Torres bid farewell to Atlético Madrid at the end of last season after his second spell there, a tear falling down his cheek, to a standing ovation.
A World Cup and European championship victor with Spain, Torres made his final appearance for Atletico as a late substitute in Madrid's Europa League final win over Marseille.
Former Spain striker Fernando Torres has announced he is joining Japanese side Sagan Tosu.
Torres' former worldwide teammate Andrés Iniesta also moved to Japan this summer, joining Vissel Kobe after bidding farewell to Barcelona after spending 20 years at the Catalan club.
After coming through the ranks at Atleti, Torres scored 65 Premier League goals for Liverpool before making a £50million move to Chelsea in January 2011.
His contract expired at the end of the 2017-18 season and he will continue his career in Asia, following in the footsteps of Barcelona legend Iniesta. Torres also fielded offers from clubs in Australia, China, France, Germany and others before accepting the move to Japan.
With the national team, Torres won two European titles and a World Cup, while he also added two UEFA Europa League titles and a UEFA Champions League at club level.
"Sagan Tosu was one of the first clubs to be interested in me, they have convinced me with their sporting project".
"But at no point did I think about moving to another European team".
Torres joins Sagan Tosu with the club in the bottom three after 15 games.