was the son of Rokkaku Yoshikata

Rokkaku Yoshikata

was a samurai head of the Rokkaku clan during Japan's Sengoku period. He was shugo and later daimyō of an area of southern Ōmi province, he served as castellan of Kannonji Castle...

; and, after 1562, he took responsibility for administration in his father's Namazue domain in Japan's Ōmi Province

Omi Province

is an old province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. It is nicknamed as .Lake Biwa, Japan's largest lake, is located at the center of the province...

.

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 daimyos independently promulgated codes of conduct to be applied within a specific han or domain. Few examples of these daimyo-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.

In 1572, Namazue was besieged and defeated by the forces of Oda Nobunaga

Oda Nobunaga

was the initiator of the unification of Japan under the shogunate in the late 16th century, which ruled Japan until the Meiji Restoration in 1868. He was also a major daimyo during the Sengoku period of Japanese history. His opus was continued, completed and finalized by his successors Toyotomi...

, led by Shibata Katsuie

Shibata Katsuie

or was a Japanese military commander during the Sengoku Period who served Oda Nobunaga.-Biography:Katsuie was born in the Shibata family, a branch of the Shiba clan . Note the differences between , , and the .Katsuie was the retainer of Oda Nobukatsu...

.

The series of defeat in the late 1560s and early 1570s signaled the end of the Rokkaku clan

Rokkaku clan

The was a Japanese samurai clan which wielded considerable power in the Muromachi period under the Ashikaga shogunate.-Rise and Fall:Founded by Sasaki Yasutsuna of Ōmi province in the 13th century, the name Rokkaku was taken from their residence within Kyoto; however, many members of this family...

's independence. The Rokkaku became vassals of Oda Nobunaga.

Yoshisuke later served one of Nobunaga's former generals, Tokugawa Ieyasu

Tokugawa Ieyasu

 was the founder and first shogun of the Tokugawa shogunate of Japan , which ruled from the Battle of Sekigahara  in 1600 until the Meiji Restoration in 1868. Ieyasu seized power in 1600, received appointment as shogun in 1603, abdicated from office in 1605, but...

. During the Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

, his descendants were ranked amongst the kōke

Koke

A was a noble ranking below a daimyo in Japan during the Edo period. Their lands were assessed at less than ten thousand koku, making them ineligible for the rank of daimyo.Unlike hatamoto, whose duties were military, the kōke had certain privileged missions...

.