- Born: 1553
- Died: 1602
- Other names: 新納旅庵 (Niiro Ryoan)
- Distinction: Shimazu retainer
- Japanese: 新納長住 (Niiro Nagazumi)
Niiro Nagazumi was a son of Niiro Yasuhisa. He entered the priesthood and adopted the name Ryoan, traveling as far as Kyoto at the age of 16 in his pursuit of learning. On his return he became the head priest of a yashiro (Shinto temple). In 1587 he returned to secular life at the order of Shimazu Yoshihisa and served Yoshihiro in Toyotomi Hideyoshi's invasions of Korea and at the Battle of Sekigahara.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005