Minamoto no Masazane

Minamoto no Masazane (1059–1127) was a late-Heian noble of the Murakami Genji, eldest son of right minister Minamoto no Akifusa and maternal uncle of Emperor Horikawa. He became a councillor at nineteen in 1077, inner minister in 1100 and right minister in 1115.

In 1122 he was made grand minister of state, the first Minamoto to hold the highest court office. Illness led him to take Buddhist vows in 1124, and he died in 1127; his descendants founded the Koga family.