Toshihiko Sahashi (佐橋俊彦, Sahashi Toshihiko, born November 12, 1959 in Tokyo, Japan) is a Japanese composer. He graduated from Tokyo National University of Fine Arts and Music in 1986. Sahashi has composed music for various anime series (including OVAs, films, and drama CDs), video games, films, dramas, and musicals. His works include the original soundtracks for Zipang, Ghost Sweeper Mikami, Mobile Suit Gundam SEED, Mobile Suit Gundam SEED Destiny, Gunslinger Girl, Black Blood Brothers, Ultraman Gaia, Ultraman Mebius, Seijuu Sentai Gingaman, Kamen Rider Kuuga, Kamen Rider Agito, Kamen Rider Hibiki, Kamen Rider Den-O, Full Metal Panic!, Hunter × Hunter, Simoun, Reborn! and composed all three Saint Seiya anime series. Together with the London Symphony Orchestra, two symphonic albums have been released, each arranging his compositions from Gundam SEED and Gundam SEED Destiny. For the Mobile Suit Gundam franchise's 30th anniversary, he again collaborated with the London Symphony Orchestra for another symphonic music album.

The style of his composition is richly symphonic and classical (occasionally jazz). The use of sophisticated compositional techniques, as well as complicated harmony writing such as fugue can often be heard in his work, demonstrating his solid training in the western classical music. He also uses keyboard instruments to deliver more sentimental soundtracks to good effect.