User blog comment:Jrp04f/What is an "SP"?/@comment-3261811-20110517102451

No. An SP is a member of the Japanese Police force. Sayoko calls herself one as it was what she was trained for, and the sort of job she fulfills. Being a ninja would imply that she is spying on Lelouch and Nunnally, or acting as an assassin, which is clearly not the case. However, the Security Police would have been disbanded after the conquest of Japan. The Emperor has the Rounds and his personal Royal Guard.