Mariko Yamamoto (山本 万里子; born 12 October 1983) is a Japanese former cricketer, who has played for the women's national cricket team. She was part of Japan's squad for the 2011 Women's Cricket World Cup Qualifier and the 2013 ICC Women's World Twenty20 Qualifier.
Known mainly as a right-handed batter, she bowls right-arm medium. Yamamoto was a member of the Japanese team that won the bronze medal in the women's cricket competition at the 2010 Asian Games in Guangzhou.
She attended Chuo University and works as a bank teller.