Genchū Yoteki (源註余摘) is a commentary on The Tale of Genji by the Edo period kokugaku scholar Ishikawa Masamochi. It criticizes earlier Edo commentaries by Keichū and others, based on Masamochi's original linguistic scholarship. Its date is unknown, but it took its current form at some point between 1799 and 1830. It is in 54 books (matching the 54 books of Genji), and has been published in various numbers of volumes, most commonly 20.