[He's trying...! They both need an outlet for their frustration and nerves.]

'fraid not. It's on another continent... [He really does sound remorseful at having to rain on Denji's parade. But it's a major hurdle they need to address before they can do anything useful. Maybe...]

We could ask Kaga to borrow one of her aircraft carriers. She might be willing to help. Especially if we say we're just going to look for the entrance.

[Whether they keep to their word upon finding it is another matter entirely, one they can deal with once it comes up.]