The theme for 2013 was mainly ken and mutô dori. Sensei ended the year by speaking a lot about « zero no Chikara » or « no strength » (picture).
But did you know that 力 chikara and 刀 sword are nearly written the same? -the vertical line protruding on top of the »ken ». Therefore strength and sword are linked; and if you are not using any strength then you achieve 無刀取り mutô dori.
By using no power you have unlimited power as 無刀取り mutô dori is having the courage to do what you have to do, whatever the outcome might be.