The Japan international's contract expires this month.
Galliani said: "The transfer market is a fluid and dynamic thing, so you can rarely predict what is going to happen.
"As of today, I can say there is one certain arrival and one probable, though out of respect for the Russian club where he's now playing I cannot say more.
"There could also be some exchanges and I can't rule out surprises that even I do not know about right now."
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