I thought maybe it was supposed to say Americano, but it’s not the same. There’s an explanation here. It’s made from light roasted beans, and they say it most likely got it’s name from Americans in post-war Japan brewing coffee with lots of water or diluting it further before drinking.
I’m not American, but the name sounds a little judgemental to me.
This was semi-debunked by James Hoffman semi-recently.
Technically yes lighter roast has more caffeine in the beans because less is burned off.
However, you use more darker roast because lighter roast is heavier (because darker is effectively more dry). Also because the darker roast is more roasted, the caffeine in the beans may be more easily accessible/dissolvable.
Yeah I’m a huge fan of James but no one measures by weight really unless you’re a nerd like us. So hence why I said if measured by volume specifically.