In 1584, Ryūzōji retainer Arima Harunobu split from the clan. 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 60,000 in an effort to stamp out the uprising, but was defeated by the forces of Shimazu Iehisa, with whose clan the Arima had allied themselves. Takanobu himself was killed by Kawakami Tadakata, a Shimazu retainer.
- Papinot, Jacques Edmond Joseph. (1906). Dictionnaire d’histoire et de géographie du Japon; Papinot, (2003). "Ryūzōji," Nobiliare du Japon, p. 50 [PDF 54 of 80]; retrieved 2013-5-2.
- Nussbaum, Louis-Frédéric. (2005). "Ryūzōji" in Japan Encyclopedia, p. 802.
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