What is pop art

Pop art is an art movement that emerged in the United Kingdom and the United States during the mid-to late 1950s.[1][2] The movement presented a challenge to traditions of fine art by including imagery from popular and mass culture—including advertising, comic strips, product packaging, celebrities, and everyday consumer goods—into painting, sculpture, and printmaking. By elevating the banal, the kitschy, and the mass-produced to the status of high art, pop art blurred the boundaries between high and low culture.[3]  

https://en.wikipedia.org/wiki/Pop_art 

Superflat:

In 2000, Murakami published his "Superflat" theory in the catalogue for a group exhibition of the same name that he curated for the Museum of Contemporary Art, Los Angeles. The theory posits that there is a legacy of flat, 2-dimensional imagery from Japanese art history in manga and anime. This style differentiates itself from the western approach in its emphasis on surface and use of flat planes of color.