Stefan Stenudd
Stefan Stenudd
About me
I'm a Swedish writer and aikido instructor, 6 dan Aikikai Shihan, former Vice Chairman of the International Aikido Federation. I've practiced aikido since 1972. I also teach the sword art iaido. Here's my budo bio.


Aikido Techniques

Attacks in Aikido

Ikkyo complete

Tantodori - knife defense

Ki exercises






Jo 31 Kata

Aikibatto sword exercises

Aikido Video Clips

Aikido Photos

My seminars


Aikido Glossary

Ki energy

Tanden, the Center

Aikido Inks

Aikido as Self-Defense

Running a Dojo

Aikido is True

Osensei and Einstein

AikiWeb Columns

Aikido Links

Visitor Response

Aikido på svenska


Attacks in Aikido

Aikido Principles

Die deutsche Version meines Aikido-Buches online

My Aikido Book in Czech

My Aikido Book in Swedish

Other Aikido Books

Aikibatto, by Stefan Stenudd.

by Stefan Stenudd. The aikibatto sword and staff exercises for aikido students explained, with practical and spiritual aspects of the sword arts, equipment for training, and more. Click the image to see the book at Amazon.

QI - increase your life energy, by Stefan Stenudd.
Qi Energy
Increase your life energy, by Stefan Stenudd. The life energy qi (also chi or ki), with exercises on how to awaken, increase, and use it. Click the image to see the book at Amazon.

Stenudd's Blog

Tanto dori

Aikido knife defense techniques

Sometimes on seminars I ask the students what they want me to teach, and mostly the answer is: "Tantodori!" It seems that defense techniques against knife attacks are not done enough in any dojo. Compared to the other aikido curriculum, I would also say that it's a particularly serious matter.

     I am not one to propagate aikido as only a self defense training. Such a goal is far too limited to keep my interest alive. But in the case of tantodori I believe we have to consider those aspects of it. Sadly, it can happen that the aikidoka is attacked by somebody armed with a knife, and then not to have some trustworthy basic training behind oneself may prove to be fatal.

Tantodori - kotegaeshi.

     If we do at all practice knife defense in the dojo, we must take it seriously, or the students might learn reflexes that put them in greater danger than if they had not trained such techniques at all.

     Still, unfortunately, the tantodori of aikido is mostly not very precise when it comes to the details of the techniques - I have seen some terrifying lack of precision and consideration in keiko, even among high grade teachers - and the functionality of what is being practiced can often be questioned.

     This is particularly true about the method with which the knife is taken away from the attacker.

Tantodori. Photo: Ulf Lundquist.

     The photo above has raised some questions. It seems to be a very risky way of dealing with the sharp blade of a knife, when snapping it from the attacker. Maybe so.

     Nevertheless, I prefer this way for two reasons:

     One is that trying to get the knife by grabbing it inside the attacker's fist, risks getting so to speak "into the hands" of the attacker - going to where the attacker is strong.

     The other reason is that one has to understand, when attacked by a knife, that one should not primarily try to protect one's hands and arms, but one's body. It is exactly when people instinctively pull their hands back, to protect them from being cut, that the knife easily reaches the body.

     To avoid this, the hands must learn to risk being cut, to move in between the blade and one's own body.

Tantodori - sankyo.

     Please have a look at the few examples of tantodori techniques on the links below, and let me know what you think of them. Maybe you have better solutions?

     On the photos I only show the actual taking of the knife from the attacker, at the end of the aikido technique. On the video above, though, I show complete techniques. Certainly, there are other ways of doing the aikido techniques. I simply show how I do it.

     In addition to this video, I have also made some video clips of tantodori ikkyo, which can be found here: tantodori ikkyo

     There is a lot of repetition in the explanatory texts, for reasons of safety: what I regard as important instructions are included in every technique, when applicable, in case some readers do not go through them all.

     The photos were taken by Charlotte Wiström, with Anders Heinonen as uke, at the Enighet dojo. We used a wooden tanto, because I do not want to encourage people to practice with sharp steel knives, unless very aware of what they are doing. On the video above, on the other hand, a steel knife is used - for clarity.

Stefan Stenudd

Sankyo on tsuki

Sankyo on yokomen uchi

Shihonage on yokomen uchi

Shihonage on tsuki



Ikkyo video clips

My Aikido Books

Aikido Principles, by Stefan Stenudd.

Aikido Principles

Basic Concepts of the Peaceful Martial Art, by Stefan Stenudd. Aikido principles, philosophy, and basic ideas. Click the image to see the book at Amazon.

Attacks in Aikido, by Stefan Stenudd.

Attacks in Aikido

How to do kogeki, the attack techniques, by Stefan Stenudd. All the attack techniques in aikido explained, and how to do them correctly. Click the image to see the book at Amazon.