| 1st Division | |
|---|---|
| 第1師団 | |
&sq=Google&lang=en&file=File:JGSDF_1st_Division.svg) 1st Division Distinctive Unit Insignia | |
| Active | 18 January 1962 – present |
| Country |  Japan |
| Branch |  Japan Ground Self-Defense Force |
| Type | Infantry division |
| Size | 6,500 soldiers (As of 2023) |
| Part of | &sq=Google&lang=en&file=File:JGSDF_Eastern_Army.svg){kind=small} Eastern Army |
| Garrison/HQ | Camp Nerima, Nerima, Tokyo |
| Nickname(s) | Leader Division (頭号師団) |
| Commanders | |
| Current commander | Lt. Gen. Yasuyuki Kodama |
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.