Since it began, Oha Suta was hosted by famous voice actor Yamadera Koichi until he graduated from the show in 2016. Many Hello! Project artists have starred as cast members on Oha Suta. Kusumi Koharu was a Tuesday regular on the show from 2009 until 2014. Ogawa Saki was an Oha Girl and a member of the Oha Suta unit Oha Girl Maple from 2010 until she left Hello! Project in 2011, in which case Ikuta Erina replaced her until 2012. Tsugunaga Momoko became a Thursday regular from 2014 to 2015. Inoue Rei was an Oha Girl from 2015 to 2016.