The attacking midfielder has completed a switch to St Mary's on deadline day, joining Ralph Hasenhüttl's squad for the final months of the 2020/21 campaign.
Comfortable playing both centrally and out wide, Minamino will become the latest Japan international to represent Saints, following in the footsteps of Maya Yoshida most recently.
Hasenhüttl said: “I am very pleased to welcome Takumi to our squad for the rest of this season.
“He will help provide another good attacking option, and is importantly the right profile of player for us.
“This will give us some additional depth in our squad at an important time, and I am looking forward to beginning work with him on the training pitch."
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