 On 11 January 2012, Scuderia Ferrari announced that Hamashima moved to the team and took a role in its technical department to improve the interaction of the Ferrari car and its tires.Hamashima left Ferrari at the end of 2014.On 5 March 2015, MediaDo Kageyama Racing (owned by Masahiko Kageyama, who finished in 3rd place at the 1998 24 Hours of Le Mans with Kazuyoshi Hoshino and Aguri Suzuki) announced that Hamashima had become a special advisor to the team.