Tadanari

Tadanari (written: 忠成) is a masculine Japanese given name. Notable people with the name include:


 * Aoyama Tadanari (青山 忠成) (1551–1613), Japanese daimyō
 * Tadanari Lee (李 忠成) (born 1985), Japanese footballer
 * Nishio Tadanari (西尾 忠成) (1653–1713), Japanese daimyō
 * Tadanari Okamoto (岡本 忠成) (1932–1990), Japanese animator