The phrase Ten Lost Tribes of Israel refers to the ancient Tribes of Israel that disappeared from the Biblical account after the Kingdom of Israel was destroyed, enslaved and exiled by ancient Assyria.
Many groups of Jews have doctrines concerning the continued hidden existence or future public return of these tribes. This is a subject that is partially based upon authenticated and documented historical fact, partially upon written religious tradition and partially upon speculation.
There have been some bizarre claims about who may be descended from the lost tribes. Some claims include the Irish, Native Americans, British, and the Japanese. The Kaifeng Jews (pictured above) in China claim to be descended from one of the lost tribes.