No, they DID NOT.
Yes, THEY DID.
JAPAN:
1). Japan declared they would fight on if not allowed to keep the Emperor.
2). The US did not agree and reiterated its demand to an "unconditional" surrender
3). So Japan responded that they would in fact fight on.
4). At that, the US relented.
You see, Japan did have "power to demand" and they used it.
GERMANY:
1). It's debatable for sure but Germany surrendered to the Sovjet Union when they stormed Berlin and Adolf "offed" himself.
2). Germany's power to demand stems from the fact that the Nazis fought on in the West against orders. Not that I think they had hopes of winning against the Western Allies but PROBABLY with the intention of surrendering to them.
So, "power to demand"? It depends upon how you look at it.
"Accommodation"? That is a spin and I'm sure you realize it. In any case we can discuss and define and redefine "accommodations" and "conditions" all month long as regards to Germany but the case of Japan is absolutely clear ..... the Japanese dictated the conditions and the US ate crow.