How can American authors write text that says Microsoft introduced... then a word like "Emoji" that is so obviously Japanese
Authors still see the world through a lens, that until its big in US, it does not really exist, and then associate it to the US company that copied it first.
I'm guessing the author is refereing to emoticons from MSN Messenger. I don't think the term "emoji" gained popularity in the west until the iPhone came out, and made emoji wildly popular because of the one secret trick you had to do to enable the keyboard on non-Japanese phones.
Emoji means pictograph in japanese. I think it's fair to say that Americans "coined" the term as a name word for the characters where as the japanese were simply describing the characters literally.