水木一郎
Ricardo participated in-studio with JAM Project for the first time in 2005, starting with "Neppu Cybuster Shippu!". In 2006, he performed as part of the group with the original leader Ichirou Mizuki on another single, "Stormbringer". Shortly after in 2007, he shared the stage for the first time in the group's fourth live concert, "JAM Project JAPAN CIRCUIT 2007 Break-Out".