Note 5 — ACT I.
Jukichi Inouye translation
Seiwa Genji: the name Minamoto, or Genji, was first bestowed upon Prince Tsunemoto, a grandson of Emperor Seiwa (856-877), when he suppressed Masakado’s rebellion in 940. The Seiwa Genji were the direct descendants of the prince, while the collateral lines were known as the Yamato, Settsu, and Kai Genji.