#51 Kara-ashi 空足を踏む


When going up and down a staircase in dark, you may lose the balance of the body by mistaking the height of the stairs. Also, if your feet stumble with a stone, you will take several steps to keep balance.

Such an unavoidable wasteful movement is called "Kara-ashi" in Japanese.

In Aikido, there is always a process of breaking the balance of “Uke” before applying techniques, and the beauty of the technique depends on how you let “Uke” take wasteful steps “Kara-ashi”.

In other words, "Uke" needs to accept the process of wasteful steps "Kara-ashi". Since it repeats the same act in practice, it is very easy to avoid mis-steps, but then the meaning of practice will be lost.

For those who have experienced Western sports such as Rugby and Football, they seem to believe that the result of victory is everything. If a person with such an idea plays the "Uke", he won't accept the process of wasteful steps from the beginning.

It seems there is a thought that enjoys the collision of force and force.

Why did Ueshiba O-sensei strictly prohibit the game? What is the reason why you chose Aikido instead of other martial arts? I think that becoming able to answer firmly to such a question is to think about the practice method of Aikido.

I hope that many people will recognize the importance of "Kara-ashi".

Thanks for reading.

Related article: Three things we can begin immediately to become a good "Uke"

[ 空足を踏む ]








関連記事: 良い受けになるために今直ぐできる3つのこと


テーマ : 合気道
ジャンル : スポーツ

#50 Difference between Aikido and Kendo 素振りにみる合気道と剣道の違い


If you see a big guy holding Bokken (wooden sword) in chance, it may give you the illusion that it's like holding a chopstick in hand. The length and weight of the sword will be decided according to the body size of the owner, but the standard size of Bokken is obviously not suitable for XXXL size.

By the way, do you know that the standard size of Bokken you use is only half as heavy as steel made? Your arms will hurt if you keep on swinging, but actually you are just swinging a light wooden sword.

The kinetic energy is W = 1/2 x mass x square of velocity. In other words, kinetic energy is proportional to mass and proportional to square of speed.

If you hit something with a stick, you will need a lot of kinetic energy, so it's better to increase the mass and speed. However, since the sword is a weapon to cut and it is not a weapon to smash, the direction of the blade is more important than anything. If the blade is facing diagonally, nothing can be cut.

So, in Aikido assuming a steel sword, it is important to think about weight, speed and blade angle. Therefore, when you take "Suburi" exercises you need to be aware of the following points.

1. Don’t swing only with wrist
2. Change foot steps
3. Make the blade perpendicular to the cutting direction
4. Reduce the sound

Doubling the weight will double the kinetic energy, so don't swing only with your wrist. Also, when striking "Yokomen" or "Kesagiri" from the right, the right foot will be in front. When striking "Yokomen" or "Kesagiri" from the left, the left foot will be in front. You need to change foot steps.

A single-edged sword requires that the blade is perpendicular to the cutting direction. If the blade is standing straight, the swing sound will be smaller. When the sword trembles, the wind noise increases and cannot cut anything. By keeping the speed constant without swinging by force, please give priority to reducing the sound.

From the above, you can see that the foot movement of Aikido consider the weight of the steel sword, and the hand movement takes into account the angle of the blade (I call it the Pinky rule).

Meanwhile, Kendo uses a lightweight and cylindrical bamboo sword for the game. Therefore, speed is the top priority for both hand and foot movements. They often strike with the wrist only and don't change the foot steps.

So, instead of aiming at the speed of Kendo players, let's aiming for beautiful "Suburi" by considering the weight and the angle of the blade.

Thanks for reading.

Related article: Common between Kyudo and Aikido

Related article: Sticky Hand and Pinky Rule

[ 素振りにみる合気道と剣道の違い ]



運動エネルギーはW = 1/2 x 質量 x 速度の2乗となります。つまり運動エネルギーは質量に比例し、また、速さの2乗に比例します。



1. 手首で振らない
2. 足を踏み変える
3. 刃を立てる
4. 音を小さくする






関連記事: 弓道と合気道の共通点

関連記事: 吸い付く握り方と手刀の使い方

テーマ : 合気道
ジャンル : スポーツ



初心者にも分かりやすく、理論的に基礎知識を説明します。なんとなく他人の動きを真似るのではなく、普段から考える力を育てていくことを目的としています。In this blog, I explain the basics in a theoretical way that is easy to understand for beginners. The aim is to help you to develop your ability to think, not to copy the movements somehow. Aikido is not magic. I will explain things that are not so clear, such as Ki and O-Sensei's philosophy.