Pixel art is a style that can be produced across many mediums, and Ukiyo-e is a medium that can accomodate a variety of styles. So a replication of Ukiyo-e art

Pixel art is a style that can be produced across many mediums, and Ukiyo-e is a medium that can accomodate a variety of styles. So a replication of Ukiyo-e art on a screen isn't actually Ukiyo-e anymore than a print of a Van Gogh painting is actually a Van Gogh painting.