Hello there. Your question seems to be related to school work, so we just want to remind you, and any potential respondents, that our rules DO permit people to ask for help with their homework, so long as they are seeking clarification or resources, rather than the answer itself. This policy is further explained in this META Thread.

Additionally, while our users may be able to help you out here, we hope that you also will take the time to check out our six-part series, "Finding and Understanding Sources", which should hopefully prove to be helpful for you as you continue in your research.

Some secondary sources I could recommend that might be helpful to then comb for primary sources:

1. Pacific Crucible by Ian W. Toll

2. War Plan Orange by Ed Miller

3. While I have not read it this other book by Miller, published by the USNI Press seems right in your alley if you can get ahold of a copy of it: http://www.usni.org/store/books/clear-decks-60/bankrupting-enemy

4. Finally Shattered Sword by Parhsall and Tully while focused on Midway also has an exceedingly wonderful section on the prewar IJN, Yamamoto's rise to prominence, and the planning for Pearl and the storm of events leading to the yes order being given.

You'll want to look into the Racial Equality Proposal that was put forward by Japan at the Paris Peace Conference, the Greater East Asia Co-Prosperity Sphere, and the position of Japan in 1919 in relationship to European colonies.