 This stance has strong tension in the legs and is the basis of the kata Naihanchi.Sanchin-dachi (三戦立 Three Battles stance)
The stance is fixed and tensed in the same way as Naihanchin-dachi.It can be described as Uchi-hachiji-dachi with one foot moved forward until the toes of the rear foot are on the same horizontal line as the heel of the front foot.