Semi-interestingly, Sagan striker Cho Dong-geon will become the second player affected by the J.League's new "Iniesta Rule", wherein teams are allowed to change their squad numbers to accommodate a marquee signing.
The 34-year-old has announced via his official Twitter account that he is joining Japanese first division side Sagan Tosu, who are now 17 in the division.
Torres, 34, called time on his career with Atletico Madrid at the end of last season and has been linked with a move to Sydney FC and Chicago Fire, with J-League club Sagan Tosu also said to be in the mix before talks fell through earlier this month.
The World Cup victor had been linked with moves to the A-League and MLS but - like Iniesta at Vissel Kobe - the next stage of his career will be in Japan.
"We have had offers from every continent".
"Sagan Tosu were one of the first clubs to be interested in me, they have convinced me with the project".
"I have had offers from France, Germany and even one from Spain, but at no point did I ever think about going to another European team".
"I hope to make my debut, at home, on July 21, then to be there for many years".
"I wanted a new challenge in a completely different place".
The move was also announced on Sagan Tosu's official website, with the club saying he would be given the No. 9 shirt, which he has worn for the majority of his career.
Torres is following in the footsteps of his World Cup and European Championship-winning team-mate Andres Iniesta, who recently joined Japanese side Vissel Kobe after leaving Barcelona.
After a spell with Italian giants AC Milan, Torres returned to Atletico, where he was able to recapture some of his past glory―even if the goals didn't return.