Through his varied martial art experience, he developed his own system called Small Circle JujitsuTM. He has been twice inducted in the Black Belt magazine Hall of Fame. He studied under Paul Kaelemakule, Juan Gomes, and Professor Henry S. Okazaki (Founder of the Kodenkan Jujitsu system). His Judo teacher was the Hawaiian Champion, Ken Kawachi who gave him the key to the Small Circle JujitsuTM techniques.

He received his Restorative Massage in 1945 and the Certificate of Mastery (Kodenkan Jujitsu ) from Professor Okazaki on February 22,1948. His wife, Bernice was also a recipient. She is ranked as a Sandan since 1954, now inactive. Professor Jay is also ranked as a 6th Dan in Judo. In 1960,he was named by the Hokka Judo Yudanshakai as "Northern California Judo Coach of the Year". He has produced many national, state, and regional winners. In the 1968 and 1979 National Hi School Judo Championships, two of his pupils won the 120 pound national titles and both were named in the top awards. In 1968, David Quinonez and In 1970 Bradford Burgo both were recipient of the Yamauchi Award" for their outstanding showing when they captured the 120 pound crown.

He was inducted into the Black Belt Magazine's Hall of Fame in 1969 and again in 1990. He was also recipients of many "Hall of Fame and Who's Who" national and international organisation. He was awarded on Honorary Doctorate by the College of Martial Arts Sioux Falls, South Dakota on May 4,1991. Inside Kung Fu magazine named him as one of the 100 most influential martial arts personalities of All Times.

He has taught in 32 countries and was Team Captain that went to China in 1985. He demonstrated on Emperor's Day April 29 th at the Dai Nippon Butokuden at Kyoto, Japan in 1992 He was one of the three men that went to Boputhatswana South Africa in 1992. Tony Maynard and Ernie Boggs were on the team.

He is the Founder of the "Small Circle" style of Jujitsu based on Kodenkan Danzan Ryu Jujitsu. It is based on his ten principles, the transitional techniques, and two way wrist action which is applicable to any style. His effortless application has been used by many women, children, and men in many difficult situations. His son, Leon Jay teaches near London, England. He finds that the Small Circle and George Dillman's Kyusho Jitsu are compatible. In fact, many others have found it to be compatible with almost any style. Professor has named his four inheritors -- Lee Eichelberger of California, Leon Jay of London England, Ed Melaugh of Massachusetts, and Ronald Ogi of Hawaii.

Professor Wally Jay was a student of Professor Okazaki, Juan Gomez, and Ken Kawachi in Hawaii in the early 40's. Professor Jay is known nationally and internationally as the founder of Small Circle JujitsuTM and an outstanding Judo Coach. He has received many awards in the past decades which include "Outstanding Judo Coach", "Northern California Judo Coach" of the year, Black Belt Magazine's "Instructor of Jujitsu" and "Man of the Year"... and featured on the converse of top rated martial arts magazines.

Professor Jay is the head instructor of Jay's Jujitsu Studio, which is also known as Island Judo/Jujitsu Club in Alameda, California. At the age of 80, he travels world-wide teaching seminars on Small Circle JujitsuTM.

Jan De Jong commenced training Tsutsumi Hozan ryu ju jitsu under S.Saito, 8th Dan in Semarang on the island of Java, Indonesia in 1928 . Jan de Jong and his father, also a black belt in the system, were two of the very few non-Japanese to be taught by Saito.

In 1939 he graded 3rd Dan, the highest technical grading in Tsutsumi Hozan ryu ju jitsu and in 1940 he travelled to the Netherlands to further his education. The outbreak of W.W.II interrupted these plans and cut off financial support from his family. In order to support himself he commenced teaching ju jitsu in Rotterdam. For the duration of the war he was a member of the Dutch resistance.

Jan De Jong returned to Indonesia in 1946 and commenced working for the Royal Netherlands Indies Army and then the Indonesian Army as a physiotherapist. Accepted into the aliran (Indonesian for system or style) to learn pencak silat from Soehadi. In 1951 he graded 6th Degree Black Belt in pencak silat.

In 1952 Jan De Jong migrated to Perth, Western Australia, where his school is today. In 1969 he ravelled to Japan and trained in many martial arts schools, including that of Minory Mochizuki in Shizuoka near Mt Fuji, where he graded 1st Dan in Yoseikan aikido and Shotokan karate.

1978 Accepted the position of Chief Instructor and representative for the World Ju Jitsu Federation and the following year, 1979, he accepted the position of Chief Instructor and Adviser to the Australian Special Air Service Regiment.

1982 Jan De Jong was promoted to 6th Dan in ju jitsu. Conducted first teaching tour of Europe which subsequently evolved into an annual occurrence.

1985 Accepted the position of Australian representative for the International Pencak Silat Federation. Two years later, in 1987, he accepted the position of President and National Coach for the Australian Ju Jitsu Association. In 1990 he was awarded the Order of Australia Medal (OAM) by the governor-general of the Commonwealth of Australia for services to the martial arts. The year after he accepted the position of Vice President of the World Ju Jitsu Federation. Celebrated his fiftieth anniversary of teaching ju jitsu professionally. In 1996 he was promoted to 9th Dan in ju jitsu.

George A. Dillman, a 9th degree black belt in Ryukyu kempo Tomari-te, recently touted by Black Belt Magazine as a "Karate pioneer", is one of the USA's best known and well-established martial arts personalities. Dillman came to the attention of the martial arts press when he began competing in the early 1960's. By the middle of that decade, he had started running his own tournament, called the Northeast Open Karate Championships. This competition has been held annually since the first kicked off in Palmer Park, Maryland in 1966. The site was moved to Suitland, Maryland in 1967, and moved again to Reading, Pennsylvania where it was held until September of 1996.

Official Karate magazine (Nov. 1982), described Dillman as "one of the winningest competitors karate has ever know." Dillman was four-times National Karate Champion (1969-1972) and during this period was consistently ranked among the top ten competitors in the nation by major karate magazines. During his nine- year competitive career, Dillman claimed a total of 327 trophies in fighting forms, breaking and weapons. Dillman began serious martial arts training in 1961m with Harry G. Smith. He went on to study with Daniel K. Pai, James Coffman, Sam Pearson, Robert Trias and Seiyu Oyata. Dillman has always considered himself a student, never a master of the martial arts. to this end he and his wife and students have travelled throughout the United States to meet and train with various martial arts experts.

Because of his perseverance, Dillman's martial arts talents have earned him widespread US media coverage. He has appeared on 35 national TV shows, including: Real People, Mike Douglas, PM Magazine, Evening Magazine, and NBC's Sports Machine. Dillman has also been featured five times in Ripley's Believe It or Not, and has been the subject of over 300 newspaper and magazine articles. Dillman, who was a professional boxer for three and one-half years, is the only person known to have trained with both Bruce Lee and Muhammed Ali. In May of 1988, Dillman was inducted into the Berks County Chapter of the Pennsylvania Sports Hall of Fame. He was the first martial artist to be included.

Currently, Dillman travels the world teaching seminars on pressure points and tuite (grappling) hidden within the traditional movements of the old martial arts forms. It is this research and scientific dissection of the old forms that is earning him his most notoriety. Never one to shy away from controversy, Dillman has rediscovered a formerly secret level of meaning for kata movements, and has made that interpretation understandable to all. He has produced a video tape instructional series on the pressure points, and has written three books with Chris Thomas. KYUSHO-JITSU: The Dillman Method of Pressure Point Fighting, has been called "the definitive martial arts book of the century", Advanced Pressure Point Fighting of RYUKYU KEMPO, is said to be "unparalleled among current martial arts literature", and Advanced Pressure Point Grappling TUITE, has been said to be "an extremely practical book of self-defence, blending science with the combative arts..." Ralph Buschbacher, MD. Dillman is chief instructor for Dillman Karate International, an organisation of 85 schools world-wide, with an enrolment of nearly 20,000 students. Dillman has studied under five 10th degree black belts from Okinawa and is currently furthering his personal study through research, practice and the sharing of techniques with Professor Wally Jay, Small Circle Ju-jitsu, and Professor Remy Presas, Modern Arnis.

Hans Greger began training Judo in 1963, Self-defence and Ju Jutsu in 1967. He has also trained Aikido and Karate.

1970 Hans Greger received a task from the Ju Jutsu-Section of SBF to build a new Ju Jutsu system. This resulted in the first book about SBF Ju Jutsu and was published 1976. There was a revision that resulted in a republication in 1985 and another revision and republication in 1994.

Hans Greger is since 1973 the chairman of the Swedish Budo Federations (SBF) Ju Jutsu-Section. He has also been responsible for the education and training of the instructors.

Hans Greger is a Swedish authority in self-defence and has since 1983 been authorised by Swedish police authorities as self-defence instructor.

International, Hans Greger is a well-known instructor and have toured many countries. Hans Greger is both chairman in the European Ju Jutsu Union (EJJU), and in the technical committee of International Ju Jitsu Federation (IJJF).

Ingemar Sköld began training Ju Jutsu in 1969 under Hans Greger. Already in 1974 Ingemar Sköld became instructor on federal level, and has since then been instructing on hundreds of training camps all over Sweden.

1980 Ingemar Sköld was appointed the post as Swedish Chief Instructor and responsible for the development of Ju Jutsu for youth. He has also great deal of interest in the competion-arrangements and had had much influence in its development. Ingemar Sköld himself has several EM titles in Ju Jutsu and is, by his broad experience, self-appointing National Ju Jutsu team-leader.

Ingemar Sköld has influenced the development of the SBF Ju Jutsu since 1972. He was part of the SBF Ju Jutsu-Section board during the whole 90's .

International Ingemar Sköld is a well-known and respected, both as instructor and as fighter.