IJN Color--"Ame-Hiro"

Unfortunately, the article is outdated because they use the old Aeromaster line of paints as reference which is now out of production.

White Ensign has a line of Japanese colors and has Ame-Hiro premixed. Floquil Old Concrete is a good out of the bottle match.

Tamiya Deck tan is probably a little too light.

Hello chap
As for Japanese paints, go take a look at http://j-aircraft.com ; among others, there is a review of model colours compared to the numerous (original) paint denominations, and also a specific article on ame-iro.