Also known as: Matsunaga Danjou Hisahide (松永弾正久秀), Matsunaga Soutei (松永霜台)

Initally a vassal of the Miyoshi Clan who served Miyoshi Nagayoshi as his private secretary, Hisahide was both a warrior and a tea master who would be regarded by history as a schemer and something of a villain.

Miyoshi Nagayoshi gave his daughter to Hisahide in marriage, but Hisahide turned against his master. He was rumored to have poisoned Nagayoshi's son and heir, Miyoshi Yoshioki, and Nagayoshi's three brothers died under mysterious circumstances between 1561-1564. In 1564 at Nagayoshi's death, all that stood between Hisahide and the Miyoshi domain was the young Miyoshi Yoshitsugu, whom Nagayoshi had seleted as heir, and his guardians the "Miyoshi Triumvirate", Miyoshi Nagayuki, Miyoshi Masayasu, and Iwanari Tomomichi.

Hisahide briefly joined forces with the Triumvirate against the Shogun, Ashikaga Yoshiteru, who was forced to commit suicide. Thereafter he fought against the Miyoshi Clan and later submitted to Oda Nobunaga and served him for a few years after 1568.

In 1573, however, he was already conspiring against Nobunaga with Miyoshi Yoshitsugu—then turned back to Nobunaga and destroyed the remaining Miyoshi Clan. In 1577, he rebelled against Nobunaga again and in the end committed suicide at Shigisan Castle when besieged by Oda's army (though first smashing a priceless tea kettle, the "Hiragumo", which Nobunaga had coveted).