Kenzenkai Dojo

Kenzenkai Dojo Welcome to the Kenzenkai page. Kenzenkai is an Iaido school run by Sensei Karl Groeger. What does Kenzen kai mean? Season 1 episode 1.

Sensei Karl Groeger has over 30 years in Japanese Martial Art training. ABOUT OUR DOJO NAME:

A letter from our Soke Atushi Shimojo from Kyoto Japan. Dear Karl San
Yes, I thought "Kenzen kai" 剣禅会　
will be the dojo name I give to you. You can control your opponent with a sword（剣）, but you can also control your opponent with the spirit of Zen(禅）, your mind. In other words , the training of both the

mind and the sword is the Kenzenkai dojo.

剣禅会の意味は？　剣をもって相手を制することができるが、禅という心を持って相手を制する。すなわち心の修業が剣禅会である

ABOUT SENSEI KARL GROEGER:

Sensei Karl Groeger has over 30 years of martial arts training. He holds multiple black belts in Karate, Ju Jitsu and Iaido. He currently holds the rank of 6th degree black belt. Sensei Karl has received his 6th degree black belt certificate from Soke Shimojo in Iaido. These certificates were received in Japan. Soke Shimojo is Sensei Karl’s Iaido instructor in Japan and is the head of the international Dai Nippon Iaido Kyokai organization. Sensei Karl is the USA director for this organization. Sensei Karl still competes multiple times a year in Martial Arts competitions. He teaches private lessons and group lessons. He teaches multiple schools, or ryus, of Iaido but concentrates mostly on Muso Shinden Ryu. For more information please contact him at [email protected]

You may have seen Sensei Karl on the Histroy Channel - FORGED IN FIRE PRESENTS KNIFE OF DEATH. He was the first competitor on the competition show on the History Channel.

01/12/2026
Merry Christmas to all the warriors.
12/26/2025

Merry Christmas to all the warriors.

12/20/2025
11/11/2025

Tatsuya Nakadai (1932–2025)

Excited and honored to be teaching an Iaido class at my friends dojo tomorrow. L.I NINJUTSU CENTERS
10/15/2025

Excited and honored to be teaching an Iaido class at my friends dojo tomorrow. L.I NINJUTSU CENTERS

My swords. 37 years of training. Each one has a wonderful story. Ask me about any. What’s your favorite one?
10/14/2025

My swords. 37 years of training. Each one has a wonderful story. Ask me about any. What’s your favorite one?

Address

33 Brookvale Avenue
West Babylon, NY
11704

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