- Birth: 1539
- Death: 1604
- Titles: Harima no kami, Uenosuke
- Other names: Koide Masaharu, Kode Hideharu
- Sons: Koide Yoshimasa, Koide Hideie
- Distinction: Toyotomi retainer
Hideharu married the sister of Toyotomi Hideyoshi's wife and was awarded a 60,000-koku fief in Izumi province. He supported Ishida Mitsunari during the Sekigahara Campaign but was too infirm to go to battle himself.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005