Welcome to Budokai

1959- It was around this time that Judo Senseis' like Jim Wilson and Don Links of the old Don San Judo Club on Court Street were teaching Judo in Hamilton. 


1965- John K. Purvis (Frank's Sensei) founded the Hamilton Judo Club. Mr. Purvis is credited as being the “father” of Hamilton Judo; Sensei Purvis had a dream of putting Hamilton on the judo map nationally. He was responsible for importing Mr. Young Nam Chung to Hamilton, an All Korean Champion who became the Head Instructor. 

1971- Mr. Purvis invited Mr. Chung’s younger brother, Young Jin Chung, (also an All Korean Champion) to come and join the instructional staff at the Hamilton Judo Club.  Young Jin Chung stayed about 3 years and then opened his own Judo/Karate Schools in Dayton. 


1985- Current Sensei, Frank Herzog, took over as head instructor.   


2011- The Hamilton Judo Club changed its name to Budokai Judo & Jiu-Jitsu and became a member of the North America Jiu-Jitsu Federation. The Jiu-Jitsu program was overseen by Sensei Frank Herzog 7th degree Black Belt  and Rob Gerhardt 3rd degree Black Belt.

2012- Bill Nagase, 7th Degree Black Belt and father of Texas Judo decided to join our legacy. Also, John K. Purvis, Hachidan (8th Degree Black Belt) from Florida and the original founding father of Hamilton Judo, also joined us. The Budokai Judo & Jiu-Jitsu Promotional Board promoted Sensei Denver Grey to Rokudan (6th Degree Black Belt).  

2012- Master Rob Gerhardt (6th Dan Black Belt) began overseeing the Budokai Taekwondo program.

2017 -  Budokai Taekwondo opened at 4103 Hamilton-Middletown Rd. Liberty Township Ohio 45011. Master Rob Gerhardt (6th Dan Black Belt) is the Chief instructor of Budokai Taekwondo and personally oversees all aspects of TKD, Hapkido, and Jiu Jitsu instruction.


2018 - Master Gerhardt became an affiliate of the International Jiu Jitsu Alliance and had his 3rd Degree Black Belt certified. He was also awarded his Brown Belt in Brazilian Jui Jitsu under Professor Ralph Villa of the IJA.  ​

Our History