Next, we have Japan. In Classic, the pieces were all a bright, pale yellow.
In early versions of Pacific, Japanese units were bright red. In later versions, they were a light pumpkin color.
In Revised and since, they have pretty much stuck with the pumpkin color, also referred to as burnt orange. It seems to me that the current versions are perhaps slightly darker pumpkin, but the difference is very slight from earlier versions. Also, I think the current Japanese units are somewhat more shiny than earlier versions, which seemed to have a duller finish.
One major change was the artillery piece. When first introduced, it came with the towing bars/support struts closed together as if for towing the artillery. A&A 1942 came out with a new artillery piece with the towing bars/support struts spread out, like it was ready to fire. I think this is much better. Plus it stands up better than the old ones. Also, while the 1942 game was the first one with the larger battleship sculpts for most nations, Japan’s Yamato class battleship was not significantly changed. I’m guessing that it was large enough already. It was the largest battleship piece in previous versions.
One mistake that came out in the Guadalcanal game was mis-moulded cruiser pieces. Some copies had Takao Class cruiser moulded in American Olive Green.
All Japanese pieces are unique to Japan except for the Mech Infantry, which is a copy of the German half-track.
Artillery = Type 92 howitzer
Mech Inf = SdKfz 251 Half-track (Germany)
Tank = Type 95 Ha-Go
Fighter = A6M2 Zero
Tac Bomber = D3A1 Val
Bomber = G4M2E Betty
Carrier = Shinano
Battleship = Yamato
Cruiser = Takao
Destroyer = Fubuki
Submarine = I-class
Transport = Hakusan Maru


