Gunma is the northwestern-most prefecture of the Kanto, and is mostly mountainous in the north, with more of the population concentrated in the southern half facing Saitama Prefecture.
On January 23, 2006, the municipalities of Gunma, Kurabuchi and Misato from Gunma District and the town of Shin from Tano District merged into the expanded city of Takasaki.
The prefectural symbol consists of the first kanji of the word 'Gunma' surrounded by three stylized mountains symbolizing the three important mountains of Gunma Prefecture: Mount Haruna, Mt.