Looks like there is a misunderstanding here. Do you think Americans can trade MONA/JPY? Bitflyer launched years ago in Japan (Jan 2014 https://ja.m.wikipedia.org/wiki/Bitflyer) and MONA/JPY trading was added back in October; I'm pretty sure I was one of the original people who informed English speakers that Monacoin was added to Bitflyer, in fact.

We are talking about Bitflyer USA which just launched recently. Americans cannot register on Bitflyer JP (there is, quite literally, a checkbox you need to check stating that you are not an American when you go to register (although you probably don't speak or read Japanese and thus probably never saw this disclaimer, if you're seriously telling me to open an account on Bitflyer JP like it's that easy)). Bitflyer USA does NOT have MONA/USD trading, or any altcoin trading as a matter of fact. Yet, at least, like I stated in my earlier post.

Here is the press release regarding Bitflyer USA: https://bitflyer.jp/pub/bitlicense-and-the-united-states-launch-ja.pdf

edit: sorry, posted the wrong press release from my browser history. fixed. (previous was https://bitflyer.jp/pub/bitflyer-to-expand-to-the-united-states-ja.pdf)