下總國
Iizasa was born in the village of Iizasa in Shimōsa Province. When he was young, he moved to the vicinity of the famous Katori Shrine, a venerable Shinto institution northeast of Tokyo in modern-day Chiba Prefecture. The Katori Shrine enjoys a considerable martial reputation; the Shrine's Kami, Futsunushi being revered as a spirit of swordsmanship and martial arts.