The uniqueness of Iizasa's Tenshin Shōden Katori Shintō-ryū is still evident today, in the particular aspects of weapon-wielding, posture, stance, and foot and body movements which make allowance for the fact that the bushi (classical samurai warriors) of his era would be wearing 'yoroi' (armour) weighing around 35 kg, and fighting on uneven terrain. These factors tend to keep the wearer's feet firmly and flat on the ground, and slow down mobility considerably. The distinctive techniques and tactics of this ryū also acknowledge the design of classical Japanese armour, which, although protecting the wearer well, had many 'suki' (openings). The main attacking areas included: under the wrists; inside and behind the legs; the hip area; the space between the 'kabuto' (helmet) and 'dō' (chest protector) where the neck arteries and veins could be easily severed. The signature, 'omote' (basic-battlefield) sword technique of the ryū, 'makiuchi-jodan', was created by Iizasa because the bushi could not raise the sword above the head due to the obstruction of the kabuto, and secondly, notwithstanding that restriction, a very powerful 'chopping' blow from above was still needed to be generated in order to produce the maximum destructive force for when circumstances dictated attacking areas of the 'yoroi' other than the 'suki'.