Tadateru (written: 忠輝, 忠英 or 忠照) is a masculine Japanese given name. Notable people with the name include:
* (1611–1652), Japanese ''daimyō''
*, president of the International Federation of Red Cross and Red Crescent Societies
* (1592–1683), Japanese ''daimyō''
* (1613–1654), Japanese ''daimyō''
* (born 1969), Japanese footballer
* (1665–1716), Japanese ''daimyō''
{{given name
Japanese masculine given names