Great Escape Games have released an Imperial Japanese Army Order of Battle for Rules of Engagement.
From their announcement:
Now up on the Great Escape Games website ready to download. This follows the posting of our USMC OoB for actions in the Pacific theatre in WWII.
We have other OoB’s in development and welcome any comments on our Playtest Feedback section of the forums.
Currently we are working on LRDG, Afrika Korps and British & Commonwealth platoons in the Desert War.
We also have set up a Clash of Empires section on the forum following our recent announcement about the release of these ancients rules next year.