Translation guide
The belief in a future thousand-year reign of Christ on earth, a specific form of millenarianism in Christian theology.
The doctrine of a literal thousand-year reign of Christ, as described in Revelation 20.
In Japanese, chiliasm is almost always discussed within Christian theology. If you are referring to a non-Christian millenarian belief, consider using 千年王国主義 (せんねんおうこくしゅぎ) or explaining the concept more broadly.
A less common term emphasizing the blessedness of the millennium, used in some theological contexts.
Chiliasm is a part of Christian eschatology.
This paper analyzes the history of chiliasm.