This plus the posture of the hands in Yoi show the Chinese origins to the kata. Jitte Jitte means 'Ten Hands'. It is a very powerful kata designed to give the strength of being able to fight ten opponents. Hangetsu Hangetsu means 'Half moon' referring to the principle stance of the kata. The original name was Seisan .
Emphasis is on correct use of breathing and focus.
This is the Shotokan version of a slow powerful kata such as Sanchin . Gankaku Gankaku literally means 'Crane on a rock' and emulates the bird stance whilst awaiting its prey. The kata uses the Tsuruashi dachi 'crane leg stance' or Sagiashi dachi as referred in other systems. The original kata was known as Chinto. The shorter version of Bassai Dai utilising a similar embusen or performance line.