Matsumoto Eiko (松本英子, born on June, 16 1979) is a Japanese singer-songwriter. Matsumoto debuted in 1999 with the single "Namida no Chikara" but scored her first hit with her second single "Squall". In 2004, she formed the unit ZuTTO with Shinohara Tomoe for only one single. A year later, she married Something ELse member Imai Chihiro and gave birth to the couple's first kid in 2007.