Noun
seiza (uncountable)
A traditional formal way of sitting in Japan, by kneeling with the legs folded underneath the thighs and the buttocks resting on the heels, with ankles turned outward.
Iaido schools Iaido in the Czech Republic as demonstrated by Victor Cook Sensei Many iaido organisations promote sword technique from the seiza (sitting position) and refer to their art as iaido. Source: Internet
To sit in a seiza position, one kneels on the floor with legs folded under the thighs and the buttocks resting on the heels. Source: Internet