Notes:

And it isn’t about where they are made, it’s about where these memes are popularized at.
The point of this image is that mostly Americans are obsessed with MLP: FiM, while Japanese are obsessed with trains. Obsessed enough to unstoppably spread viral media related to both things.

Copy paste this in Google for Japan’s meme:

大変な途中下車シリーズ

Or better yet, look up "Train MADs" on Know Your Meme.