The Kinkaku Force (金角部隊, Kinkaku Butai) was a special team of at least twenty highly skilled shinobi from Kumogakure that was active during the First Shinobi World War.
On one occasion, they tracked down Konoha's Escort Unit, surrounding them on the battlefield. The Second Hokage ultimately sacrificed himself to allow his comrades to escape.
Kinkaku (金角) means "Golden Horn". It is the name of a character from the famous story Journey to the West.
Kinkaku was alive around the same time as this team was in operation. Whether he was a member of this team is currently unknown. In the Japanese dub of the anime, he was credited with killing Tobirama.