You're not eating any of the gunkan-maki type, are you? Gunkan-maki (軍艦巻) literally means "Battleship sushi". It's the one on the bottom-left corner of the image

But Yamashiro isn't eating any Gunkan Maki either.

... Somehow it feels like cannibalism, so I don't feel good about it

I know that feeling.

Yup.