Rokkaku Yoshisuke (六角義介)(died 1612) or Yoshiharu, was the son of Rokkaku Yoshikata; and, after 1562, he took responsibility for administration in his father's Namazue domain in Japan's Ōmi Province.[1]
During the Sengoku period, Japan's social and legal culture evolved in ways unrelated to the well-known history of serial battles and armed skirmishes. A number of forward-looking daimyōs independently promulgated codes of conduct to be applied within a specific han or domain. Few examples of these daimyō-made law codes have survived, but the legal framework contrived by the Rokkaku clan remains amongst the small number of documents which can still be studied In 1567, the Rokkaku-shi shikimoku is promulgated.[2]
In 1570, He fought in the failed Siege of Chōkō-ji. Then in 1572, Namazue was besieged and defeated by the forces of Oda Nobunaga, led by Shibata Katsuie.[3]
The series of defeat in the late 1560s and early 1570s signaled the end of the Rokkaku clan's independence.[4] The Rokkaku became vassals of Oda Nobunaga.
Yoshisuke later served one of Nobunaga's former generals, Tokugawa Ieyasu. During the Edo period, his descendants were ranked amongst the kōke.[1]