Adachi Rokubei served as a retainer of Hibino Kiyozane, a senior commander from the Saitō clan of Mino Province.  Kiyozane held the title of Governor of Shimotsuke.  A fearsome warrior, Rokubei was known to be able to kill enemies with his bare hands and referred to as “Adachi the Slayer.”  In 1561, he fought against the Oda forces during an advance into Mino and was killed by Maeda Toshiie at the Battle of Moribe.  As recognition for the achievement, Nobunaga allowed Toshiie leave from the battle and to return to the service of his lord.