Australia

https://www.awm.gov.au/collection/AWMOHWW2/

Canada

http://www.cmp-cpm.forces.gc.ca/dhh-dhp/his/oh-ho/index-eng.asp

 

Japan

The transcribed name of the official Japanese history of the Second World War is “Senshi Sosho”. Its a monumental work, covering virtually all aspects of the war except the Japanese war crimes. The Senshi Sosho totals 102 volumes that consist of 34 volumes on the Imperial General Headquarters, 37 volumes on the Army, 21 volumes on the Navy, nine volumes on the aerial war the Army and one volume of chronology.

To the Table of Contents

New Zealand

http://nzetc.victoria.ac.nz/tm/scholarly/subject-000004.html

United States Army

http://www.history.army.mil/catalog/browse/pubnum.html

United States Army Air Force (“Craven and Cate”)
http://www.afhso.af.mil/booksandpublications/conflictindex.asp

United States Marine Corps

https://www.usmcu.edu/content/publications-0

(scroll down to bottom of page)

and some (very few) British and Indian histories can be found (html) at Hyperwar

http://www.ibiblio.org/hyperwar/UN/UK/index.html

http://www.ibiblio.org/hyperwar/UN/India/index.html