The 4th Division (第4師団) is one of nine active divisions of the Japan Ground Self-Defense Force.

The division is subordinated to the Western Army and is headquartered in Kasuga, Fukuoka.

Its responsibility is the defense of the Fukuoka, Nagasaki, Ōita and Saga prefectures.

[1] The division was established on 15 August 1962. note 1: Infantry regiments have only battalion strength.