Kinkaku (金角) means "Golden Horn." It is apparently the name of a character from the famous story "Journey to the West".
The Kinkaku Force (金角部隊, Kinkaku Butai) were a special team of at least twenty skilled shinobi from Kumogakure during the time of the First Great Shinobi World War. They tracked down Team Tobirama, Danzō Shimura, Torifu Akimichi, and Kagami Uchiha, trapping them on the battlefield. The Second Hokage sacrificed himself to allow his subordinates to escape.
There are Three different Branches of the Kinkaku Force.
The Master Kinkaku
The Wolf Kinkaku
The Student Kinkaku (Ninjas/Shinobi Training to be part of the Kinkaku Force)
Kinkaku Force Symbols:
The Master Kinkaku Symbol-
The Wolf Kinkaku Symbol-
The Student Kinkaku Symbol-
Tattoo Required-
Kinkaku Force Members:
Unknown