Hiroshi Watanabe (渡邉 博史, Watanabe Hiroshi?) is a California-based Japanese photographer.

Born in Sapporo, Watanabe graduated from Nihon University in photography in 1975 and moved to Los Angeles, where he worked producing television commercials. He obtained an MBA from UCLA in 1993, but two years later his earlier interest in photography revived; from 2000 he has worked full time at photography.

After five self-published books, Watanabe's first to be published conventionally was I See Angels Every Day, monochrome portraits of the patients and other scenes within San Lázaro psychiatric hospital in Quito, Ecuador. This won the 2007 Photo City Sagamihara award for Japanese professional photographers.[1]

In 2005, a portfolio of his work was featured in Nueva Luz photographic journal, volume 10#3. In 2007 Watanabe won a "Critical Mass" award from Photolucida that allowed publication of his monograph Findings.

Watanabe's works are in the permanent collections of the Houston Museum of Fine Arts, George Eastman House, and Santa Barbara Museum of Art