Dennis L. Hoare was born in Weehawken, New Jersey on March 28, 1943. He married his high school sweetheart Catharine Mika in 1966. Together they raised two sons, Timothy and Jason. Jason shared his father’s passion for martial arts and would follow in his father's footsteps and earn the rank of San-Dan at the Don Nagle Isshinryu Karate School.
In 1963, Sensei Hoare was accepted as a student by Master Don Nagle at the Mercer Street Dojo in Jersey City, which began his life-long relationship with both Master Nagle and Isshinryu Karate. Sensei Hoare's training with Master Nagle would be placed on hold due to the Vietnam War as he served in the United States Army with the 523rd Military Police from 1964-1966.
Around 1974, Sensei Hoare returned to training with Master Nagle at the Don Nagle Isshinryu Karate School on Central Avenue in Jersey City. In 1978, at the Don Nagle Invitational Tournament, Sensei Hoare competed and won his division, which enabled him to compete for the Grand Championship. His competition effort impressed Master Nagle and he was promoted to Sho-Dan. As an instructor at the Central Avenue Dojo, he was responsible for teaching the adult classes as well as the first children's class. Sensei Hoare had always been a fierce competitor and over the years won numerous awards in tournaments, all the while continuing to explore martial arts, seeking to find the similarities and best techniques and creating a vast knowledge bank.
In 1993, Sensei Hoare received his Hachi-Dan from Master Nagle, an accomplishment that brings him great pride. He had received all his ranks from Sho-Dan through Hachi-Dan from the man who inspired his life-long passion with Isshinryu Karate.
Sensei Hoare holds the rank of San-Dan in Kyusho-Jitsu recognized by George Dillman, Remy Presas, and Wally Jay. He has been inducted into the Okinawa Isshinryu Karate Kobudo Association Hall of Fame. The American Okinawan Karate Association, Inc. has recognized Sensei Hoare several times. In 1997, he received the Silver Life Achievement Award and Master Instructor Award. In 2000, he was inducted into the Hall of Fame and received the Sensei of The Year, and in 2012, he received the Visionary Martial Artist Award. He has been inducted into the USA Martial Arts Hall of Fame and recognized as a Master Instructor by the College of Dans under Master Peter Urban.