Synchronized hand and hammer motion in the video will leave you in utter bewilderment.
They are not Sumo wrestlers or Ninjas or some Judo specialist. They are skilled Mochi makers. Don't you turn off the video after the first 2 minutes, continue watching for the slow-motioned version to witness the skilled hands pounding the Mochi while a hammer is almost about to smash it. Hold on both pairs of hands are high on precision and accuracy!
Caution: Children should not try this without adult supervision