Watanabe no Tsuna

Watanabe no Tsuna (953–1025) was a mid-Heian warrior, descended from Emperor Saga through the Saga Genji. Born after his father Minamoto no Atsuru's death, he was adopted by Minamoto no Atsushi and settled at Watanabe in Settsu, taking that place as his surname and becoming ancestor of the Watanabe clan.

He served Minamoto no Yorimitsu as foremost of his Four Heavenly Kings, and in 1020 received the governorship of Tango. Tales credit him with helping slay Shuten-dōji and severing Ibaraki-dōji's arm at Kyoto's Modoribashi bridge with the blade Higekiri.