A systematic nonverbal communication expressing the depth of respect or apology through body inclination angles. From a 15-degree slight bow to a 90-degree deep bow, angle variations progressively express respect levels, apology sincerity, and gratitude depth. One must discriminate appropriate angles based on the recipient's social status, situation formality, and one's role, representing sophisticated etiquette. Physiologically, changes in head position affect blood flow, demonstrating how physical conduct influences psychological states, embodying the mind-body integration central to Japanese culture.
respect expressionnonverbal communicationbodily etiquette