Seibukan Dojo Instructors:

Bill is the Owner and Chief Instructor at the Seibukan Dojo, where he continues to train, teach, and  manage the daily operations of the dojo.

Bill began his training in 1981 in Isshin-ryu Karate, and Sosuishi-ryu Jujutsu. He currently holds the grades of 8th Degree Black Belt (Hachidan), and the title of Kyoshi in Isshin-ryu Karate-do, and also holds the grade of 7th Degree Black Belt (Nanamokuroku), and the title of Shihan in Sosuishi-ryu Jujutsu, 2nd Degree Black Belt (NiDan) in Ryukyu Kobudo-Tesshinkan, and 2nd Degree Black Belt (NiDan) in Judo, certified by the USJA, and certified Yudansha by the Kodokan Committee, Tokyo Japan.

In November of 2025 Bill Was appointed to the World United Isshinryu Karate Association (WUIKA)  Regional Representative.

In May of 2025 Bill was registered and sanctioned to teach Tesshinkan, Ryukyu Kobudo by RyuKyu Kobudo, Tesshinkan President Tetsushi Tamayose, Sensei.

Shitama, Manzo Sensei, 16th Headmaster of Sosuishi-ryu Jujutsu designated Bill Williams Sensei as the Regional Director for the America’s region, of the Sosuishi-ryu Jujutsu Kai, where he proudly represents the Shitama family, and Sosuishiryu Jujutsu.

In April of 2018, Bill was appointed to the Tokubetsu Kaiin, (Special Members) of the Sekiryukan Dojo, in Fukuoka City, Japan by Shitama, Manzo Sensei, 16th Headmaster of Sosuishi-ryu Jujutsu, and Kancho of the Sekiryukan. The Sekiryukan is the oldest dojo in Japan and the Headquarters of Sosuishi-ryu Jujutsu.

In May of 2005, Bill successfully completed the *Senbondori, (test or challenge of 1000 points) that was overseen by the 16th Headmaster of Sosuishi-ryu Jujutsu, Shitama Manzo Sensei, the 16th Dai Menkyo of Sosuishi-ryu Jujutsu who traveled to New York to conduct the senbondori at the Seibukan Dojo.

In 2007, Bill retired as a Highly Decorated Detective Sergeant with the New York Police Department. During his career, he was awarded  over 300 medals and awards, making him half of one of the most decorated teams in the history of the NYPD.

http://www.beyondthelineofduty.com/Hero71PrecinctPartners.html

Bill has been awarded the prestigious NYPD Medal for Valor, for a shooting incident in which he was struck in the head with bullet fragments during an exchange of gunfire with four armed adversaries. Bill was a First Responder at the World Trade Center, and was assigned to supervise a joint NYPD/FBI Task Force investigating the September 11, 2001 terrorist attack.

Bill graduated Cum Laude from Mercy College with a Masters Degree in Organizational Leadership.

Senior Instructor, Sensei Rondy Angoy

Rondy is one of the Senior Instructors at the Seibukan Dojo, and  holds the grades of 6th degree black belt (RokuDan), and the title of Renshi in Isshin-ryu Karate-do and also holds the grade of 6th degree belt (Rokumokuroku), and the title of Shihan-Dai in Sosuishi-ryu Jujutsu, and ShoDan in RyuKyuKobudo-Tesshinkan. He began his training in 1996 in Isshin-ryu Karate, and Sosuishi-ryu Jujutsu. Sensei Angoy is the President of the Sosuishiryu Jujutsu Kai.

In March 2004, and May of 2005, Rondy successfully completed the *Senbondori, (test or challenge of 1000 points) that was overseen by the 16th Headmaster of Sosuishi-ryu Jujutsu, Shitama Manzo Sensei. Rondy is one of the very few students that has ever completed this grueling test of stamina, will power, and spirit. TWICE!

Rondy served in the U.S. Army Reserve from 1994 to 2002, and was deployed to Bosnia and Herzegovina as part of the NATO peacekeeping force for Operation Determined Effort. He studied the Japanese Language at Montclair University, and the Japan Society in New York, and spent a year in Japan studying at Kansai Gaikokugo Daigaku.

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The Seibukan Dojo Teaching Team is on the mat for every children’s class. We are EXPERTS at teaching your children, and we provide a safe, and supervised environment where our students can realize their potential.

Seibukan Dojo Teaching Team:
L-R Sensei Mario, Sensei Rondy, Sensei Bill, Sensei Roberto, Sensei David.

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*Senbondori:
Sosuishi-ryu’s 12th headmaster, Shingo-Munetsuga Shitama, first established this “thousand-point challenge” in 1868. A challenger must face a group of opponents called “yoseko” throwing down one another 1,000 times, a very strenuous task. Only black belts are permitted to attempt this test of sheer endurance.  There is no concept of winning or losing in senbondori, the only thing that is important is to complete it.  354 people in Japan completed this grueling test of stamina, will power and spirit since it’s beginning; two were women. To this day only three percent of the students at the Sekiryukan have successfully completed senbondori. The Seibukan Dojo has conducted senbondori under the auspices of the Sekiryukan since 2004.