The 4th Generation Hello Pro Egg members joined Hello Pro Egg on June 22, 2008 at the 2008 Hello! Project Shinjin Kouen 6gatsu ~Akasaka HOP!~ event. The generation consisted of three girls: Fukumura Mizuki, Kaneko Rie, and Takeuchi Akari.
On June 22, 2008, Fukumura, Kaneko, and Takeuchi joined Hello Pro Egg.
In 2010, Fukumura and Takeuchi appeared as back-up dancers in some of Mano Erina's PVs.
On January 2, 2011, Fukumura was announced as a surprise addition to the ninth generation of Morning Musume at the Hello! Project 2011 Winter ~Kangei Shinsen Matsuri~ A gana Live concert. Also in January 2011, Kaneko appeared in Mano Erina's PV Seishun no Serenade as a back-up dancer.
On December 28, 2013, it was reported that Kaneko quit Hello Pro Kenshuusei on December 14, but stayed until December 21 to properly finish the Hello Pro Kenshuusei Happyoukai 2013 ~12gatsu no Nama Tamago Show!~. Both Fukumura and Takeuchi attended the event wearing Kaneko T-shirts.