The 1st Division (第1師団, Dai-Ichi Shidan) is one of nine active divisions of the Japan Ground Self-Defense Force.

The division is subordinated to the Eastern Army and is headquartered at Camp Nerima in Nerima, Tokyo.

Its responsibility is the defense of Tokyo and the Chiba, Ibaraki, Kanagawa, Saitama, Shizuoka and Yamanashi prefectures.

The division was raised on 18 January 1962 but dates back to the 1st District Corps (Tokyo) of the then National Police Reserve formed in 1950 and reformed in 1962 as an Infantry Division.