No, that’s definitely a mistake on my part. I’m still learning Japanese so any corrections is welcome!
As for this specific line, I originally had Kage saying “The Shinkansen is called a Bullet Train in English for a reason”, but a Japanese person pointed out to me that a Japanese person wouldn’t say something like that, and suggested this line as an alternative that a native might say. I will admit neglecting to look up the specific meaning of the kanji in this case.
I will try looking for a more accurate line, while still keeping in the spirit of Kage’s joke here.