| 13th Division | |
|---|---|
&sq=&lang=&file=File:Former_official_residence_of_the_13th_Division_of_Japanese_Army.jpg) former IJA 13th Division HQ in Joetsu, Niigata | |
| Active | 1 April 1905 – 1 May 1925 10 September 1937 – 1945 |
| Country | Empire of Japan |
| Branch | Imperial Japanese Army |
| Type | Infantry |
| Size | 25,000 men |
| Garrison/HQ | Takada, Japan |
| Nickname(s) | Mirror Division |
| Engagements | Russo-Japanese War Second Sino-Japanese War World War II |
The 13th Division (第13師団, Dai Jūsan Shidan) was an infantry division in the Imperial Japanese Army. Its tsūshōgō code name was the Mirror Division (鏡兵団, Kagami-heidan), and its military symbol was 13D. The 13th Division was one of four new infantry divisions raised by the Imperial Japanese Army (IJA) in the closing stages of the Russo-Japanese War 1 April 1905, after it turned out what the entire IJA was committed to combat in Manchuria, leaving not a single division to guard the Japanese home islands from attack.