Hitofude-ryu is a traditional way of painting in Japan. It is the practice of painting the torso of a dragon in a single stroke.
Hitofude-ryu originated in the Edo period of Japan (1603-1867). The painting is seen as good luck for money and romantic relationships. The artists then adds personalized “bonji” characters of a particular god. This changes depending on the customers profession. Hitofude-ryu requires an extreme amount of focus and the artist typically only completes 3 to 5 images per day.
Read more in :”Watch This Artist Paint a Dragon’s Body With One Soothing Stroke”
https://www.nationalgeographic.com/culture-exploration/2018/07/japanese-artist-single-stroke-painting-dragon/