"We will be forever grateful for his loyalty", president Andrea Agnelli said in a press conference on Thursday morning.
Many thought the 40-year-old was set to announce his retirement from football but he has sprung a surprise by revealing he is only moving on from the club.
"I am very excited, but I come to this day with happiness and fulfilment".
"In Wojciech Szczęsny Juventus have an excellent goalkeeper, who also has 13 years less than me".
"My brother has always given his all for Juventus and Italy, so I was disappointed when I heard the controversy over his last two friendlies with Italy".
"I would be dishonest if I told you I'm not afraid".
"Only sure thing at the moment is that Saturday I'll play my last game with Juventus".
"After all, players like us, who have lived the game intensely, have to keep their minds occupied and have a reason to get up, something to fight for. I'm proud that up to 40-years-of-age I've tried to express top performances up to expectations and Juventus' name".
Despite previously having opportunities to test his skills in other areas of the world, Buffon turned them down and admits it is a slight regret when reflecting on his career.
"The most stimulating proposal out of the camp was sent to me by the President", he added.
"I would say the next week, after some reflections, I will make the ultimate decision".
Buffon has made 639 Serie A appearances since joining Juve in 2001. Italy's most capped player with 176, the 2006 World Cup victor could make his global farewell on June 4 in a friendly against the Netherlands.