Slitherine

There are many commanders without traits so it looks that this is intended (?)
Most of them are fresh faces (to me), maybe they have not been assigned traits yet?
But there are also a couple of oldies, and you can't assign these commanders during a game. At least not Mannerheim as reported in another thread.

Here are a few Japanese mugshots.

Edit: Will Jap leaders assigned to kamikaze units return as wounded after completing their mission?
Edit2: It looks like air commanders can not be assigned to kamikaze air units. But naval commanders may be assigned to suicide boats/subs (while they're in port). Intended?

US

Spelling error?: Jospeh Dorris

I have never played as Japan, but I have not seen all those Allied Commanders ... where are they hidden and how do you access them in the game? I have earned a few, but nowhere near that many.

Same here regarding to both the Pacific campaigns...

You get access to various commanders if the scenario is created with triggers/events for unlocking those specific commanders.

IIRC there are a couple that have no stats because they're unused as commander. They can still be used in the briefings (as the guy showing near the briefing text). I did not check them all yet, but as long the commanders you do get in-game have their stats it should be no prob.