Ryūzōji Takanobu (龍造寺 隆信, March 24, 1529 – May 4, 1584) was a Japanese daimyō in Hizen Province during the Sengoku period.^[1] Takanobu was the head of the Ryūzōji clan.^[2]

Takanobu was the grandson of Ryūzōji Iekane (1454-1546). His father was Ryûzôji Chikaie and his mother was Keigin-ni.^[3]

Ryūzōji Takanobu is known for expanding his clan's holdings. He took land from the Shōni clan. In 1578, Takanobu conquered almost all of Hizen Province.^[2] The following year, the Ryūzōji clan advanced to Chikuzen and Buzen.^[2] In 1580, Takanobu retired in Suko castle but he retained the real power until his death.^[4]

In 1584, Ryūzōji retainer Arima Harunobu split from the clan.^[2] Seizing upon this opportunity, several of the local small clans in the Shimabara Peninsula also rose up in arms. Takanobu personally led an army of around 30,000 against the Shimazu-Arima, but was killed in the Battle of Okitanawate by Shimazu Iehisa's army.^[2][3]

Ryūzōji Masaie (1556–1607) was the son of Takanobu.^[5] Following Takanobu's death, Ryūzōji domain was taken over by Takanobu's chief retainer Nabeshima Naoshige.^[6]