| Wakisaka Yasuharu | |
| Native Name: | 脇坂 安治 |
| Office: | Lord of Awaji Island |
| Successor: | Wakisaka Yasumoto |
| Term Start: | 1585 |
| Term End: | 1626 |
| Birth Date: | 1554 |
| Birth Place: | Nagahama, Shiga, Japan |
| Nationality: | Japanese |
| Battles: | Tanba Campaign Siege of Miki Tenshō Iga War Battle of Shizugatake Kyūshū campaign Odawara campaign Korean campaign Battle of Sekigahara |
| Allegiance: | Azai clan Oda clan Toyotomi clan Western Army Tokugawa shogunate |
(1554 - September 26, 1626), sometimes referred to as Wakizaka Yasuharu, was a daimyō (feudal lord) of Awaji Island who fought under a number of warlords over the course of Japan's Sengoku period.
Wakisaka originally served Azai Nagamasa but after Azai's downfall in 1573, he attended the Oda clan. As a yoriki of Akechi Mitsuhide a vassal of Oda Nobunaga. he distinguished himself during the assault on Kuroi Castle in 1578 at Tamba Province.
Later, he applied directly to Hashiba Hideyoshi to become his vassal.He later gained more success during Hideyoshi's Chugoku campaigns with assaults on Kanki Castle and Siege of Miki Castle in Harima Province.
In 1581, he took part on Tenshō Iga War, he was one of several general who led Nobunaga's troops in the Siege of Hijiyama.
The following year In 1582, Akechi betrayed Oda Nobunaga and took his power and lands, but was defeated two weeks later at the Battle of Yamazaki. Wakisaka then joined the victor, Hashiba Hideyoshi, who had become a conspicuous figure as a retainer of Oda Nobunaga.
Following the Battle of Shizugatake in 1583, Wakisaka came to be known as one of the shichi-hon-yari (七本槍), or Seven Spears of Shizugatake.[1] These Seven would be among Hideyoshi's most trusted generals, especially in naval combat. Wakisaka was granted the fief of Awaji Island, worth 30,000 koku, in 1585.
He was then made commander of part of Hideyoshi's fleet, taking part in Hideyoshi's 1587 campaigns in Kyūshū, the 1590 Siege of Odawara, and the invasions of Korea, which took place from 1592 to 1598.
In 1592, Wakisaka led 1,500 soldiers and landed on the Korean peninsula.[2] He was defeated by Admiral Yi Sun-shin at the battle of Hansando and lost most of his fleet. Barely surviving the battle, he hid on a nearby uninhabited island and lived by eating seaweed until the enemy withdrew. He participated in both ground and naval actions in various places on the Korean peninsula. He was also ordered to dispatch a 1,200-man fleet during the Keichō Invasion and annihilated a Korean fleet attacking his position which was led by Won Gyun during a counterattack in July 1597. Despite his actions, he was unable to counter Admiral Yi Sun-shin, whose naval activities effectively cut off Japanese naval supply lines to the Korean Peninsula; despite this failure and the ultimate defeat of the Japanese forces during the campaigns, Wakisaka's reward for participating in this war was an increase in territory to 3,000 Koku.
In 1600, Wakisaka was going to side with Tokugawa Ieyasu, but was compelled to oppose him, siding with Ishida Mitsunari, who had raised Wakisaka's army when he stayed in Osaka. On October 21, during the decisive Battle of Sekigahara, Wakisaka switched sides along with Kobayakawa Hideaki, he defeated Ōtani Yoshitsugu's force, and contributed to the Tokugawa victory.
After the battle, Tokugawa allowed Wakisaka to continue governing his domain of Awaji. In succeeding years, he was given another fief, at Ozu, Iyo Province, worth 53,000 koku. His son, Wakisaka Yasumoto, succeeded to the house after his death.