According to Osho, he uses different ways of “hurting” (provoking) each disciple to awaken awareness. Appending “ji” to your name is one such deliberate device—an honorific that can either soothe or sting the ego, depending on your conditioning. He addresses you this way to expose attachments to respect and identity, turning your reaction into a doorway to mindfulness.
He adds “ji” to gently poke your ego so you notice it and wake up.