The translation is most likely correct and references a Japanese custom.
Prostration is the gesture of placing one's body in a reverentially or submissively prone position. Typically prostration is distinguished from the lesser acts of bowing or kneeling by involving a part of the body above the knee, especially the hands, touching the ground.
In Japan, a common form of prostration is called dogeza, which was used as a sign of deep respect and submission for the elders of a family, guests, samurai, daimyōs and the Emperor. In modern times, it is generally used only in extreme circumstances, such as when apologizing for very serious transgressions or begging for an incredible favor.