Lifespan: Unknown to 8/15 of Genki 1 (1570)
Other Names: Nobumasa, Dota Jinsuke (common), Dōju (monk’s name)
Title: Governor of Dewa (honorary)
Lord: Oda Nobuyasu → Oda Nobunaga
Father: Dota Masahisa
Adoptive Father: Ikoma Toyomasa
Wife: Daughter of the Sone clan
Children: Chikamasa, Chikakiyo, Katsusuke (Ichizaemon), Surinosuke, Jiemon, Genhachirō
Ikoma Chikashige served as a bushō during the Sengoku period. He was a retainer of the Oda clan.
Chikashige was born as the son of Dota Masahisa. Under another theory, he is the same individual as Masahisa. Chikashige was adopted by Ikoma Toyomasa. Initially, he served Oda Nobuyasu. Later, he served Nobuyasu’s nephew, Oda Nobunaga.