Tuilagi was again included in Samoa's squad to the 2011 Rugby World Cup in New Zealand. He started in all 4 pool games and scored a hat trick against Namibia. After the eight years with Leicester, Tuilagi left following the 2011–12 Aviva Premiership season to join NTT Communications Shining Arcs of the Japanese Top League. On 8 May 2014, Tuilagi returned to England to compete in the Aviva Premiership with Newcastle Falcons on a two-year contract, rejoining with his brother Anitelea Tuilagi.
He was arrested on August 26, 2014 in Dublin after presenting himself at Dublin Airport. A European arrest warrant had been issued relating to an assault in a Dublin night club a number of years previously.