Van Dijk was heavily linked with a big-money move to Liverpool in the summer.
But Southampton stood firm and refused to sell the Holland international, despite him handing in a transfer request at St Mary’s.
The 26-year-old centre-half has returned to first-team action in recent weeks after being out with a foot injury since January.
And Yoshida, Van Dijk’s partner in the heart of defence, believes the former Celtic man is back to enjoying life at the south coast club.
Virgil Van Dijk (if he makes the move this summer)
“He is enjoying every day, I think he smiles a lot”
Ahead of today’s Premier League game with Brighton, Yoshida said: “He is good. He is enjoying every day. I think he smiles a lot.
“It is very comfortable with him – he never brings any negativity. That’s his future, his decision. But in this moment he is really comfortable, I think.
“It is tough for him but the most important thing is he is with us now and he puts everything on it with Southampton. That is the most important [thing].
“Maybe in the future something will happen, but at this moment he gives everything to the club. That is very good.”