Talking about camouflage patterns, here's a quite unusual one, on a Model 2 "Sally. The very bad quality photo with a lot of noise, is from the book "Shashin-shu Nihon no Bakugekiki" (Photo Album Japanese Bombers) by Kojinsha, 2002.
The date is 1943, location Burma, but unfortunately the unit is unidentified.
The camouflage pattern is called "唐草模様" (karakusa moyo - check here). Below is a sample of the pattern.