Chujiro Hayashi was a physician and retired Marine commander. Before he died, Usui asked Hayashi to open his own Reiki clinic and to expand and develop Reiki Ryoho based on his previous experience as a medical doctor in the Navy.
Hayashi opened a school and clinic called Hayashi Reiki Kenkyukai (Institute). After Usui passed away Hayashi left the Gakkai (Reiki society founded by Usui). At Hayashi’s clinic, careful records were kept of all the illnesses and conditions that were addressed.
He also made notes of which Reiki hand positions worked best to treat various ailments. Based on these records and notes, Hayashi wrote the Reiki Ryoho Shinshin (Guidelines for Reiki Healing Method).
This guide was part of the class manual Hayashi gave to students. Hayashi altered the way Reiki sessions were given. Rather than have the client seated in a chair and treated by one practitioner as Usui had done, Hayashi had the client lie on a treatment table and receive treatment from several practitioners at the same time. Hayashi also
created a new system for giving Reiju (attunements).
In addition, he developed a new method of teaching Reiki that he used when travelling. In this method, he taught both Shoden and Okuden (Reiki I&II) together in one five-day seminar. Each day included two to three hours of instruction and one Reiju (attunement).
Hayashi travelled to Hawaii in 1937 prior to the Japanese attack on Pearl Harbor, and was asked by the Japanese military to provide information about the location of warehouses and other military targets in Honolulu.
He refused to do so and was declared a traitor. Hayashi performed seppuku (ritual suicide) in response to the disgrace that his family faced in light of his decision. Hayashi died on May 11, 1940.