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.
Paul Horiuchi was born Chikamasa Horiuchi on April 12, 1906, in the village of Oishi, on the shores of Lake Kawaguchi, near Mount Fuji, in Japan. He was the second son of Daisaku Horiuchi, a cabinetmaker and Kabuki singer, and his wife Yasu. His father departed for the United States when Chikamasa was a few days old, followed by his mother four years later. Chikamasa and his older brother Toshimasa (later known as "Tom") were raised by their grandfather, Tokutaro Horiuchi, an antiques collector.
Horiuchi was a runner in his early teens, his best time for the 100-meter dash reputedly tying the Olympic record. He was nominated for Japan's Olympic team, but had to stop running due to an enlarged heart.
Under Iketani, a locally prominent artist, Horiuchi studied traditional sumi-e (or ink wash) technique, and won second prize in a nationwide landscape painting competition.