- Died: 1610
- Titles: Musashi no kami
- Other names: Jiroshirô
- Distinction: Shimazu retainer
- Japanese: 新納忠元 (Niiro Tadamoto)
Tadamoto held Oguchi castle in Satsuma province. In the service of Shimazu Takahisa and Shimazu Yoshihisa he fought in many battles and in 1586 was responsible for bringing down the Ôtomo's Toshimitsu castle. He played a notable role in the following Battle of Hetsugigawa (January 1587) and earned fame during Toyotomi Hideyoshi's invasion of Kyushu the following year. At the Battle of Sendaigawa he led a gallant charge against the enormous Toyotomi army preparing to drive on Kagoshima. In the course of the bitter battle he fought a personal duel with Kato Kiyomasa. He was unhorsed but spared, and Hideyoshi himself expressed admiration for his courage. During Hideyoshi's invasions of Korea, Niiro served as karô and interim lord of Iino castle in Hyûga province.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005
- Ono Masako, Tomita Chinatsu, Kanna Keiko, Taguchi Megumi, "Shiryô shôkai Kishi Akimasa bunko Satsuyû kikô," Shiryôhenshûshitsu kiyô 31 (2006), 229.