- Born: 1580
- Died: 1608
- Titles: Satsuma no kami
- Other names: 松平忠吉 (Matsudaira Tadayoshi)
- Japanese: 徳川忠吉 (Tokugawa Tadayoshi)
Tadayoshi’s mother was Saigo no Tsubone. He was adopted by Matsudaira Ietada and was at first known as Matsudaira Tadayasu. At the Battle of Sekigahara, Tadayoshi was attended by Ii Naomasa and was therefore at the forefront of the fighting. He was afterwards given a 570,000 koku fief in Owari province but died in 1608.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005