Sue Harukata (陶 晴賢; 1521 – 1555) was a retainer of the Ōuchi clan in the Sengoku period in Japan. Harukata would later become a daimyo. He was the second son of Sue Okifusa, senior retainer of the Ōuchi clan. His childhood name was Goro. Before Harukata he had the name of Takafusa. He is also erroneously known as Harutaka.
Harukata was born to the Sue clan, which was related to the Ōuchi clan, and served as shugodai of Suo Province. As a boy, he served Ōuchi Yoshitaka, a childhood friend. After genpuku, he was given the name Takafusa after Ōuchi Yoshitaka. In 1539, after his father Okifusa died of illness, he became the head of the Sue clan. Being an able retainer, he became known as the Samurai General Without Peer in the Western Provinces (Saigoku-musō no Samuraidaishō).
From 1540 to 1542, he worked as the general, replacing Ōuchi Yoshitaka, in the war with the Amago clan. However, when Ōuchi's troops lost heavily in 1542, Yoshitaka's interest in war faded, and he began to incline to cultural activities. Because of this, the civil official Sagara Taketo became close to Yoshitaka, and Harukata's relationship with Yoshitaka declined.
In 1551, Harukata succeeded in the coup against Ōuchi Yoshitaka, killing Sagara Taketo and leading Yoshitaka to commit suicide. The next year Harukata secured the control of the Ōuchi clan by making the adopted son of Yoshitaka, Ōuchi Yoshinaga (who was Ōtomo Haruhide, the half-brother of Ōtomo Sōrin), the head of the clan. At this time he changed his name from Takafusa to Harutaka, as his master changed from Yoshitaka to Haruhide. Subsequently, he conducted a large military expansion, but this led to discontent among the retainers of the Ōuchi clan. In 1554 Yoshimi Masayori of Iwami Province, Yoshitaka's brother-in-law, and Mori Motonari of Aki Province rebelled against the Ōuchi clan.
In 1555 Harukata lost the Battle of Itsukushima to Mōri Motonari, and committed suicide. After the loss, the Ōuchi clan declined considerably and, two years later, Mōri Motonari annihilated the clan.
