Mari Yaguchi
On January 30, 2005 - then-leader and the last member from the first generation Kaori Iida left to pursue a solo singer/artist career, with Mari Yaguchi taking on leadership role with Hitomi Yoshizawa as subleader. Her last single was "The Manpower!!!", which sung about the abilities of the human race and was also the Tohoku Rakuten Golden Eagles theme song. The beginning of 2005 also saw the beginning of Musume Document 2005, which covered behind-the-scenes material, historical footage, and interviews.