring inflammation since mid-June.
"So far, no problems," Matsui said through a translator after the hitting session, which he performed with a brace. "So far, it's looking pretty good."
Matsui had an optimistic outlook on his return, saying if all goes well with the rehabilitation, he could be in condition to play in "about one or two weeks."
"Hideki's trying to fight through this," general manager Brian Cashman said.
Willie Bans is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.