After permanently joining Juventus, Kosaisan updated his social media.

He wrote: "Hello, Bianconeri. I am very happy and honored to be with you. This is just the beginning of a journey and it will lead us to write an unforgettable chapter together."

"Our story has just begun, but it is enough to make me feel the weight and love that represents this club and these fans. Thank you for your incredible support! We will achieve everything Juventus deserves together."

"Winning in Juventus is not important because it is the only thing worth it."

"Forza Juve, Fino alla Fine!"