I have an idea for a game but I fear it could be problematic

So I want to make a game that mixes the linear storytelling of half life and the ww2 elements of medal of honor, I want it to be set in the Pacific where the US was fighting against Japan

While thinking about this idea I noticed a problem, half life 1 mixes fighting with humans with fighting against aliens , and as everyone knows there were no aliens in WW2 and putting them on the story would feel disrespectful

So I had the idea, what if there were mythological japanese creatures that are representations and metaphors about the destruction the war brings

But I fear that if I don't do this correctly it could get very problematic very quickly

I don't want to be problematic, I want to be as respectful as I can be

What should I do ?