- Other name: Ii Naokatsu
- Distinction: Tokugawa retainer
Naotsugu succeeded his father Naomasa in 1602 and began construction of Hikone castle the following year. He refused to fight at Osaka Castle for the Tokugawa in 1614 and was therefore made to step down in favor of his younger brother Naotaka the following year. Nonetheless, he was given the fief of Anaka in Shinano province, worth 30,000 koku.
- Initial text from Samurai-Archives.com FWSeal & CEWest, 2005