Yes, they have separate Japanese Wikipedia articles: "American Coffee": https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%A1%E3%83%AA%E3%82%AB%E3%83%B3%E3%83%BB%E3

Yes, they have separate Japanese Wikipedia articles: "American Coffee": https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%A1%E3%83%AA%E3%82%AB%E3%83%B3%E3%83%BB%E3%82%B3%E3%83%BC%E3%83%92%E3%83%BC https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%A1%E3%83%AA%E3... Caffè Americano: https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%A1%E3%83%AA%E3%82%AB%E3%83%BC%E3%83%8E_(%E3%82%B3%E3%83%BC%E3%83%92%E3%83%BC) https://ja.wikipedia.org/wiki/%E3%82%A2%E3%83%A1%E3%83%AA%E3... The "American Coffee" article introduction paragraph even clarifies that this is a completely separate thing from Caffè Americano.