Al-Ustaj Umbra Amiril Kato (18 May 1946 – 14 April 2015) was a Filipino terrorist. He was the founder of the Bangsamoro Islamic Freedom Fighters (BIFF) a group which seceded from Moro Islamic Liberation Front (MILF).
He joined the MILF after 1985, after he graduated from Imam Muhammad bin Saud Islamic University in Riyadh, Saudi Arabia. Umbra Kato was the Philippine's most wanted man though due to his still official membership in the MILF.
Kato died of a heart attack at the age of 68.