Hobsun013
I guess the script and the flag would lead to Japan. For me - using the Michel catalog as my primary source - things from there on were easy as the occupation issues for all occupied countries are listed at the back of Japan.
I noticed that the Scott identifier has examples of issues for some of the occupied countries. They show that the lettering at the top indicates Japanese occupation while the lettering at the bottom is often the country name. Sadly the occupation issues for the Netherlands Indies are not shown. In a way misleading as one might be tempted to think that the examples are a complete representation of the occupation issues and look no further.
When it comes trying the Michel catalog I would suggest to pick up one volume of the Michel catalog and see how it works for you. The Michel has some advantages over the Scott catalog. It lists more stamp issuing entities - worldwide 2674 in Michel vs. 2089 in Scott, provides more details on numbers issued, printers, engravers and has images most often of all stamps in a set where Scott often has one image only to show the basic design. All this comes at a price though: a full set of Michel catalogs costs a small fortune - 3 to 4 times what a set of Scott would cost. As the Michel in my country is the standard catalog it was really the only option for me but I still work with the set I bought in the 1990's. An interesting option you may want to look into is the online version of the Michel catalog. At a cost of € 9.99 a month you get full worldwide coverage.
http://www.briefmarken.de/michelsho...ine-katalogeIn case you want to compare the coverage of stamp issuing entities you can check my list of stamp issuing entities where I have indicated what entities are listed in what catalogs. You will find that the difference is mainly in local and private issues. Also you can get a feel for how the Michel catalog is structured - as in what is listed where - because the list is set up using Michel as the primary source.
http://www.stampworldhistory.com/st...ng-entities/