Mind blowing craftmanship by tatami artist Kenzie Yamada.
The soaring crane design comes in jigsaw puzzle like pieces, and mats are in fact monocolor. Dark/light areas appear thanks to how each tatami straw mat is woven, beautifully catching the light.
You can see below the different weave directions depending on the tatami parts:
and in this video how those pieces react to light with a mesmerizing shimmer:
"They are the Azure Dragon of the East, the Vermilion Bird [Phoenix] of the South, the White Tiger of the West, and the Black Tortoise (also called "Black Warrior") of the North. Each of the creatures is most closely associated with a cardinal direction and a color, but also additionally represents other aspects, including a season of the year..."
[Wikipedia]
The artist replaced the white tiger with a white dragon.