Yomigami
In the age of deities, after the banishment of Susano-o from the Celestial Plains to the land of Nippon, but before Nagi's defeat of Orochi, the great sun goddess Amaterasu walked the lands that she ruled in the form of a great white wolf, giving light and life to the mortal and heavenly realms.
As she wondered, she felt an impulse well up within her soul. Driven by this nameless urge, she traveled the mortal world until came across an unadorned, pure white silk wall scroll. As she gazed upon it, the power within her reached out to the scroll. Realizing that this was what she had been searching for, Amaterasu brought the scroll with her to the Celestial Plains.
She laid the scroll out on the ground and meditated on her powers. As if in a trance, she lifted her tail, the tip wet and black with her holy ink, and put it to the silk. As she drew, her power effused her entire body, the ink, and the scroll. Over time, the image of a fierce dragon formed on the scroll. Even when the dragon was finished, the goddess continued on, drawing in the landscape in the background of the scroll.
Once that was done, Amaterasu knew that her task was not yet finished. With great care, she tore the silk of the scroll into three pieces. Then, with the severed edges of the pieces lying flush together, she called upon her power of Rejuvenation and Restoration. With the brush of her tail, the goddess drew ink over the tears as if laying stiches. Wherever the ink had touched, the scroll became whole.
The silk scroll in one piece once more, Amaterasu called up her powers once more and poured life into the scroll like water. The ink dragon moved, stretched, and lifted itself off of the scroll. It rose in to the air, scales white as the fresh fallen snow, marked with the scarlet whorls and lines of divinity. In each three-toed claw it gripped a yellow orb. Its body had separated almost entirely from the scroll, which floated in the air behind it, save for a section of its tail, which remained a drawing on the silk of the scroll at the points where the scroll had been torn and mended.
The dragon lowered itself before Amaterasu and spoke in a deep, growling, male voice. "Hail, Mother," he rumbled. "You have called me into being, and so I am."
Amaterasu's heart soared as she realized the source of her restlessness, for it had been time since she had last birthed new gods. She blessed her new son, licking his ivory brow, and then gifted him with the power he had been born of. She named him Yomigami, Brush God of Rejuvenation, from the word yomigaeru, to be resurrected.
And so did Amaterasu give birth to the first and oldest of the Brush Gods, Yomigami, God of Rejuvenation.