PAUL HORIUCHI (1906–1999) was an American painter and collagist. He was born in Oishi, Japan, and studied art from an early age. After immigrating to the United States in his early teens, he spent many years as a railroad worker in the Western U.S. In 1946, he moved to Seattle, Washington, where he eventually switched his focus from painting to collage and came to be associated with the "Northwest School" of artists. In his mid-forties, he was finally able to devote himself to art full-time, his unusual collage style becoming very popular in the 1950s and 60s. He continued creating art at his studio in Seattle until succumbing to Alzheimer's-related health problems in 1999.
Today, he is best known to the public for his glass mosaic backdrop to the Seattle Center's Mural Amphitheater. His paintings and collage remain highly prized by collectors, are on permanent display at several museums, and continue to be the subject of special exhibitions at various museums and galleries.