At a press conference in South Korea's capital Seoul on Saturday, he said the decision to leave Spurs was the "toughest" in his career and that the club supports him in his desire to switch to another club.
I came to north London as a child, 23 years old, such a young age. A young guy, who couldn't even speak English, came to London and to now leave this club as a grown man is something I am proud of, said Son.
He also praised Spurs fans and thanked them for their support.
I want to say thank you to all Spurs fans who have given me so much love and made me feel at home.
Spurs meet Newcastle United in a preseason match on Sunday in Seoul, in what could thus become Son's last match for Spurs.
Spurs captain did not give any indication of which club he will play for next, but there have been rumors of a move to the USA and there have also been reports of interest from clubs in Saudi Arabia.
33-year-old Son has been one of the Premier League's biggest stars and has scored 173 goals in 454 competitive matches for Tottenham.
