大島優子
On February 26, 2006, Umeda passed the second generation auditions for AKB48, and became one of 19 founding members for the group's Team K. Her on-stage debut was on April 1. She performed on the title track for AKB48's first single on a major label, "Aitakatta", released on October 26, 2006. As part of Team K 1st Stage, she was a front member for the song "Skirt, Hirari", along with Sayaka Akimoto, Yuko Oshima, Sae Miyazawa, and Kana Kobayashi.