Usui Sensei believed that Reiki energy could continue to be developed and one of the methods he recommended to do this was for a student to receive as many Reijus or attunements (also called Placements or Ignitions) as possible. In addition, Usui Sensei asked Chujiro Hayashi Sensei to develop Reiki further, which he did by developing the Reiju process.
There is simply no limit to the benefits that Reiki can bestow on those who are receptive to it. All of us can benefit from it – and so can our children, our parents and grandparents, and our animal companions. Even skeptical-minded individuals who look cautiously at Reiki can benefit from Reiki if they are willing to explore its possibilities.