Sawa Kouchi (河内沙和, Kouchi Sawa, born 6 November 1983), known mononymously as SAWA, is a Japanese singer-songwriter, music producer, and DJ. In 2009, she signed onto Sony Music Entertainment Japan and joined its subsidiary, Epic Records Japan. In 2012, she joined Bellwood Records for the release of her sixth mini-album, Soprano Rain (ソプラノレイン).

She has composed commercial songs and jingles for numerous companies, including LINE for their "LINE Pay" and "LINE Shopping" services, Alinamin Pharmaceuticals, and SMBC Consumer Finance for their consumer loan service Promise. She has also acted as music producer for a number of artists, including Especia, Nozomi Sasaki, and Koto.