Luv the Type 1 Hayabusa. Often mistaken for the Type 0 during the early war campaigns in Malaya, Dutch East Indies and over China; it really was a formidable fighter. It outclassed most early-war Allied fighters. And by all accounts a delightfully manoeuvrable fighter to fly.
Some of this is tough. I think we are perpetuating errors. Some modeler will paint an airplane and we use it for the authentic paint scheme when it was wrong to start with. And the pictures are mostly in black and white. All those shots of Japanese aircraft without primer and peeling paint are but snapshots in time but if you look at the game pieces, they are all like that. None of that jibes with what I know of the Japanese. But without a photo.....
Forgive me if you are aware of this zerocinco, but the most knowledgable folks to talk to regarding accurate Japanese aircraft colours are the guys at http://www.j-aircraft.com/
. They are real fanatics when it comes to Pacific aircraft. and the good thing about it is that if they don't know they'll say so. But, honestly, there isn't much they don't know about aircraft colours.