We in the West have crop circle.
They in Japan have rice paddy art.
It’s simple in principle, although obviously it needs a great deal of planning: different strains of rice, which produce different colored plants (mostly greens and browns), are planted in a design that produces a picture that remains throughout the growing season.
At the link, Pink Tentacle has some examples plus some on the ground close ups so you can see how the art is produced
Tags: Japan, rice paddy art