He is also well known as Kamiizumi Isenokami (上泉 伊勢守) which was his name as a samurai official (武家官位, Bukekani) for a period of time.
Kamiizumi is also famous under the alias Kamiizumi Isenokami (上泉 伊勢守), which he held as a samurai officer (武家官位, Bukekani) for a limited time in his career.