On August 2nd, 2008 it was announced on the official website it was announced Ryotatsu had departed due to family issues, stating
"I am leaving because of my family... My wife and children are still in Okinawa, it was a hard decision to come to Tokyo. Now I have decided my family is more important than working hard on a band and aiming for the Budokan. It's become extremely difficult to continue band activities, and be with my family."
It was stated by the band that the member "disappeared" and lost contact abruptly and without official closure.
Although the departure was abrupt, Sex Machineguns stated they would finish the live tour as a three piece. However they hired Sussy as a temporary live member.