>Which makes me think that, in-setting, she's working at whatever the
>Japanese equivalent of Whitehall is, kickin' back at Naval
>Headquarters far from the actual shootin'.

It is unreasonably difficult to determine what the Japanese equivalent of Whitehall is. I can't even figure out from Google and Wikipedia where the Naval JSDF headquarters is, let alone where the IJN headquarters was. Internet, you have failed me.