A vibration-induced kinesthetic illusion refers to a phenomenon where individuals perceive their body as moving due to vibratory stimulation applied to muscles on the skin. One notable characteristic of this illusion is that its intensity can be influenced by the individual’s motor imagery. Recently, this phenomenon has found applications in virtual reality and rehabilitation. Strengthening the kinesthetic illusion through motor imagery evoked by specific instructions prior to experiencing the illusion could enhance its utility in such applications. In this study, we explored how varying instructions given to participants before they experienced the illusion affected their perception of the illusion. The experimental results demonstrated that participants who were informed about “illusory joint motion” beforehand experienced a broader range of joint illusions compared to those who received no such information. These findings indicate that prior instructions influence the perception of vibration-induced kinesthetic illusions.