Aikido Cork Open Centre
Aikido Cork Open Centre

Phone: 085-764 2423


Technical Director Aikido - Chief Instructor/Sensei/Dojo-cho - My Teacher - My Aikido Teachers Along My Aikido Journey - My T'ai Chi Ch'uan Teachers - Official Aikido (Aikikai) Ranking System - Anti-Doping Policy - Aikido Wisdom

Communication through Sight, Sound and Touch
Master the Art of Observing
Find Your Centre


"I saw that Ueshiba Sensei had truly mastered the art of relaxing.  
It was because he was relaxed, in fact,
that he could generate so much power.  
I became his student with the intention of learning that from him."
- Koichi Tohei, 10th Dan


Technical Director Aikido

 Philippe Gouttard, Shihan - 7th Dan 
Aikikai Hombu Dojo



The Cork Open Centre was founded by Decker Sensei, a student of internal martial arts for over 30 years, as a Centre for the study and practice of Aikido and T'ai Chi Ch'uan in Cork City. After living in the United States for 35 years, Decker Sensei returned to Europe in 2009. He received all of his Aikido and T'ai Chi Ch'uan training in the United States.

While studying with two great T'ai Chi Ch'uan Masters in New York City, he began his Aikido journey in 1985 at the New York Aikikai.  He was fortunate to study with and take classes taught by the greatest of the Japanese masters, the students and heirs of Morihei Ueshiba or O'Sensei (Great Teacher), the Founder of Aikido. He studied under Yoshimitsu Yamada Shihan, 8th Dan and Seiichi Sugano Shihan, 8th Dan, at the NY Aikikai, and others, but, it was the genius of Shihan Mitsugi Saotome Sensei, 8th Dan, who set him firmly on the path of Aikido, and opened his eyes to the true magic of AIKI.

Today, Decker Sensei uses a soft approach to Aikido, focusing on connection (before the moment of physical contact, throughout and after) and soft power, light touch – heavy hands, moving away from the use of physical force.   He looks at Aikido as meditation in action and action in meditation, a practice that emphasizes stillness through motion. He looks at the ‘DO’ in Aikido as a nameless process that happens, that changes the student’s shape of thoughts and actions over time, not through words and knowing but through feeling and listening.  

Decker Sensei maintains his relationship with and membership in the Aikido Schools of Ueshiba and frequently travels to the United States to attend Saotome Shihan's seminars. He currently holds the rank of Godan - 5th Dan Aikikai Hombu Dojo, awarded by its Technical Directore Philippe Gouttard Shihan, 7th Dan Aikikai/FFAAA.

Decker Sensei is a authentic lineage teacher in all disciplines he is offering: Aikido, Tai Chi Chuan and Buddhism.  


Chief Instructor and Dojo-cho

Detlef Decker, Godan - 5th Dan Aikikai Hombu Dojo

Master Teacher - T'ai Chi Ch'uan
Master Teacher - Reiki

International Aikido Federation/Aikikai
Aikido Schools of Ueshiba/ASU
Bozeman Aikikai

My Teacher
DSC5616 197x300

Mitsugi Saotome Shihan - 8th Dan Aikikai Hombu Dojo

Mitsugi Saotome Shihan is the Founder and supervisory instructor for more than 100 affiliated Dojos of the international Aikido Schools of Ueshiba association.

Master Saotome has devoted his entire adult life to the study and teaching of Aikido. He began as a special apprentice with the Founder of Aikido, Ueshiba Morihei (O Sensei) in 1955 and continued for 15 years until the Founder’s death in April of 1969.

From 1960 until 1975 Master Saotome taught at the World Aikido Headquarters in Tokyo, Japan. During this period he was accorded many positions, honors and achievements. He appeared publicly at many events in Japan and abroad for the purpose of spreading the understanding and knowledge of Aikido.

In 1975 Master Saotome decided to leave his highly respected position as a senior instructor at World Aikido Headquarters in Tokyo to come to the United States.


My Aikido Teachers along my Aikido Journey My Dan Promotion

Shihan Philippe Gouttard Sensei, 7th Dan Aikikai/FFAAA
Shihan Hiroshi Ikeda Sensei, 7th Dan Aikikai, formerly ASU
Don Lyon Sensei, 4th Dan - Aikido of Arlington (Iwama Aikido) (1952-1996)  
Greg Olson Sensei, 6th Dan Aikikai - ASU Big Sky Aikido
*Shihan Mitsugi Saotome Sensei, 8th Dan Aikikai - ASU
*Shihan Seiichi Sugano Sensei, 8th Dan Aikikai - USAF NY Aikikai (1939-2010)
Shihan Donovan Waite Sensei, 7th Dan Aikikai - USAF Aikido of Center City
*Shihan Yoshimitsu Yamada Sensei, 8th Dan Aikikai - USAF

2015 Godan - Aikikai Hombu Dojo****
2009 Yondan - ASU/Aikikai***
2004 Sandan - ASU/Aikikai**
2002 Nidan - ASU/Aikikai**
1996 Shodan - ASU/Aikikai*

****awarded by Shihan Philippe Gouttard Sensei, 7th Dan Aikikai/FFAAA
***awarded by *Shihan Mitsugi Saotome 
**tested by Shihan Hiroshi Ikeda/promoted by *Shihan Mitsugi Saotome 

*tested and promoted by *Shihan Mitsugi Saotome

*Student of O'Sensei, Founder of Aikido 
Official Aikido Dan Rankings (ONLY one official organization - International Aikido Federation/Aikikai Hombu Dojo, Tokyo Japan)
International Aikido Federation/Aikikai Hombu Dojo
Education/Accredited University Comparison
Shodan - 1st Dan  (Assistant) Associate Degree
Nidan - 2nd Dan (Assistant Instructor) Bachelor's Degree
Sandan - 3rd Dan (Instructor) Master's Degree
Yondan - 4th Dan (Sensei or Teacher) Assistant Professor
Godan - 5th Dan (Sensei or Teacher) Associate Professor
Rokudan - 6th Dan (Sensei or Teacher) Professor/Department Chair
Shihan (Master) Ph.D. or Doctoral Degree
Nanadan - 7th Dan Shihan Head of School
Hachidan - 8th Dan Shihan Head of College




My T'ai Chi Ch'uan Teachers


*Grand Master Don Ahn

masteryu*Grand Master Yu, Cheng-hsiang

*Studied with Professor Chen Man-ch'ing (1902-1975)
Chen Man-ch'ing

Yang Style History
T'ai Chi Ch'uan History/Lineage 


"A person's mind is so powerful.  We can invent, create, experience,
and destroy things with thoughts alone."
- Unknown

"Be the change you wish to see in the world.
What you think, you become.
Where there is love, there is life.
Learn as if you'll live forever.
Your health is your true wealth.
Have a sense of humour.
Your life is your message.
Action expresses priorities.
Our greatness is being able to remake ourselves.
Find yourself in the service of others."
- Mahatma Gandhi, Phrases of Wisdom

"I have decided to stick with love.
Hate is too great a burden to bear."
- Martin Luther King, Jr.


"Each and every master, regardless of the era or the place, heard the call and attained harmony with heaven and earth. 
There are many paths leading to the top of Mount Fuji, but there is only one summit - love."

"Now and again, it is necessary to seclude yourself among deep mountains and hidden valleys to restore your link to the source of life. 
Breathe in and let yourself soar to the ends of the universe; breathe out and bring the cosmos back inside. 
Next, breathe up all fecundity and vibrancy of the earth. 
Finally, blend the breath of heaven and the breath of earth with your own, becoming the Breath of Life itself."

Morihai Ueshiba - Founder of Aikido


Technical Director Aikido:
Philippe Gouttard Sensei, Shihan (7th Dan)
Aikikai Hombu Dojo, Tokyo, Japan

Chief Instructor and Dojo-cho:
Detlef Decker Sensei, 5th Dan
Aikikai Hombu Dojo, Tokyo, Japan

The Cork Open Centre is a holistic learning Centre offering affordable ongoing evening classes, full-day and weekend workshops, and advanced training in Aikido, T’ai Chi Ch’uan, Hanmi Buddhism and Reiki.

Budo by Hiroshi Ikeda

Budo by Hiroshi Ikeda

The Cork Open Centre admits students of any race, colour, age, gender, and sexual preference to all the rights, privileges, programs and activities that are available to all members. We do not discriminate on the basis of race, colour, age, gender, sexual orientation, or national or ethnic origin in our educational and admissions policies. Minimum age requirement for attending Aikido classes is 16 years and for T’ai Chi Ch’uan and Chi Kung (Qigong) classes is 18 years of age. 



Ai - Love by Hiroshi Ikeda


"The Art of Peace"

Study how water flows in a valley
stream, smoothly and freely
between the rocks. Also learn from
holy books and wise people.
Everything - even mountains,
rivers, plants and trees -
should be your teacher.


Morihei Ueshiba, Founder of Aikido

T'ai Chi Ch'uan 
"The Supreme Ultimate"

Knowing others is intelligence,
knowing yourself is true wisdom.
Mastering others is strength,
Mastering yourself is true power.




At least for today: 

Don't get angry.
Don't be grievous.
Express your thanks.
Be diligent in your business.
Be kind to others. 

For improvement of mind and body.
Usui Reiki Ryoho.

The Founder
Mikao Usui 


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