Shortly after her debut, her younger sister Marika Nakanishi also entered the industry under the name Riku Yamaguchi . The sisters eventually appeared in a joint production released by SOD in December 2011 .
: She officially graduated from the group on November 23, 2008. : In 2010, she debuted as an AV idol under the name Riko Yamaguchi dv1184 akb48 nakanishi rina av debut yamaguchi riko verified
: Her first major release, often titled with references like "The Eagerly Awaited National Idol in Japan AV DEBUT," was released in August 2010 under the label Alice Japan . Shortly after her debut, her younger sister Marika