Ian Nish 
Japanese Foreign Policy 1869-1942 [PDF ebook] 
Kasumigaseki to Miyakezaka

First published in 2001. This is Volume XI of the Foreign Policies of the Great Powers eleven part series and focuses on the policies of the Japanese, from 1869 to 1942. It includes sections on the Iwakura period, the Mutsu period, Aoki, Komura, Kato, Ishi, Shidehara, Tanaka, Uchida, Hirota, Konoe and ending with the Matsuoka period in 1941.