Following the 2011 Tōhoku earthquake and tsunami and subsequent nuclear disaster, during which the team were in a training camp in the south of the country, the club pulled out of the L.League for the remainder of the season. Sameshima then began training with the Boston Breakers in March 2011, before signing for the club permanently, the first former Mareeze player to sign for another club. She made her debut for the Breakers against Sky Blue on 12 June as a second-half substitute for Alex Scott, becoming the first Japanese international to play for the club.