My understanding of the Japanese forces of the northern pincer (minus some commanders ) are these:
-2nd Army - Prince Naruhiko [Joined Expeditionary Force July 4th] [1][2]
--3rd Division - Gen. ? [Origially with Exped. Force July 15, with 2nd Army Aug.22nd]
---5th Infantry Brigade
---- 6th Infantry Regiment
---- 68th Infantry Regiment
---29th Infantry Brigade
---- 18th Infantry Regiment
---- 34th Infantry Regiment
--- 3rd Field Artillery Regiment
--- 3rd Cavalry Regiment
--- 3rd Engineer Regiment
--- 3rd Transport Regiment
--10th Division – Gen Rinsuke Isoya?
---8th Infantry Brigade
----39th Infantry Regiment
----40th Infantry Regiment
---33rd Infantry Brigade
----10th Infantry Regiment
----63rd Infantry Regiment
---10th Field Artillery Regiment
--10th Cavalry Regiment
--10th Engineer Regiment
--10th Transport Regiment
--13th Division - Gen. ? [Origially with Exped. Force, with 2nd Army July 4th]
--- 26th Infantry Brigade
---- 58th Infantry Regiment
---- 116th Infantry Regiment
--- 103rd Infantry Brigade
---- 65th Infantry Regiment
---- 104th Infantry Regiment
--- 19th Mountain Artilley Regiment
--- 17th Cavalry Regiment
--- 13th Engineer Regiment
--- 13th Transport Regiment
--16th Division – Gen. Kesao Nakashima [with 2nd Army July 4th]
--- 19th Infantry Brigade
---- 9th Infantry Regiment
---- 20th Infantry Regiment
--- 30th Infantry Brigade
---- 33rd Infantry Regiment
---- 38th Infantry Regiment
--- 22nd Field Artillery Regiment
--- 20th Cavalry Regiment
--- 16th Engineer Regiment
--- 16th Transport Regiment
I suspect there were probably other support units too but I cant find any such listing.
Opposing them were troops of the Chinese 5th War Area:
5th War Area - Li Tsung-jen , Pai Chung-hsi (acting) [1]
- 3rd Army Corps - Sun Lien-chung
-- 2nd Army Group - Sun Lien-chung
--- 30th Corps - Tien Chen-nan
----30th Division - Chang Ching-lieh
----31st Division - Chih Feng-cheng
--- 42nd Corps - Feng An-pang
----27th Division - Huang Chiao-sung
----44th Sep. Brigade - Wu Peng-chu
--26th Corps - Hsiao Chi-chu
---32nd Division - Wang Hsiu-shen
---44th Division - Chen Yung
--55th Corps - Tsao Fu-lin
---29th Division - Tsao Fu-lin
---74th Division - Li Han-chang
--87th Corps - Liu Yin-ku
---198th Division - Wang Yu-ying
-4th Army Corps - Li Pin-hsien
--29th Army Group - Wang Tsan-hau
---4th Corps - Peng Chen-fu
----149th Division - Wang Tse-chun
----162nd Division - Chang Chieh-cheng
---67th Corps - Hsu Shao-tsung
----150th Division - Liao Chen
----161st Division - Hsu Shao-tsung
--11th Army Group - Li Pin-hsien
---84th Corps - Chin Lien-fang
----188th Division - Liu Jen
----189th Division - Lin Ya-hsi
---48th Corps - Chang Yi-shun
----172rd Division - Huo Wei-chen
----174th Division - Chang Kuang-Wei
----176th Division - Ou Shou-mien
--68th Corps - Liu Ju-ming
---119th Division - Li Chin-tien
---143rd Division - Li Tseng-chih
--86th Corps - Ho Chih-chung
---103rd Division - Ho Shao-chou
---121nd Division - Mo Ting-fang
- 26th Army Group - Hsu Yuan-chuan
--10th Corps - Hsu Yuan-chuan
---41st Division - Ting Chih-pan
---48th Division - Hsu Chi-wu
--199th Division - Lo Shu-chia
-21st Army Group - Liao Lei
--31st Corps - Wei Yun-sung
---131st Division - Ling Tse-hui
---135th Division - Su Tsu-hsing
---138th Division - Mo Teh-hung
--7th Corps - Chang Kan
---171st Division - Chi Tao-cheng
---172nd Division - Cheng Shu-fen
-19th Army - Feng Chih-an
--77th Corps - Feng Chih-an
---37th Division - Chang Ling-yun
---132nd Division - Wang Chang-hai
- 51st Corps - Yu Hsueh-chung
--113th Division - Chou Kuang-lieh
--114th Divison - Mo Chung-heng
- 71st Corps - Sung Hsi-lien =Lanfeng
-- 61st Division - Chung Sung
-- 88th Division - Chung Pin
-- 36th Division - Chiang Fu-sheng
- 27th Army - Chang Tse-chung
-- 59th Corps - Chang Tse-chung
--- Cav. Regiment
--- 38th Division - Huang Wei-kang
--- 180th Division - Liu Chen-san
--- 13th Cavalry Brigade - Yao Ching-chuan
-45th Corps - Chen Ting-hsun
--- 125th Division - Wang Shih-chun
--- 127th Division - Chen Li
- 24th Army Group -
--57th Corps -
--- 111th Division -
--- 112nd Division -
--89th Corps-
--- 33rd Division -
--- 117th Division -
-27th Army Group - Yang Sen = defense of Anqing
--20th Corps - Yang Sen (concurrent)
---133rd Division - Yang Han-yu
---134th Division - Yang Han-chung
- 17th Army -
-- 1st Corps -
---1sth Division -
---78th Division -
[1] Hsu Long-hsuen and Chang Ming-kai, History of The Sino-Japanese War (1937-1945) 2nd Ed. ,1971. Translated by Wen Ha-hsiung , Chung Wu Publishing; 33, 140th Lane, Tung-hwa Street, Taipei, Taiwan Republic of China.
[2] IJA in China orbat, 1937 to 1945
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