Well yeah, bringing in the actual Osaka castle is...problematic no matter how you look at it.

[Either you're removing a piece of history or, as is more likely, the piece of history is no longer there to be taken in the first place...]

Okay I know there aren't many castles up where you're from, but haven't you at least seen pictures or something? They've got watchtowers, dumbass. They were originally war fortresses, y'know.