Isegahama stable
Tamanoshima was born into a sports family. Not only was his father a former professional boxer, but he is the nephew of former "ōzeki" Kiyokuni and his older brother is the former "jūryō" wrestler , who made his debut in the same tournament as Tamanoshima, also as a "makushita tsukedashi" entrant, retiring in January 2008. He and his brother had the option to join Isegahama stable, then run by their uncle, but they chose the more successful Kataonami stable instead. They were the first pair of brothers to join sumo as "makushita tsukedeshi".