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Anyone know where I can get info about the planes used by Japanese navy and army, USN and Army and the RAf and RN during 1923-25?? Need it for a project so please only the maintypes.
Will be cool to have variety, maybe 4/5 fighters for each side, 2 or 3 bombers and 2/3 floatplanes
Thank's a lot!

I would strongly recommend the following sites on the Allied side:
 
http://www.nationalmuseum.af.mil/research/aircraft/index.asp  This allows you to check out virtually every plane the US Army bought or designed in the period. 
 
http://www.history.navy.mil/branches/nhcorg4.htm#Aviation%20Data  The Naval Historical Center has a wealth of information on aircraft and operational topics for the Navy and Marine Corps in the period.
 
http://www.rafweb.org/Index.htm  This site gives a lot of information including squadron histories (including views of the aircraft used by each squadron) from the initial foundation of the squadron through the current day. 

On the Japanese side, you could start with Wikipedia and then chase the threads with their bibliographical information and comments in the articles since usually they state that the aircraft type xxx replaced type yyy and then go back and research the yyy aircraft. 

http://en.wikipedia.org/wiki/Category:Japanese_military_aircraft_1920-1929

One other point to consider is that this is a transitional period for Japan where a lot of their military aircraft were either purchased directly from Great Britain or France (through the teens Britain and Japan had a defensive alliance) or were license manufactures or narrow variants from western aircraft. 

I'm sure there are additional sources that dig into Japanese aviation, too.  Spend a half hour on Google.