Yishai is a contemporary painter and occasional art critic, born in Mexico City, based in Los Angeles and soon migrating to moshav Tal Shachar. His artwork has been shown worldwide in prestigious international exhibitions. A recent series, "Prussian Blue", deals with the aesthetic challenges of Holocaust remembrance through art, and has been shown, among other institutions, at the Mishkan Museum of Art in Ein Harod in 2021. His writing has been published in Artforum, Art Issues, Los Angeles Times, Cleveland Review of Books, and more.