What is the name of the cloth on the head of a Japanese nun?

A light blue hat refers to a light blue hat. He also made light green hats and hats. Commonly known as China hat hat. Also known as wrapping the head. The head wrapping system originated in India; When the Buddha died, due to the cold weather in northern India, the Buddha allowed monks to wrap their heads with hats made of enamel. According to legend, when Yang Di was King of Jin, he asked Tiantai master Zhi Zhi to give a ring to the Bodhisattva. Because of the cold weather at that time, King Jin untied his pale green sleeves and wrapped them around Zhi Zhi's head, which is the origin of China's pale green hat.