In 1940, following a brillant demonstration in front of the imperial prince NASHIMOTO, IIZASA KINJIRO,19th soke of the Katori Shinto Ryu, authorized him to become a teacher. From that time, KAWASAKI dojo became a branch of Katori. Master Kinjiro encouraged Master Sugino to spread knowledge of the Katori beyond the Katori and also to write a book on the subject. He prefaced as follows:
"...The social situation her no longer allows us to keep the secrets of the Katori Shinto Ryu doctrine within the school. Since the appearance, in the spring of 1935, of the association for the revival of martial arts in Japan, I feel guilty that I have allowed some of our founders' arts to die out, therefore, I have chosen, as a service to our nation, to show the general public, through the handling of the sabre, certain parts of Shinto Ryu. At the right moment, Master Sugino suggested publishing, with Mme ITTO KIKOUE's assistance, the existing techniques in order to guide the youngest amongst us. I gave him my support and henc this book has come has come to see the light of day. It contains the wealth of the author's experiences conveys the essential spirit of the martial and explains in detail the Omote Waza techniques.It may be used as a manual for beginners or for those wishing to perfect their knowledge. Being published, at this time when, attempts are being made to popularize the martial arts, I feel certain that this book will be of service to future society. Lastely I must express my admiration for the authors and the efforts that they have made.
Signed at Katori, Mid-Autumn 1941.
IIZASA SHURI NO SUKE KINJIRO, 19th descendant of the founder."