The map of China during the period when Japan occupied the largest area during its invasion of China is as follows.

On September 18, 1931, the September 18th Incident broke out. The Japanese Kwantung Army troops massively invaded Chinese territory, starting a 14-year war of aggression against China.

After the September 18th Incident, the Japanese army invaded and occupied the three northeastern provinces of my country and established the Puppet Manchukuo, which governed the three northeastern provinces, eastern Inner Mongolia, and Hebei Province.

On May 29, 1935, He Yingqin, acting chairman of the North China Army Branch, began secret negotiations with Japanese representatives. On July 6, he formally replied to Umezu Yoshijiro, stating that he was "committed to all matters raised" and accepted Japan's request. The Kuomintang government gave up its sovereignty over the five provinces of North China (Hebei, Shanxi, Shandong, Chahar, and Suiyuan).

On July 7, 1937, the July 7th Incident broke out, and the Japanese army did not invade Shaanxi. Waiting for the northwest region, they only carried out heavy bombing of Chongqing.

From the "July 7th" Incident to the Battle of Henan, Hunan and Guangxi between the Nationalist Army and the Party Army in December 1944, the Japanese army invaded all the way south, including Hebei, Shandong, Shanxi, and Henan. , Anhui, Jiangsu, Zhejiang, Jiangxi, Shanghai, Hunan, Hubei, Guangdong, Fujian, Guizhou, Guangxi and other provinces were invaded by the Japanese army. The Japanese army did not have enough troops to occupy them all. Under normal circumstances, they only occupied large cities. and transportation lines.

As of August 15, 1945, the Japanese ground troops had occupied 21 provinces, 5 municipalities, the Weihaiwei Administrative Region, and the Eastern Province Special Region, covering an area of ??more than 6 million square kilometers.

Extended information:

The provinces that fell during the war of aggression against China:

During the Anti-Japanese War, there were a total of nine provinces that fell in China. They are: Taiwan Province, Liaoning Province, Jilin Province, Heilongjiang Province, Jehol Province, Chahar Province, Hebei Province, Shandong Province and Jiangsu Province.

Partially occupied provinces during the war of aggression against China:

During the Anti-Japanese War, 13 provinces in China were partially occupied, in descending order of occupied area: Henan Province, Shanxi Province, Anzheng Province, Zhejiang Province, Suiyuan Province, and Guangdong Province. , Hubei Province, Guangxi Province, Hunan Province, Jiangxi Province, Fujian Province, Guizhou Province and Yunnan Province. In addition, during the Anti-Japanese War, China had 6 municipalities directly under the Central Government, and 5 of them were also included in the occupation.

1. Henan Province (98.5% fell)

During the Anti-Japanese War, 109 counties fell successively, and only two counties, Shenqiu County and Xincai County, fell.

2. Shanxi Province (98.2% occupied)

During the Anti-Japanese War, 103 counties were occupied, and only two counties, Yonghe County and Pingshun County, were spared from the Japanese invaders. Occupied.

3. Anzheng Province (81.9% occupied)

During the Anti-Japanese War, 48 counties were occupied, and only 14 counties were not occupied. They are: Lujiang County, Jing County, Shidai County, Jingde County, Ningguo County, Qimen County, Yuexi County, Linquan County, Yingshang County, Yi County, Huoqiu County, Xiuning County, She County and Jixi Counties.

4. Zhejiang Province (78.6% fell)

During the Anti-Japanese War, 64 counties and cities were occupied, and only 12 counties were not occupied. They are: Yuqian County, Changhua County, Xianju County, Pan'an County, Kaihua County, Chun'an County, Sui'an County, Taishun County, Longquan County, Qingyuan County, Yunhe County and Jingning County.

5. Suiyuan Province (71% occupied)

During the Anti-Japanese War, 14 counties and cities and 2 league banners fell successively, except for Yike Zhaomeng Banner and Dongsheng County and Liang County in the Hetao area. Cheng County and Xinghe County were not occupied.

6. Guangdong Province (70.3% fell)

During the Anti-Japanese War, 70 counties and cities fell successively, and only 28 counties did not fall.

The 28 counties that have not fallen are: Kaijian County, Enping County, Chixi County, Fogang County, Guangning County, Renhua County, Lian County, Yangshan County, Lianshan County, Zijin County, Heyuan County, Heping County, Lianping County, Raoping County, Fengshun County, Meixian County, Wuhua County, Xingning County, Pingyuan County, Jiaoling County, Maoming County, Dabu County, Xinyi County, Hua County, Wuchuan County, Xuwen County, Yangchun County and Hepu County.

7. Hubei Province (69.3% fell)

During the Anti-Japanese War, 53 counties and cities fell successively, and only 18 counties did not fall. The 18 counties that have not fallen are: Jun County, Yun County, Fang County, Zhuxi County, Zhushan County, Baokang County, Yunxi County, Gucheng County, Badong County, Xingshan County, Zigui County, and Enshi County, Yien County, Jianshi County, Lichuan County, Laifeng County, Xianfeng County and Hefeng County.

8． Guangxi Province (68.6% fell)

During the Anti-Japanese War, 67 counties fell successively, and only 32 counties did not fall. The 32 counties that have not fallen are: He County, Bobai County, Yulin County, Xingye County, Duan County, Longan County, Baise County, Tiandong County, Donglan County, Lingyun County, Tianyang County, and Fengshan County , Pingzhi County, Jingxi County, Zhenbian County, Tianxi County, Leye County, Wangang County, Tian'e County, Beiliu County, Xilin County, Xilong County, Xiangdu County, Zhenjie County, Longming County , Nama County, Longshan County, Jingde County, Tianbao County, Yangli County, Wancheng County and Leiping County.

9． Hunan Province (68.4% fell)

During the Anti-Japanese War, 50 counties and cities fell successively, and only 26 counties did not fall. The 26 counties that have not fallen are: Ling County, Linfeng County, Rucheng County, Guidong County, Zhijiang County, Fenghuang County, Yuanling County, Huxi County, Chenxi County, Xupu County, and Qianyang County , Mayang County, Yongshun County, Baojing County, Longshan County, Sangzhi County, Guzhang County, Jing County, Suining County, Contract County, Tongtong County, Gancheng County, Yongsui County, Huang County, Dayong County and Huaihua County.

10． Jiangxi Province (63.5% fell)

During the Anti-Japanese War, 56 counties and cities fell successively, and only 27 counties did not fall. The 27 counties that have not fallen are: Fengcheng County, Poyang County, Ninggang County, Fenyi County, Nanfeng County, Tonggu County, Guangchang County, Lichuan County, Yudu County, Xingguo County, Huichang County, Anyuan County County, Xunwu County, Le'an County, Yichun County, Jinxi County, Anfu County, Qianshan County, Shangyou County, Chongyi County, Ningdu County, Ruijin County, Shicheng County, Leping County, Fuliang County, Dexing County and Wannian County.

11． Fujian Province (18.5% fell)

During the Anti-Japanese War, 15 counties and cities fell successively. These 15 counties and cities are: Kinmen County, Xiamen City, Zhao'an County, Dongshan County, Fuqing County, Changle County, Lianjiang County, Minhou County, Haicheng County, Yong'an County, Xiapu County, Ningde County, Fu'an County, Zhangpu County and Yunxiao County.

12． Guizhou Province (4.8% fell)

During the Anti-Japanese War, 4 counties fell successively. These four counties are: Sandu County, Dushan County, Danzhai County and Libo County.

13． Yunnan Province (3.3% fell)

During the Anti-Japanese War, 3 counties fell successively. These three counties are: Longling County, Baoshan County and Tengchong County.

Municipality (5 of 6 municipalities fell)

During the Anti-Japanese War, China successively established 6 municipalities directly under the Central Government, namely: Peking City, Tianjin City, Shanghai City, Nanjing City, Qingdao City and Chongqing City. Five of them fell successively, namely:

Beiping City: fell on July 29, 1937.

Tianjin City: fell on July 30, 1937.

Shanghai City: fell on November 12, 1937.

Nanjing City: fell on December 13, 1937.

Qingdao City: fell on January 10, 1938.

Provinces that have not fallen:

In half a century of war against Japan, only 8 provinces and 1 municipality (Chongqing) in China did not fall into the hands of the Japanese invaders. These eight provinces are: Xikang Province, Ningxia Province, Qinghai Province, Xinjiang Province, Sichuan Province, Shaanxi Province, Gansu Province and Tibet Autonomous Region.

Tibet Autonomous Region, Xikang Province, Ningxia Province, Qinghai Province, and Xinjiang Province.

During the Anti-Japanese War, it was not bombed or occupied by the Japanese army.

None of the counties in Sichuan Province were invaded by the Japanese army, but some cities were bombed by enemy planes.

Some counties and towns under the jurisdiction of Shaanxi Province were invaded and bombed by the Japanese army many times. But generally speaking, none of the counties were occupied by the Japanese army.

None of the counties in Gansu Province were invaded by the Japanese army, but some cities were bombed by enemy planes.

The municipality directly under the Central Government (Chongqing) was bombed indiscriminately by the Japanese army.

Reference materials:

Iron Blood Network-Japanese invasion of China and occupation of Chinese territory

Baidu Encyclopedia-Japanese War of Aggression against China

Baidu Encyclopedia- Crimes of the Japanese Invading China